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topic 2, ex. 2
newton laws
| Question | Answer |
|---|---|
| Newton’s first law of motion (Law of Inertia) | A body at rest will remain at rest, and a body in motion will stay in motion unless acted upon by an unbalanced force |
| Newton’s second law of motion (force and acceleration) | law of motion stating that the amount of force applied to an object is equal to the product of the object’s mass and its acceleration. |
| Newton’s third law of motion (action and reaction) | For every action, there is a equal and opposite reaction Ex. when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air |
| how do force and mass relate to each other | they are directly related (when one increases, the other increases) |
| how do force and acceleration relate to each other | they are inversely related (when one increases, the other decreases) |
| example of newton's 1st law in bumper cars | When the cars collide, the cars change course but the drivers’ bodies continue in the same direction due to inertia |
| example of newton's 2st law in bumper cars | The sideways acceleration of this car is determined by the force from the collision and its own mass |
| example of newton's 3st law in bumper cars | As the driver moves forward due to inertia, they push forward on the tight seatbelt. The belt exerts a backwards force on the driver that keeps them from flying out of the car |
| example of newton's 1st law in rockets | When the rocket first ignites, it takes a few seconds for the thrust to overcome the rocket’s inertia, so it doesn’t move right away |
| example of newton's 2st law in rockets | If the force of the thrust (force made by the engine + fire) is constant, then as the rocket’s mass decreases (going into space), the rocket will accelerate faster and faster |
| example of newton's 3st law in rockets | The pressure inside the rocket pushes the fuel out, while the thrust from the escaping fuel pushes the rocket forward |
| how do acceleration and mass relate to each other | they are inversely related (when one increases, the other decreases) |
Created by:
aye.grace
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