MAstering physics problem need solution!?

"A proton is released in a uniform electric field, and it experiences an electric force of 7.02×10−14 N toward the south. a) What is the magnitude of the electric field?"

tarley

over 13 years ago

Advanced Physics

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Physics Problem need help !?

"A physics professor did daredevil stunts in his spare time. His last stunt was an attempt to jump across a river on a motorcycle. (See the figure.) The takeoff ramp was inclined at 50.0 degress, the river was L= 37.0m wide, and the far bank was d = 19.0m lower than the top of the ramp. The river itself was H = 98.0m below the ramp. a. what should his speed have been at the top of the ramp for him to have just made it to the edge of the bank ? b. if his speed was only half the value found in part a, where did he land? can you please help me approach this problem and help me answer it. I don't know where to start"

bairloy

over 13 years ago

Advanced Physics

I need help for this physics problem?

"I need help on this problem The Graph (velocity vs time) is a incline straight line starting from the origin. The graph shows the velocity graph of a particle moving along the x-axis. Its initial position is x(initial) =2m at t(initial) = 0 s. At t =2s, what are the particle's (a) position, (b) velocity, and (c) acceleration? solution: I picked two points (0,0) and (3,6) found the slope m = (6-0) / (3-0) = 2 thus, v(t) = 2t (for the velocity) for acceleration: v'(t) = a(t) = 2m/s^2 for displacement: x(t) = ∫ v(t) dt = ∫ (2t) dt = t^2 +c x(2) = (2)^2= 4m but the computer says x(2) = 4m it's wrong."

albertein

over 13 years ago

Advanced Physics

I need help answering a physics problem?

A truck on a straight road starts from rest, accelerating at 2.00 m/s^2 until it reaches a speed of 20.0 m/s. Then the truck travels for 20.0 s at constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.00 s. (a) How long is the truck in motion? (b) What is the average velocity of the truck for the motion described?

leonpan

over 13 years ago

Advanced Physics

I need help with a physics problem?

An electron in a cathode-ray tube accelerates uniformly from 2.00x10^4 m/s to 6.00x10^6 m/s over 1.50 cm. (a) In what time interval does the electron travel this 1.50 cm? (b) What is its acceleration?

goldr4k3

over 13 years ago

Advanced Physics

Serious Need of Physics Help?

"So right now we are doing Ohm's Law and I am unsure how to solve problems that involve cost. If someone could just thoroughly explain this problem please: How much does it cost to watch a complete 22 h long World Series on a 516 W television set? Assume that electricity costs $0.07/kW · h. Answer in units of cents"

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