What force is caused by gravity?
Mass
Weight
Downforce
What is the gravitational field strength of Earth?
10 N/kg
1.6 N/kg
25 N/kg
How is gravity force, or weight, calculated?
Gravity force = mass × gravitational field strength (g)
Gravity force = gravitational field strength (g) ÷ mass
Gravity force = mass ÷ gravitational field strength (g)
What is the gravity force, or weight, of a 40 kg child on Earth?
40 kg
4.1 N
400 N
What is the relationship between weight and mass?
Weight is directly proportional to mass
Weight is inversely proportional to mass
Weight is not proportional to mass
What is a Newton meter?
A unit for work done
A calibrated spring-balance
A unit for weight
A rock of mass 12.5 kg has a weight of 20 N on the Moon. What is the value for gravity on the moon?
0.6 N/kg
1.2 N/kg
Why is the Earth’s gravitational field greater than the Moon’s?
Because the Earth is nearer to the Sun
Because the Earth has a greater mass than the moon
Because the Earth is moving more quickly through space
Calculate the energy transferred to the gravity store when a man of mass 80 kg climbs 5 rungs up a ladder. Each rung is 10 cm high.
400 J
80 J
40,000 J
Calculate the energy transferred to the gravity store when a 2,000 kg rocket is launched from the Moon to a distance of 100 km away. On the Moon, g is 1.6 N/kg.
320 J
32 kJ
320 kJ