Auburn Physics Final Common Study Guide + Answers Graded A+

A frog leaps vertically into the air and encounters no appreciable air resistance. Which statement about the frog's motion is correct? A) On the way up its acceleration is 9.8 m/s^2 directed upwards, and on the way down its acceleration is 9.8m/s^2 directed upwards. B) On the way up and the way down its acceleration is 9.8 m/s^2 directed downwards, and at the highest point its acceleration is zero. C) On the way up, on the way down, and at the highest point its acceleration is 9.8 m/s^2 directed downwards. D) At the highest point of the motion it reverses the direction of its acceleration. E) We do not have enough information to know. - Answer-C) On the way up, on the way down, and at the highest point its acceleration is 9.8 m/s^2 directed downwards. A car traveling at a velocity v 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 - Answer-B) 4d 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. - Answer-D) Down the ramp and then up the ramp.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. - Answer-C) They both experience a force which has the same magnitude. A ball can be rolled down one of three different ramps, as shown in the link below. The final elevation loss of each of the ramps is the same (i.e. they all have the same change in height). Neglecting friction, for which ramp will the speed of the ball be the highest at the bottom? Assume that the ball stays on the track. _ A) Ramp Z B) Ramp X C) Ramp Y D) The speed of the ball will be the same for all ramps. E) We do not have enough information to know. - Answer-D) The speed of the ball will be the same for all ramps. A constant net torque is applied to an object. Which of the following will be constant throughout the motion of the object? Assume that the object does not deform or change shape. A) The tangential velocity B) The angular velocity C) The angular position D) The angular acceleration E) The angular speed - Answer-D) The angular accelerationA wheel starts spinning from rest with uniform angular acceleration. If its angular speed at the end of the first three seconds is ω1, then at the end of 6 seconds, its angular speed will be? A) 9 ω1 B) 4 ω1 C) 6 ω1 D) 2 ω1 E) 20 ω1 - Answer-D) 2ω1