# Shared Flashcard Set

## Details

Physics and Human Affairs Test #2
N/A
20
Physics
03/10/2014

Term
 Force
Definition
 A body exerts a force on another body when the first body causes the second force to accelerate.
Term
 Compared to the Moon, falling objects have more acceleration on Earth, neglecting drag. A grapefruit has a 1 kg mass. Suppose we take tghis grapefruit to the Moon. The force of gravity on the grapefruit will then be...
Definition
 less than 10 newtons
Term
 A certain grapefruit on Earth has a mass of 1 kg and a weight of 1 newton. When the grapefruit is on the Moon its mass is...
Definition
 one kilogram
Term
 Suppose we subject a golf ball and a more massive lead ball to identical net forces. Then compared to the golf ball, the lead ball must have....
Definition
 a smaller acceleration
Term
 One third as much net force is exerted on object A as on object B. The two objects have the same mass. How do their accelerations compare?
Definition
 Object A has one third as much acceleration as object B
Term
 After a brief push, a block of wood slows down as it slides east along a tabletop. As the block slides...
Definition
 its acceleration is toward the west
Term
 Is any force exerted on you when you slow down while moving along a straight line?
Definition
 Yes there is a backward force on you, opposite to your direction of motion
Term
 You push your 2 kg physics book along a tabletop, pushing it with 10 N of force. The frictional force on its a 4 newtons. The book acceleration is...
Definition
 3 m/s2
Term
 Which of the following is part of a force pair with your weight?
Definition
 The gravitational force by your body pulling upward on Earth
Term
 When you pull an object, such as a table, across the floor, the forward force by you on the table is equal but opposite to the backward force by the table on you. It seems as though these two forces should balance out, so that the table can't be moved. However, the table does move because...
Definition
 only one of these two forces actually acts on the table
Term
 A rocket taking off straight upward develops 10,000 Newtons of thrust. The rocket weighs 2000 newtons. The net force on the rocket, neglecting air resistance is....
Definition
 8000 Newtons
Term
 An auto travels down a straight, level road at constant speed. One force that acts on the auto is...
Definition
 the normal force of the road pushing upward on the auto
Term
 How is the gravitational force between two objects affected by changes in the masses of the objects and by changes in the other objects?
Definition
 The force increases with increased mass, and decreases with increased distance
Term
 An astronaut's weight is 600 N at the surface of the Earth. How much will she weigh while orbiting in a satellite 12,000 km above the surface?
Definition
 150 Newtons
Term
 Suppose that the gravitational force by the Earth on the Moon suddenly shut off. How would the Moon then move?
Definition
 It would move straight ahead in a straight line, at constant speed
Term
 Imagine that you could magically move the Moon closer to Earth, so that the distance from Earth to Moon is cut in half. This would cause the Earth exerts on the Moon to be...
Definition
 increased to four times its original value
Term
 Suppose we could magically triple the distance between Earth and the Moon. This would cause the gravitational force by Earth on the Moon to be....
Definition
 reduced to 1/9 of its former value
Term
 When you are in a high flying jet plane, does either your weight of your mass differ from their normal value as measured on the ground?
Definition