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Physics Force 3
Question | Answer |
---|---|
Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude, but in the opposite direction to that of the first object. (Always - True, False, Sometimes true) | Always True |
Forces always occur ___________ | in pairs |
An archer shoots an arrow. Consider the action force to be the bow string against the arrow. What is the reaction to this force? | The arrows push against the bow string |
A player hits a ball with a bat. The action force is the impact of the bat against the ball. What is the reaction to this force? | The force of the ball against the bat. |
As a ball falls, the action force is the pull of the earth's mass on the ball. What is the reaction to this force? | The pull of the balls mass on the earth |
A person is attracted towards the center of the earth by a 500N gravitational force. The force with which the earth is attracted toward the person is ________ | 500N |
An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is what? (Smaller, larger, same?) | The same |
An unfortunate bug splatters against the windshield of a moving car. Compared to the deceleration of the car, the deceleration of the bug is what? (Smaller, larger, same?) | Larger |
If a horse pulls on a wagon at rest, the wagon pulls back equally as much on the horse. Will the wagon be set into motion? | Yes, because there is a net force acting on the wagon. |
A Mack truck and a Volkswagen traveling at the same speed have a head-on collision. Which vehicle will undergo the greater change in velocity? | The Volkswagen |
Bronco the skydiver falls toward the earth. The attraction of the earth on Bronco pulls him down. What is the reaction to this force? | Bronco pulling up on the earth |
A rocket is able to accelerate in the vacuum of space when it fires its engines. The force that propels the rocket is the force of the ________ on the ______________ | exhaust gases on the rocket |
A woman weighing 500N sits on the floor. She exerts a force on the floor of __________ | 500N |
Two people pull on a rope in a tug-of-war. Each pulls with 400N of force. What is the tension in the rope? | 400N |
Two people, one having twice the mass of the other, play tug-of-war with a 12 meter rope on frictionless ice. After a brief time, they meet. How far does the heavier person slide? | 4m |
ToF: Whenever one object exerts a force on another object, the second object always exerts a force back on the first object. | True |
ToF: A rocket ship is pushed forward by gases that are forced out the back of the ship. | True |
ToF: In order to make a cart move forward, a horse must pull harder on the cart than the cart pulls on the horse. | False |
ToF: A bicycle and a parked car have a head-on collision. The force of impact is greater on the bicycle. | False |