1. Which pulls harder gravitationally, the Earth on the Moon or the Moon on the Earth? Which accelerates more? a) The Earth on the Moon; The Earth b) The Earth on the Moon; The Moon c) The Moon on the Earth; The Earth (1) The Moon on the Earth; The Moon e) Both the same; The Earth f) Both the same; The Moon 2. Two satellites, A and B, both having the same mass are orbiting the earth in circular orbits. The distance of satellite B from the Earth's centre is twice that of satellite A. What is the ratio of the speed of B compared to that of A (hint: use the satellite equations). a) 1/2 b) 1/: c) 1 d) e) 2 3. You throw a ball straight up. Compare the Sign of the work done by gravity on the ball on the way up with the Sign of the work done by gravity on the ball on the way down. a) Work is i on the way up and + on the way down b) Work is i on the way up and i on the way down 0) Work is + on the way up and + on the way down (1) Work is + on the way up and i on the way down 4. According to the Work-Kinetic Energy Theorem, if the net work done on an object is zero, then the obj ect's kinetic energy a) Decreases b) Remains the same 0) Increases d) Is zero. 5. A car accelerates from rest to 30 km/h. Later, on a highway, it accelerates from 30 km/h to 60 km/h. Which takes more energy, going from 0 to 30, or from 30 to 60? a) 0 to 30 km/h b) 30 to 60 km/h 0) Both are the same 6. (5 marks) You are helping your friends plan a socially-distanced back yard party and are pushing a 63.5 kg keg of beer across the ground. You push the keg horizontally and at constant velocity and you push it 10.3 rn across a rough oor from the entrance of the house to the patio. The coefcient of kinetic friction is 0.50 between the keg and the oor is 0.50. How much work do you do pushing the keg