Physics 9702/42 — May/June 2015
Cambridge A-Level · A Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Quantum Physics · Communication · Gravitational Fields · Motion in a Circle · Ideal Gases · Temperature · +7 more
The Earth may be considered to be a uniform sphere of radius with its mass of concentrated at its centre. The Earth spins on its axis with a period of 24.0 hours.
A stone of mass 2.50 kg rests on the Earth’s surface at the Equator.
- Calculate, using Newton’s law of gravitation, the gravitational force on the stone.
gravitational force = ______
- Determine the force required to maintain the stone in its circular path.
force = ______
The stone is now hung from a newton-meter.
Use your answers in (i) to determine the reading on the meter. Give your answer to three significant figures.
reading = ______
A satellite is orbiting the Earth. For an astronaut in the satellite, his sensation of weight is caused by the contact force from his surroundings.
The astronaut reports that he is ‘weightless’, despite being in the Earth’s gravitational field.
Suggest what is meant by the astronaut reporting that he is ‘weightless’.
The rest of this paper
11 more questions- Q2Ideal Gases4M
- Q3Temperature8M
- Q4Oscillations9M
- Q5Electric Fields11M
- Q6Quantum Physics10M
- Q7Magnetic Fields · Alternating Currents8M
- Q8Quantum Physics · Nuclear Physics11M
- Q9Electronics8M
- Q10Medical Physics9M
- Q11Communication9M
- Q12Communication4M