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Kinematics and Dynamics Problems, Exams of Physics

Chamberlain College of NursingPhysics

A collection of physics problems related to kinematics and dynamics. The problems cover a wide range of topics, including motion with constant speed, acceleration, projectile motion, newton's laws of motion, work, energy, and power. The correct answers to the problems, which suggests it could be used as a study guide or practice material for students learning these concepts. The level of difficulty and complexity of the problems indicates that this document would be most suitable for university-level physics courses, particularly those covering introductory mechanics. The document could be useful for students as study notes, lecture notes, summaries, assignments, or exam preparation, depending on the specific needs and requirements of the course.

Typology: Exams

2023/2024

Available from 08/26/2024

maish-daniel
maish-daniel 🇺🇸

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RIO SOLADO - PHY 111 Midterm 1Questions with Answers
Latest Update 2024
1. A student moves 8.0 m to the west, 6.0 m to the north, and 10.0 m to the east.
What is the magnitude of the displacement? - Correct Answer 6.3 m
2. Examine the position vs. time graph below. What is the velocity of the object at t
= 5.0 s? - Correct Answer -5 m/s
3. A student measures the mass of an object at 4.68 g and the volume of the object
at 2.3 mL. The student calculates the density as 2.03478 g/mL. A second student
disagrees with the density. Which of the following statements would explain why
the second student disagrees? - Correct Answer The number of decimals in the
answer does not show proper precision.
4. Examine the position vs. time graph below. Which of the following correctly
describes the motion of the object? - Correct Answer Forwards at a constant
speed and then backward at a constant speed
5. A car moving at a constant 25 m/s travels for 3.0 seconds. What is the distance
traveled by the car? - Correct Answer 75 m
6. A student measures the mass of an object at 4.68 g. Which of the following
statements is most accurate? - Correct Answer he first two digits are measured
and the last digit is estimated.
7. A student models the constant speed motion of an object with the following
equation:
x = (4 m/s) t + (-15 m)
8. Which of the following descriptions of motion is consistent with this equation? -
Correct Answer The object starts at a negative position and travels forwards.
9. How much time will it take for an object traveling at a constant speed of 20 m/s to
travel 15 m? - Correct Answer 0.75 s
A student models the constant speed motion of an object with the following equation:
x = (-2 m/s) t + (4 m)
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Partial preview of the text

Download Kinematics and Dynamics Problems and more Exams Physics in PDF only on Docsity!

