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Newton study guide
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Question | Answer |
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What is Newton’s First Law of Motion? | An object at rest remains at rest, and an object in motion remains in motion, unless acted upon by an unbalanced force . |
According to Newton’s First Law of Motion, why would a student on roller skates eventually stop moving? | A student on roller skates must have hit something or it had no energy left. |
What is inertia? | Inertia is to change motion. More massive more inertia. |
Why do roller coasters need to have a lap bar or shoulder bar? | So the people won’t fall of the roller coaster when they are going fast. |
Which boxes will move? Which boxes will not move? | The boxes that will move are Box 1, Box 2, and Box 3. Box 4 won’t move. |
Show the net force calculation for each box. | Box 1= 8N+0=8N Box 2= 5N-2N=3N Box 3= 6N+6N+6N= 18N Box 4= 7N - 3N+4N = 0N |
What is Newton’s Second Law of Motion? | Acceleration is produced when unbalanced forces act on a mass |
What is acceleration? What causes acceleration? | A change in the speed OR direction of motion. Cause by a unbalanced force. |
What is Newton’s Third Law of Motion? | For every action , there is an equal but opposite reaction |
A basketball hits the floor with a force of 50N. What is the force and direction exerted by the floor on the ball? | The force of the ball hitting the floor. |
What forces cause a rollerskater to move? | The roller skates moving backwards |