2e Force and Motion V

An object is falling in a vacuum. Which of the following quantities of the object does not change along the motion?

A stone is launched vertically upwards with an initial velocity of 10 ms⁻¹. If air resistance can be neglected, find the maximum height reached by the stone. ( Gravitational acceleration, g = 10 ms⁻² )

Given that the gravitational field strength on the Earth and Moon is 9.81 Nkg-1 and 1.64 Nkg-1 respectively, If the weight of an object is 2943N on the earth, what is its weight on the Moon?

The gravitational field strength on the Moon is about 6 times less than that on the earth. If the weight of a man is 820N on the earth, what will be his weight on the Moon?

An astronaut found that his weight is lower on the surface of moon compare to the surface of the earth. This is due to

The diagram shows a man standing on a balance inside a lift. If the mass of the man (with his bag and umbrella) is 75kg, find the reading of the balance when the lift is moving downward at a deceleration of 8ms^-2.

The diagram shows a man standing on a balance inside a lift. If the mass of the man (with his bag and umbrella) is 75kg, find the reading of the balance when the lift is moving upward at a deceleration of 2ms^-2.