1. Calculate the weight of a girl who has a mass of 40kg.

2. What is the gravitational force acting on a 30g rock on the Earth’s surface?

3. Find the mass of a boy who weighs 550N.

4. During the Apollo 11 expedition to the Moon, 21 kg of soil samples were brought from the Moon to the Earth. The gravitational field strength was not constant throughout the journey.

(a) What is meant by gravitational field strength?
(b) Copy and complete the table to show the mass and weight of the soil samples at various stages of the journey.

 

5. An astronaut on the Moon uses a newton balance to measure the weight of a 20kg rock.
If the reading on the balance is 32N, calculate the gravitational field strength on the Moon.

6. The gravitational field strength on Venus is 8.8Nkg^-1. If a robot probe of mass 270kg lands on Venus, how much will it weigh?

7. If a man weighs 700N on Earth, how much would he weigh on Jupiter which has a gravitational field strength of 26Nkg^-1?