Collisions

What happens when two objects collide?

• Energy is changed into force.

• Energy is transferred from one object to another.

• Energy is created and the objects move faster.

• Energy is destroyed and the objects move slower.

Which of the following collisions would cause a still object to move at the speed of the object that hit it?

• a collision of a moving object with a lighter still object

• a collision of a moving object with a heavier still object

• a collision of a moving object with a still object of the same weight

• a collision of a large, light object and a still object that is smaller, heavier

When two objects of the same weight traveling at different speeds collide head on, both objects

• stop moving

• change direction and move at a slower speed

• change direction and move at their original speed

• bounce back and travel at their original speed

Some of the energy transferred during a collision can produce _________.

• light

• heat

• sound

• all of the above

In the image below, Jonah is about to kick the football. Which of the following BEST explains how Jonah can tell that energy transfers from his foot to the ball during the collision?

• the ball does not move

• the speed of the ball changes

• the weight of the ball changes

• the weight and speed of the ball changes

When a heavier object collides with a lighter object, the lighter object

• completely stops

• moves faster

• moves slower

• moves at the same speed

Most objects that collide transfer energy to the air as

• light

• weight

• sound

• motion

When energy moves an object across a surface

• heat is formed

• light s formed

• sound is formed

• a collision is formed

A red car and blue car are going to collide. The red car is moving faster than the blue car. What will happen?

• The blue car will travel in the opposite direction at a faster speed after the collision

• The red car will travel in the opposite direction at a faster speed after the collision

• The blue and red cars will travel in the opposite directions at the same speed after the collision

A basketball bounced on the ground. With each bounce, the bounce height became lower and lower. Why?

• The basketball's energy was transferred to the ground

• Friction caused the basketball to slow down

• The basketball's energy was transferred to the air

• All of the above