Chapter 4 Review

The diagram shows a side view of a roller coaster. Which of the following could be a top view of this coaster?

What must occur for an object to experience acceleration?

A car travels a distance of 2.7 m in a time of 0.9 s. What is the velocity of the car? $$v\ =\ \frac{d}{t}$$

A student does an experiment rolling a cart down a ramp. The cart starts from rest a distance of 0.8 m up the ramp, and 1.5 s later the cart has a velocity of 2.0 m/s. What is the cart's acceleration? $$a\ =\frac{v}{t}$$

A cart that is .16 m in length passes through a sensor. The reading on the sensor says the velocity was 4.8 m/s during the time it took to pass through the sensor. How long did it take the cart to pass through the sensor? $$t\ =\ \frac{d}{v}$$

A wooden block is placed on a 1.5 m long inclined plane, with one end raised 0.5 m above the ground. If the block has a mass of 0.06 kg, what is the block's potential energy at the top of the incline? $$GPE\ =\ mgh$$

(From the previous question - GPE = 0.18 J)

What is the ball's Kinetic Energy as it rolls through the sensor at the bottom of the ramp?

In the diagram, the object's kinetic energy at point C is less than at point

If the kinetic energy of an object is 50 J when its speed is 5 m/s, then the object's mass must be $$m\ =\ \frac{2KE}{v^2}$$

A ball at the top of a hill has a potential energy of 10 J. What is its potential energy when it is a quarter of the way down the hill?