Lesson 3.1 Forces Review

Front

What happens when two forces of equal magnitude are applied in opposite directions?

Back

They will not move at all.

Front

What is the formula to calculate weight on Earth?

Back

Weight = mass × acceleration due to gravity (W = m × g).

Front

What is the unit of mass in the International System of Units (SI)?

Back

Kilogram (kg).

Front

What is the scientific unit of weight?

Back

Newton (N).

Front

How do you calculate the mass of an object if its weight on Earth is known?

Back

Mass = Weight / acceleration due to gravity (m = W / g).

Front

What is the acceleration due to gravity on Earth?

Back

Approximately 9.81 m/s².

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object, which depends on its mass.

Front

What is the definition of weight?

Back

The force of gravity acting on an object.

Front

If an object has a mass of 0.043 kg, what is its weight on Earth?

Back

Weight = 0.043 kg × 9.81 m/s² = 0.421 N.

Front

What is the difference between mass and weight?

Back

Mass is a measure of the amount of matter in an object, while weight is the force exerted by gravity on that mass.