Mass & Weight

Front

What is mass?

Back

Mass is the amount of matter in an object, usually measured in kilograms (kg). It does not change regardless of location.

Front

What is weight?

Back

Weight is the force exerted by gravity on an object, calculated as mass times the acceleration due to gravity (W = m × g). It is measured in newtons (N).

Front

How is mass measured?

Back

Mass is measured using a balance scale.

Front

How is weight measured?

Back

Weight is measured using a spring scale.

Front

What happens to mass when you travel to the Moon?

Back

Mass remains the same regardless of location.

Front

What happens to weight when you travel to the Moon?

Back

Weight decreases because the Moon has less gravity than Earth.

Front

What is the gravitational force on Earth?

Back

The gravitational force on Earth is approximately 9.8 m/s².

Front

What is the gravitational force on the Moon?

Back

The gravitational force on the Moon is about 1.6 m/s².

Front

If an object has a mass of 10 kg, what is its weight on Earth?

Back

Weight = mass × gravity = 10 kg × 9.8 m/s² = 98 N.

Front

If an object weighs 30 N on Earth, what is its mass?

Back

Mass = weight / gravity = 30 N / 9.8 m/s² ≈ 3.06 kg.