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Laws of motion
Key terms and definitions about Newton's laws of motion
Question | Answer |
---|---|
What is Newton's first law of motion? | An object at rest remains at rest. and An object in motion remains in motion. |
What is Inertia? | The tendency of an object to remain at rest or in motion unless a force acts on it. |
What is Newton's second law of motion? | The acceleration of an object depends on the mass of the object and the size of the force applied. |
What is the equation for acceleration? | Acceleration=force/mass |
What is Newton's third law of motion? | When a force is applied to an object, the object exerts an equal force in the opposite direction. |
What is Momentum used for? | Momentum is used to find the force needed to stop a moving object. |
True of False. If there is a heavy object in a wagon going down a slope, the acceleration of the wagon will be fast. | False. |
Why do you slow down and stop when you coast on a bike? | Friction causes the bike to slow down and eventually stop. |
A fireman turning on the hose gets pushed backwards by the water flowing out is what law of motion? | Newton's Third law. |
Rolling a bowling ball which results in a strike uses what law of motion? | Newton's First Law. |
Between kicking a soccer ball and kicking bowling ball with the same force and having the soccer ball go a lot further is example of what law of motion? | Newton's Second Law |
When pushing a toddler and an adult on a swing with the same force but having the toddler go twice as high as the adult is an example of what law of motion? | Newton's Second Law |
Jumping off the ground, is an example of what law of motion? | Newton's Third Law |
If there is a card accident between a semi truck and a car, the car will have the worst damage. Why? | The semi truck needed more momentum to stop because of it has more mass. |
What happens to objects when two balanced forces act on it? | The object remains at rest. |