RIO SOLADO - PHY 111 Midterm 1Questions with Answers

Latest Update 2024

  1. A student moves 8.0 m to the west, 6.0 m to the north, and 10.0 m to the east. What is the magnitude of the displacement? - Correct Answer 6.3 m
  2. Examine the position vs. time graph below. What is the velocity of the object at t = 5.0 s? - Correct Answer -5 m/s
  3. A student measures the mass of an object at 4.68 g and the volume of the object at 2.3 mL. The student calculates the density as 2.03478 g/mL. A second student disagrees with the density. Which of the following statements would explain why the second student disagrees? - Correct Answer The number of decimals in the answer does not show proper precision.
  4. Examine the position vs. time graph below. Which of the following correctly describes the motion of the object? - Correct Answer Forwards at a constant speed and then backward at a constant speed
  5. A car moving at a constant 25 m/s travels for 3.0 seconds. What is the distance traveled by the car? - Correct Answer 75 m
  6. A student measures the mass of an object at 4.68 g. Which of the following statements is most accurate? - Correct Answer he first two digits are measured and the last digit is estimated.
  7. A student models the constant speed motion of an object with the following equation: x = (4 m/s) t + (-15 m)
  8. Which of the following descriptions of motion is consistent with this equation? - Correct Answer The object starts at a negative position and travels forwards.
  9. How much time will it take for an object traveling at a constant speed of 20 m/s to travel 15 m? - Correct Answer 0.75 s A student models the constant speed motion of an object with the following equation: x = (-2 m/s) t + (4 m)
  1. Which of the following descriptions of motion is consistent with this equation? - Correct Answer The object starts at a positive position and travels backwards.
  2. Examine the velocity vs. time graph below. Which of the following correctly describes the motion of the object? - Correct Answer Constant speed forwards and then constant speed backward
  3. Convert 35.0 mph to m/s. (1 mi = 1.6 km) - Correct Answer 15.6 m/s
  4. Which of the following is a vector measurement? - Correct Answer Displacement
  5. Convert 4200 cm to miles. (1 mi = 1.6 km) - Correct Answer 0.026 mi
  6. A car travels forwards at a constant speed of 30 m/s for 5.0 seconds. How far will the car move in this time? - Correct Answer 150 m
  7. Examine the velocity vs. time graph below. What is the total distance? - Correct Answer 8 m
  8. Examine the velocity vs. time graph below. What direction is the object moving at t = 4.0 s? - Correct Answer Backwards
  9. A student wants to compare a set of measurements in order to analyze the precision of an instrument. Which of the following methods would be most appropriate? - Correct Answer Examine the percent difference between the largest and smallest measured values
  10. How much time will it take for a car traveling at a velocity of -4.0 m/s to travel a distance of 30 m? - Correct Answer 7.5 m
  11. A jogger starts at a position of 4.0 m and moves forwards at a constant rate ending at a position of 12.0 m at a time 4.0 s later. What is the speed of the jogger? - Correct Answer 2.0 m/s
  12. A student moves 3.0 m south, 6.0 m east, and 1.0 m north. What is the angle of the displacement? - Correct Answer -18°
  13. The grid below shows two vectors A and B. What is the magnitude of the sum of the vectors A+B? - Correct Answer 5.
  14. A student launches a rocket with some initial velocity v at some angle θ. The rocket hits a wall on its way back down to the ground. (See the diagram below.) Which of the following statements is most accurate? - Correct Answer The
  1. The grid below shows the path a student takes through a campus area. What is the approximate direction of the student's overall displacement? (Be careful—this is not a position vs. time graph.) - Correct Answer 56°
  2. A student standing on the edge of a cliff throws a rock downward at a speed of 7.5 m/s at an angle 40° below the horizontal. It takes the rock 2.4 seconds to hit the ground. How tall is the cliff? - Correct Answer 39.8 m
  3. A student rolls two balls off of a table. Ball A has twice the mass of ball B. Both balls leave the table at the same time with the same starting velocity. Which ball will hit the ground first? (Air resistance is negligible.) - Correct Answer A will hit the ground at the same time as B.
  4. Vector A has components A = <-2, 5> m/s and vector B has components B = <6, -2> m/s. What is the magnitude of vector C if C = A + B? - Correct Answer 5 m/s
  5. A student throws a rock horizontally off a 5.0 m tall building. The rock's initial speed is 6.0 m/s. How long will it take the rock to reach the ground? Air resistance is negligible. - Correct Answer 1.0 s
  6. A student fires a bullet horizontally out of a gun. At the same time the bullet leaves the gun, the student drops a second bullet from the same height. Which bullet hits the ground first? - Correct Answer The two bullets will hit the ground at the same time.
  7. A student rolls two balls off of a table. Ball A has twice the mass of ball B. Both balls leave the table with the same starting velocity. Which ball will land further away from the table? (Air resistance is negligible.) - Correct Answer A and B will land the same distance from the table.
  8. Mars has a gravitational field strength of 3.7 N/kg near its surface. If air resistance is negligible, then an object dropped on Mars would have an acceleration that is - Correct Answer equal to 3.7 m/s2.
  9. How long will it take an object to travel a distance of 50 m if it starts from rest and accelerates at a rate of 12 m/s2? - Correct Answer 2.9 s
  10. A car accelerates from rest at a rate of 20 m/s2. How far will the car have traveled by the time it reaches a speed of 30 m/s? - Correct Answer 22.5 m
