3.1 Mass and Weight 2020J

What happens to the mass and to the weight of the flexible material when it is compressed?

• mass increases, weight increases

• mass increases, weight no change

• mass no change, weight increases

• mass no change, weight no change

On the Moon, the gravitational field strength g is 1.6 N/kg.

An object has a mass of 2.0 kg.

What is the weight of the object on the Moon?

• 0 N

• 1.3 N

• 3.2 N

• 20.0 N

A student drops a ball from a high window. The mass of the ball is 0.12 kg.

Calculate the weight of the ball.

• 1.2 N

• 0.12 N

• 12 N

• 0.98 N

Two metal blocks P and Q have identical dimensions.

They hang on identical spring balances.

Which statement about P and Q is correct?

• They have different volumes and different weights.

• They have different volumes and equal weights.

• They have equal volumes and equal weights.

• They have equal volumes and different weights.

A mass of 6.0 kg rests on the surface of a planet.

On this planet, g = 20 N/kg.

What is the weight of the object?

• 0.30 N

• 0.60 N

• 60 N

• 120 N

A space probe is taken from the Earth to Mars.

The force of gravity on the surface of Mars is less than the force of gravity on the surface of the Earth.

How do the weight and the mass of a space probe on the surface of Mars compare to their values when the probe is on the surface of the Earth?

Water has a density of 1000 kg/m³.

A rectangular swimming pool has an average depth of 1.6 m.

The length of the pool is 25 m. The width of the pool is 10 m.

What is the mass of the water in the swimming pool?

• 2.5 kg

• 400 kg

• 400 000 kg

• 800 000 kg

Which row gives the correct weight for the mass shown?

The value of g is 10 N/kg.

A rectangular gymnasium is 50 m long, 25 m wide and 8.0 m high.

The density of air is 1.2 kg/m³.

What is the best estimate of the mass of air in the gymnasium?

• 0.00012 kg

• 100 kg

• 8300 kg

• 12 000 kg

Which statement correctly describes the effects of placing a heavy load in a car?

• It is easier to accelerate the car and easier to bring the car to rest.

• It is easier to accelerate the car but more difficult to bring the car to rest.

• It is more difficult to accelerate the car and more difficult to bring the car to rest.

• It is more difficult to accelerate the car but easier to bring the car to rest.