A car traveling at a velocity nu takes a distance d to stop after the brakes are

Question

A car traveling at a velocity nu takes a distance d to stop after the brakes are applied. What is the stopping distance if the car initially travels at a velocity 2v? Assume that the acceleration due to braking is the same in both cases. A) 2d B)4d C) 0.5d D) 0.25d E) d 3. A person gives a box a shove so that it slides up a ramp, then reverses its motion and slides down. The direction of the force of friction is A) Always down the ramp. B) Up the ramp and then down the ramp. C) Always up the ramp. D) Down the ramp and then up the ramp. E) Perpendicular to the slope at all times. 4. A small sports car collides head on with a massive truck. Which vehicle experiences the greater impact force? A) The car. B) The truck. C) They both experience a force which has the same magnitude. D) We do not have enough information to know. E) They both experience zero force.

Explanation / Answer

2.

Answer is B) 4 d

3.

D) Down the ramp and then Up the ramp

4.)

D) we do not have the enough information to know

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