A rock falls off a cliff onto a beach. The effect of air resistance on the rock is negligible. Which row describes the acceleration and speed of the rock as it falls?
B
A sphere P, made of steel, has a weight of 10 N on Earth. Another sphere Q, also made of steel, has a weight of 10 N on Mars. The gravitational field strength on Earth is greater than the gravitational field strength on Mars.
B
An object in a space probe above the Earth weighs 3.5 N. The gravitational field strength at the height of the space probe is 7.0 N / kg. The gravitational field strength on the Earth’s surface is 9.8 N / kg.
B
An object falls towards the surface of the Earth. The object is falling at its terminal velocity. Which statement is correct?
B
A light ball is held at rest at the top of a tall cliff. It is released and falls through the air, eventually reaching its terminal velocity. Which row describes the behaviour of the ball as it descends?
C
Which statement about a falling object accelerating close to the Earth’s surface is correct?
C
Which row shows the mass and the weight of an object near the Earth’s surface?
C
The gravitational field strength on the Moon is smaller than that on the Earth. A scientist examines a rock which has been brought back from the Moon.
A
