Quiz /Test #3 College class Uniform Accelerated Motion Period Date Name
Show work, follow GUESS method, do calculations, write symbols and units of each quantity.
Formulas needed:
a = Vf- Vi ; t= Vf- Vi ; d= ½ (Vf +Vi)* t ; Vf= Vi + a *t
T a

1. A shuttle bus slows down from 20.0 m/s to a complete stop. It takes 5 seconds for the bus to slow down. Find its acceleration.
Givens:

Unknowns:

Equation:

Substitute:

Solve:

2. When Heather applies the brakes of her car, the car slows uniformly from 15.0 m/s to 0.0 m/s in 2.50 s. How many meters before a stop sign she must step on the brakes in order to stop at the sign?
Givens:

Unknowns:

Equation:

Substitute:

Solve:

3. A car starts from rest and travels for 5.0 s with a constant acceleration of −1.5 m/s2.
a. What is the final velocity of the car?
Givens:

Unknowns:

Equation:

Substitute:

Solve:

The harmonic motion of a particle is given by f(t) = 2 cos(3t) + 3 sin(2t), 0 ? t ? 8. (a) when is the position function decreasing? (round you

Modify the equation fδt=δ (mv) to find the force of friction.

First, launch the video below. you will be asked to use your knowledge of physics to predict the outcome of an experiment. then, close the video window and answer the question at right. you can watch the video again at any point. part a as in the video, we apply a charge +q to the half-shell that carries the electroscope. this time, we also apply a charge –q to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? view available hint(s) as in the video, we apply a charge + to the half-shell that carries the electroscope. this time, we also apply a charge – to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? it deflects more than it did at the end of the video. it deflects the same amount as at end of the video. it does not deflect at all. it deflects less than it did at the end of the video. submit