True or false? Work is done when an object is moved by a force.
Answer
True
False
Question 2
Question
True or false? Work uses a different SI unit to energy.
Answer
True
False
Question 3
Question
True or false? Gravitational potential energy is energy stored in an object because of its position in the Earth's gravitational field.
Answer
True
False
Question 4
Question
What is the gravitational potential energy of an object of 0.5kg mass if it is lifted by 3m?
Answer
1.5J
3J
15J
10.5J
Question 5
Question
What is the power developed of an object which, when lifted, gains 60J in 10s?
Answer
600W
6W
60W
Question 6
Question
True or false? Kinetic energy is the energy of an object when it is stationary.
Answer
True
False
Question 7
Question
True or false? Momentum is a scalar quantity.
Answer
True
False
Question 8
Question
True or false? In a closed system, the total momentum before an event is equal to the total momentum after the event.
Answer
True
False
Question 9
Question
Trolley A, 6kg, is travelling in one direction at 4m/s. Trolley B, 7kg, is travelling in the other direction at 3m/s. The two trolleys stick together and move off. What is the velocity of the two trolleys?
Answer
2.5m/s
3m/s
3.5m/s
4m/s
Question 10
Question
True or false? In an explosion, the total momentum is zero.
Answer
True
False
Question 11
Question
True or false? If, in an explosion, two pieces of debris move apart, they will not move with equal and opposite momentum.
Answer
True
False
Question 12
Question
True or false? If the impact time is increased, the impact force will be increased.