Write the formula you would use if you were provided with the distance and the time, and you wanted to determine the speed of an object.

Why do heavy trucks take longer to stop than small cars when moving at the same speed?

When you look at the speedometer in a moving car, you can see the car's

• instantaneous speed.

• average speed.

• instantaneous acceleration.

• average acceleration.

Acceleration is defined as the

• change in position divided by the time needed to make that change.

• change in velocity divided by the time needed to make that change.

• time it takes to move from one speed to another speed.

• time it takes to move from one place to another place.

In each pair, circle the object the object that will have the greater inertia.

The law of inertia states that an object

• at rest will remain at rest only if an outside force acts on the object.

• will not continue moving unless a force is acting.

• will continue moving in a straight line or will remain stationary unless an outside force acts on it.

• All of the above.

The diagram below shows a cart of mass 0.20 kg on a frictionless surface. State the position (1, 2, 3, 4, or 5) where the gravitational potential energy is the greatest.

• Position 1

• Position 2

• Position 3

• Position 5

A vehicle is traveling at 20 m/s and comes to a stop in 5 seconds. What is its acceleration?

The modern motor cars that you will soon learn to drive are much safer than those your grandparents learned to drive. Which improved safety feature reduces the force of impact by increasing the time over which the collision occurs?

• Airbags

• Seatbelts

• Anti-lock Brakes

• Crumple Zones

Write the formula you would use if you wanted to find the acceleration of an object and were provided with the initial and final velocity, along with the time taken.