Energy in Collisions

When a moving object hits a still object with the same weight, what happens?

• The objects will bounce backwards and move in opposite directions.

• The objects will both stop moving

• The moving object will stop and the still object will start moving

• Nothing

When two objects collide, there is a _______ of energy.

• speed

• weight

• force

• transfer

How do you know there is a transfer of energy when two balls collide?

• the speed of the ball changes

• the weight of the ball changes

• the weight and speed change

• the ball doesn't move

When a bat and a ball collide during baseball, what causes the "whack" that you hear?

• energy is being transferred to the ball

• energy is being transferred to the air

• energy is being transferred to the bat

• energy is being transferred to the ground

What will happen when two soccer balls of the same weight collide at different speeds?

• the soccer balls will move in the same direction

• the soccer balls will bounce back at the same speed

• the soccer balls will bounce back and trade their speeds

• the two soccer balls will explode

Scientists cannot predict what would happen when objects collide if

• light were not conserved

• energy were not conserved

• speed affected the amount of energy

• weight affected the amount of energy

What would happen if two cars going at the same speed collided with eachother head on?

• they would shoot off into space

• they would bounce back and trade speeds

• they would move in the same direction they were traveling

• they would both bounce back at the same speed

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