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What is Newton’s 1st law?
An object at rest stays at rest, and an object in motion stays in motion
What is Newton’s 2nd law?
Law of Acceleration (F = MA)
What does the “F” stand for in the equation “F = MA?”
Force
What is the unit for acceleration?
Meters per second squared (m/s^2)
What measurement do Newtons represent?
Force
What is Newton’s 3rd law?
For every action there is an equal and opposite reaction
Two objects with different weights are hit with the same amount of force, will the lighter or heavier object have more acceleration?
The lighter object
A ball rolls down a hill, where does it have the most potential energy?
The top of the hill
Why do objects on ice slider further than objects on dirt?
Ice has less friction
Name two types of energy related to physics
A rollercoaster drops down its track, where does it have the most kinetic energy?
The bottom of the drop
What is inertia
An object's resistance to change
What force is required to get a 1000kg car to accelerate to 15m/s^2?
15000N
What is mass?
The amount of matter in an object
What is the net force on an object being pushed with 16N of force from the left, and 18N of force from the right?
2N to the right
A ball bounces off of the ground, this is an example of which of Newton’s Laws?
Newton's Third Law
What is the acceleration of gravity?
9.81m/s^2
What is the difference between acceleration and velocity?
Acceleration is how fast something is speeding up, velocity is a constant speed
Satellites orbiting the Earth do not slow down, this is an example of which of Newton’s Laws?
Newton's First Law
What happens to an object when balanced forces act on it?
Nothing
You’re standing on a scale in an elevator, and the elevator begins to move up. Does the weight on the scale increase, decrease, or stay the same, and why?
The weight would increase, since the elevator is moving up against you, Newton’s third law states you push back against the scale with equal force, increasing the weight.
Newton’s 1st law states that an object in motion stays in motion, so why do objects on Earth stop moving?
Friction
A golf ball weighing 500 grams is hit with 20N of force, what is the acceleration of the ball?
40m/s^2
Two objects with the same size and shape are dropped from the same height at the same time. One object weighs 5kg, the other weighs 1kg, which will hit the ground first?
Neither, they will hit the ground at the same time as the acceleration of gravity is constant regardless of mass
Why does a feather fall slower than a rock on Earth, but at the same speed on the Moon?
Air Resistance/Friction