Newton's Laws of Motion

What is Newton's First Law of Motion (law of inertia)?

An object will remain at rest or continue with constant velocity unless acted on by an unbalanced force.

What must occur for a body to be at rest according to Newton's First Law?

A force must balance the weight acting in the opposite direction.

Give an example of Newton's First Law in action.

An ice hockey puck is stationary on the ice because the weight of the puck is balanced by the upward force from the ice.

What is the formula that represents Newton's Second Law (law of acceleration)?

F = ma (Force equals mass times acceleration).

How is acceleration related to unbalanced force according to Newton's Second Law?

Acceleration is proportional to, and in the same direction as, the unbalanced force applied.

Give an example that illustrates Newton's Second Law.

To give a soccer ball the same acceleration as a table tennis ball, a larger force must be applied due to the soccer ball's greater mass.

What does Newton's Third Law (law of reaction) state?

When one object applies a force to another, the second object applies an equal but opposite force back.

What is significant about the forces in Newton's Third Law?

The forces are equal in size but opposite in direction and act on different bodies.

Can the effects of the forces in Newton's Third Law be different? Why?

Yes, the effects can differ if the bodies involved have different masses.

When do the forces happen?

At exactly the same time

Provide an example that demonstrates Newton's Third Law.

When a sprinter pushes against starting blocks, the blocks push back with the same force in the opposite direction.