CU5: Newton's 3 Laws of Motion

Front

What is Newton's 1st 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 inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. The more mass an object has, the greater its inertia.

Front

What is Newton's 2nd 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. This is often expressed as the formula F=ma (Force = mass x acceleration).

Front

What is Newton's 3rd Law of Motion?

Back

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

Front

How does mass affect acceleration?

Back

An object with more mass requires more force to accelerate at the same rate as an object with less mass.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's 2nd Law, the relationship is defined by the equation F=ma, where F is force, m is mass, and a is acceleration.

Front

What happens to a skateboarder who hits a rock while moving?

Back

The skateboard stops due to an unbalanced force (the rock), but the skateboarder continues moving forward due to inertia, illustrating Newton's 1st Law.

Front

Why is it harder for a semi-truck to stop than a car?

Back

A semi-truck has more mass, which means it has more inertia to overcome when stopping, making it harder to stop compared to a car.

Front

What is an example of Newton's 3rd Law of Motion?

Back

When you jump off a small boat, you push the boat backward as you move forward.

Front

What does it mean for forces to be balanced?

Back

Balanced forces are equal in size and opposite in direction, resulting in no change in motion.