I have tried to answer the following questions. Please let meknow if I missed one and why.

1) A light car and a heavy car are headed toward each other fromopposite directions at the same speed. The ground is level. Whichof the two will be harder to stop?

the heavier car

2)

Instead of stopping the cars, you jump out of the way. The twocars crash head-on. After the crash what do you see? The two cars are completely stopped. The two cars move together in the direction the larger car wasmoving. The two cars move together in the direction the smaller car wasmoving.

The two cars move together in the direction of the largercar

3) You are standing on a skateboard on a level surface. Someonethrows a ball to you along the direction the skateboard ispointing, and you catch it. In what direction do you move aftercatching the ball?

away from the ball's thrower

4) You are moving on a skateboard at constant speed towards aball suspended from a very fine thread. When you reach the ball,you grab it and the thread breaks. What happens to your speed?

5)

A moving billiard ball hits a stationary billiard ball directlyso that the first ball stops. How do you expect the speed of thesecond ball to compare with the first?

It is significantly smaller

It is about the same

It is significantly larger

It doesn't move

It is about the same

6) You stand on a skateboard in the road with your board facingeast. An 18-wheel truck from the west impacts with you withoutbraking. How is the truck's speed affected by you?

The truck's speed is slightly less

7) Two trains of equal mass on the same track both travel east.Train A is in the lead and is moving quite slow. Train B is behind,but moving very quickly. When Train B catches Train A they stick,what do you think will happen?

They will move faster than train A but slower than B