Collisions

What causes one object to change the motion of another object?

• a vibration

• a simulation

• a collision

• an illusion

The picture shows two cars involved in a collision. What happened when the first car hit the second car?

• The second car caused a decrease in the speed of the and position of the first car.

• The second car caused the speed of the first car to increase.

• The first car will cause a change in the position of the second car and speed change in the first car.

• The second car will cause the first car to stop moving.

Look at the photograph. The stronger bull will knock back the bull with less strength. Which of these factors will determine which bull will be knocked back?

• the height of the bull and the direction it runs

• the age of the bull and the distance it runs

• the mass of the bull and the distance it runs

• the mass of the bull and the speed it runs

A bat hits a ball. Which of these two terms could be used to describe the motion of the baseball?

• mass and force

• speed and direction

• direction and size

• expansion and energy

When a bell is rung, what causes the bell to ring?

• The energy is transferred from a rope to the bell and from the bell to the clapper. This vibrates and causes the clapper to create a sound.

• The energy is transferred from a rope to vibrate the bell. A vibration creates a sound to be transferred to the ears.

• The energy is transferred from a rope to the clapper, and from the clapper to the bell. The bell vibrates and creates a sound.