Unit 3: Forces and Newton's Laws of Motion

Front

What is mass?

Back

Mass is a measure of the amount of matter in an object, typically measured in kilograms (kg). It remains constant regardless of location.

Front

What is weight?

Back

Weight is the force exerted by gravity on an object, calculated as the product of mass and gravitational acceleration (W = mg). It varies depending on the gravitational field.

Front

True or False: Your mass on Earth is the same on the Moon.

Back

True

Front

True or False: Your weight on Earth is the same on the Moon.

Back

False

Front

What does Newton's first law of motion state?

Back

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net external force.

Front

What does Newton's second law of motion state?

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 does Newton's third law of motion state?

Back

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

Front

If a 20 kg bike accelerates at 10 m/s², what is the force applied? (F=ma)

Back

200 Newtons

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. It is directly related to mass.

Front

What is gravitational acceleration on Earth?

Back

Approximately 9.81 m/s².