Contact Forces Review - TG

Front

What happens to acceleration when mass increases?

Back

According to Newton's second law, if mass increases, acceleration decreases, assuming the force remains constant.

Front

Which ball has the most kinetic energy when rolled down a ramp?

Back

The ball with the greatest mass will have the most kinetic energy, as kinetic energy is proportional to mass.

Front

If a bear pushes on a tree with 20 N of force and the tree doesn't move, how much force is the tree exerting back on the bear?

Back

The tree is exerting 20 N of force back on the bear, according to Newton's third law.

Front

What does Newton's third law state?

Back

Newton's third law states that for every action, there is an equal and opposite reaction.

Front

True or False: When neurons tear, the destroyed axons release toxins that cause death to other neurons.

Back

True.

Front

What is the formula for calculating kinetic energy?

Back

Kinetic energy (KE) = 1/2 mv², where m is mass and v is velocity.

Front

Define contact force.

Back

Contact force is a force that acts at the point of contact between two objects.

Front

What are the two main types of contact forces?

Back

The two main types of contact forces are frictional force and normal force.

Front

What is frictional force?

Back

Frictional force is the force that opposes the motion of an object.

Front

What is normal force?

Back

Normal force is the support force exerted upon an object that is in contact with another stable object.