Review for Collisions Test

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

Which has greater kinetic energy: a standing adult or a running adult?

Back

A running adult has greater kinetic energy due to their higher velocity.

Front

What is a free body diagram?

Back

A free body diagram is a graphical representation used to visualize the forces acting on an object, showing all the forces as arrows pointing away from the object.

Front

In a two system free body diagram, how do the arrows representing forces behave?

Back

The arrows will be the same size and point in opposite directions.

Front

What principle explains that when two objects make contact, they apply forces on each other?

Back

Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction.

Front

What type of diagram can be used to represent forces acting on cars in a collision?

Back

A free body diagram can be used to represent the forces acting on the cars.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy increases with mass; if two objects are moving at the same speed, the one with greater mass will have more kinetic energy.

Front

What happens to kinetic energy if the speed of an object doubles?

Back

If the speed of an object doubles, its kinetic energy increases by a factor of four, since KE is proportional to the square of the velocity.

Front

What are action and reaction forces?

Back

Action and reaction forces are pairs of forces that are equal in size, but opposite in direction, acting on two different objects.

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented by the formula p = mv.