1) What is gravity? a) A force of attraction between the Earth and any other object. b) A force of attraction between any planet and any other object. c) A force of attraction between two objects. d) A force of attraction between two objects with air between them. 2) What is velocity useful for? a) To know how fast an object travels. b) To know the direction and speed of an object. c) To discover which object will reach the same place first. d) To discover the relationship between gravity and speed. 3) What is speed? a) The speed it gains the object while travelling b) How fast an object can move between time and space c) How fast an object moves over time d) The acceleration in time over space 4) What is acceleration caused by? a) A force interacting with an object. b) A boost on an object’s speed by gravity c) A change of speed in a person. d) A change on Earth’s speed. 5) What happens if I throw two different objects at the same height and time? a) They will land at the same time b) They will land at the same time but different places c) The object with more gravitational potential will land first d) The object with less gravitational potential will land first 6) What was Galileo’s experiment for? a) To determine the weight of the balls due to the gravity. b) To determine the height of the balls due to the gravity. c) To determine the acceleration of the balls due to the gravity. d) To determine the speed of the balls due to the gravity. 7) Which was Newton’s force formula? a) F = (G/d2).m1.m2 b) F = (G/d2)(m1.m2) c) F = (G.m1.m2)/d2 d) None of them. 8) What did the Cavendish experiment measure? a) It measured the weight of different objects b) It measured the acceleration of an object in motion c) It measured the velocity of an object falling d) It measured the universal gravitational constant 9) What is the difference between mass and weight? a) Mass is a force while weight is a property of objects. b) Mass is a property of objects while weight is a force c) They are actually the same. d) None of them. 10) In Galileo's ramp experiment, what is the water measuring? a) Space. b) Time. c) Acceleration of gravity. d) The length of the ramp.

Dynamics

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？