Unit 4 Forces ~newton's laws of motion

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Front

What is Newton's Second Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

Front

What is Newton's Third Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

What is a contact force?

Back

A force that occurs when two objects are physically touching each other.

Front

What is frictional force?

Back

A force that opposes the motion of an object when it is in contact with another object.

Front

What is weight force?

Back

The force exerted by gravity on an object, calculated as the mass of the object multiplied by the acceleration due to gravity (W=mg).

Front

What is thrust?

Back

A force that pushes an object forward, often used in the context of engines or rockets.

Front

What is buoyant force?

Back

The upward force exerted by a fluid on an object immersed in it, which counteracts the weight of the object.

Front

What happens when a linebacker and a ballerina collide according to Newton's Third Law?

Back

Both experience the same force, regardless of their different masses.

Front

Why does the ballerina appear to have more damage after colliding with the linebacker?

Back

Due to Newton's Second Law, the same force causes a greater acceleration (and thus more visible damage) on the lighter ballerina.