  11. A box moving on a horizontal surface with an initial velocity of 20 m/s slows to a stop over a time period of 5.0 seconds due solely to the effects of friction. What is the coefficient of kinetic friction between the box and the ground? - Correct Answer 0.
  1. Three students move identical tables across identical carpeted floors with the same applied force. The direction of the applied force on table A is horizontal. The direction of the applied force on table B is 45° below the horizontal. The direction of the applied force on table C is 45° above the horizontal (see below). Which table will experience the smallest friction force? - Correct Answer Table C will experience the smallest friction force.
  2. A negative acceleration indicates that an object might be - Correct Answer moving forward while slowing down.
  3. An 800 kg car starts from rest and travels a distance of 75.0 m in 5.0 seconds. Which of the following is the correct net force acting on the car during this time? - Correct Answer 4800 N
  4. Sphere A is initially at rest on the ground and is kicked so that it has an initial velocity of vo at an angle of θ. Sphere B is also initially at rest on the ground and kicked so that it has an initial velocity is 2vo at the same angle θ. Air resistance is negligible. The two spheres are identical. Consider both spheres at the moment when they have reached their respective maximum heights. Which of the following statements is accurate? - Correct Answer The net force on sphere A is equal to the net force on sphere B.
  5. A student applies a steady 100 N force at an angle 45° below the horizontal to a 25 kg box. The maximum static friction force on the box is 100 N. Which of the following is the Newton's third law reaction pair force to the 100 N force applied by the student? - Correct Answer The force of the box on the student
  6. A student gives a 5.0 kg box a brief push causing the box to move with an initial speed of 8.0 m/s along a rough surface. The box experiences a friction force of 30 N as it slows to a stop. How long does it take the box to stop? - Correct Answer 1.3 s
  7. A student places a 3.0 kg block on a frictionless ramp with an angle of incline of 35°. What is the acceleration of the block? - Correct Answer 5.6 m/s
  8. The following force vector diagram shows all of the forces acting on a box. Which of the following correctly describes the motion of the box? - Correct Answer None of the above describe the motion of the box.
  9. What angle is necessary to keep a 10 kg box motionless if the coefficient of static friction between the box and the ramp is 0.55? - Correct Answer 28.8°
  10. A student studying martial arts breaks a board with her hand. Compare the force of the student on the board to the force of the board on the student. - Correct Answer The force of the student on the board is equal to the force of the board on the student.
  1. A student sets a box at the top of a ramp with a steep angle of incline. The box will start from rest and will slide down the ramp and up a second ramp whose angle of incline is much less steep. Point P shows the position on the second ramp that is at the same height as the block's starting point in the first ramp. Which of the following statements is correct? Assume negligible friction losses. - Correct Answer The box will just barely hit point P before it starts to slide back down the second ramp.
  2. What is the cost to run a 900 W medium-sized window air conditioning unit for 8.0 hours if the electricity company charges $0.20 per kW-hr? - Correct Answer $ 1.
  3. The applied force vs. distance stretched data for two different springs A and B is shown on the graph below. Identical boxes are pressed up against each of the springs. Both springs are compressed the same amount. When released, the box that will have the greatest final speed will be the box that was pressed against - Correct Answer Spring A
  4. Work is done on a spring causing the spring to compress an amount x. If the total work done on the spring is doubled, what will the total spring compression be? - Correct Answer x√
  5. What is the kinetic energy of a 1000 kg car traveling at a speed of 20 m/s? - Correct Answer 200 kJ
  6. Student A lifts a box of mass m to a height of h. Student B lifts a box of mass 2 m to a height of h/2. Which student exerted the greatest power? - Correct Answer Not enough information
  7. A 500 kg rollercoaster car starts from rest at the top of a 10.0 m tall hill. It then travels down the track and up a loop. The top of the loop is 7.0 m from the ground. What is the speed of the rollercoaster car at the top of the loop assuming negligible friction losses? - Correct Answer 7.7 m/s
  8. An elevator moves upwards while getting faster. Which of the following statements is correct? - Correct Answer Work is converted into kinetic and gravitational energy.
  9. How much energy is stored in spring that has been compressed 0.20 m if the spring constant is 300 N/m? - Correct Answer 6 J
  10. A student pushes a 0.2 kg box against a spring causing the spring to compress 0.15 m. When the spring is released, it will launch the box vertically into the air. What is the maximum height the box will reach if the spring constant is 300 N/m?
    • Correct Answer 1.7 m
  1. Power is best defined as - Correct Answer rate of energy transfer
  2. A car travels at a constant speed up a hill from point A to point B as shown in the diagram below. Which of the following statements is most correct? - Correct Answer The gravitational energy increases, and the kinetic energy remains the same.
  3. A student connects a 1 hp motor to a bicycle. How much time will it take for the bicycle to accelerate from rest to a speed of 5.0 m/s if the combined mass of the student and the bicycle is 120 kg? (1 hp = 746 W) - Correct Answer 2 sec
  4. What is the horsepower required for a 1200 kg car to travel from rest to a speed of 20 m/s in 7.0 seconds? (746 W = 1 hp) - Correct Answer 46 hp
  5. Energy is best defined as - Correct Answer the ability to make a system change in some way.