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Instantaneous Acceleration - General Physics - Exam, Exams of Physics

Bharat Ratna Dr. B. R. Ambedkar UniversityPhysics

This is the Exam of General Physics which includes Orbital Acceleration, Component of Ball’s Velocity, Kinematic Equations, Accelerometer, Speedometer, Instantaneous Acceleration, Velocity Versus Time Graph etc. Key important points are: Instantaneous Acceleration, Velocity Versus Time Graph, Average Velocity, Average Acceleration, Horizontal Component, Greatest Average Speed, Part of Force, Vertical Component, Home Plate

Typology: Exams

2012/2013

Uploaded on 03/07/2013

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Physics 202A FIRST EXAM Chapters 1 - 3 Spring 2013
1
Name:___________________________________
Solve the following problems in the space provided. Use the back of the page if needed. Each problem is
worth 20 points. You must show your work in a logical fashion starting with the correctly applied
physical principles. The equations you need are on the equation sheet. Your score will be maximized if
your work is easy to follow because partial credit will be awarded.
1. The velocity versus time graph for a stunt car is
shown at the right. Answer the following questions.
Be sure to explain you reasoning for full credit.
a. Find the velocity at t = 1.0s
b. Find the velocity at t = 4.0s
c. Find the velocity at t = 8.0s
d. Find the average velocity between t = 0s and t = 2.0s
e. Find the instantaneous acceleration at t = 1.0s
f. Find the instantaneous acceleration at t = 4.0s
g. Find the instantaneous acceleration at t = 8.0s
h. Find the average acceleration between t = 0s and t = 2.0s.
i. Find the average acceleration between t = 0s and t = 6.0s.
j. Find the average acceleration between t = 0s and t = 10.0s.
pf3

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Name:___________________________________ Solve the following problems in the space provided. Use the back of the page if needed. Each problem is worth 20 points. You must show your work in a logical fashion starting with the correctly applied physical principles. The equations you need are on the equation sheet. Your score will be maximized if your work is easy to follow because partial credit will be awarded.

  1. The velocity versus time graph for a stunt car is shown at the right. Answer the following questions. Be sure to explain you reasoning for full credit. a. Find the velocity at t = 1.0s b. Find the velocity at t = 4.0s c. Find the velocity at t = 8.0s d. Find the average velocity between t = 0s and t = 2.0s e. Find the instantaneous acceleration at t = 1.0s f. Find the instantaneous acceleration at t = 4.0s g. Find the instantaneous acceleration at t = 8.0s h. Find the average acceleration between t = 0s and t = 2.0s. i. Find the average acceleration between t = 0s and t = 6.0s. j. Find the average acceleration between t = 0s and t = 10.0s.
  1. In the position vs. time graphs below, all the times are in seconds (s), and all the positions are in meters (m). Rank these graphs on the basis of which graph indicates the greatest average speed, where the average speed is calculated from the beginning to the end of motion. Explain your reasoning to get full credit.
  2. A dog yanks on another dogs tail as shown. He exerts a force of 20.0N at an angle of 37˚ below the horizontal. Find (a)the part of this force that is to the right and (b)the part of the force that is downward. Physics Ranking Tasks 11 Mechanics Position Time Graphs—Average Speed 10 In the position vs. time graphs below, all the times are in seconds (s), and all the positions are in meters (m). Rank these graphs on the basis of which graph indicates the greatest average speed, where the average speed is calculated from the beginning to the end of motion. Give the highest rank to the one(s) with the greatest average speed, and give the lowest rank to the one(s) indicating the least average speed. If two graphs indicate the same average speed, give them the same rank. t t t x x x t t t x (^) x x 30 3 5 10 5 5 10 2 30 8 10 A (^) B C D (^) E^10 F 10 10 10 Greatest 1 2 3 4 5 6 Least Or, none of these are moving at all. _____________ Or, the average speed is the same for all of these. ____________ Please carefully explain your reasoning. How sure were you of your ranking? (circle one) Basically Guessed Sure Very Sure 1 2 3 4 5 6 7 8 9 10 (^10) K. W. Nicholson

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