What is the constant velocity of a falling object when it cannot accelerate faster
100
________________ is the motion of a body when only gravity is acting on it
What is free fall
100
Which falls faster, a feather or an apple?
What is a feather. Acceleration is decreased due to sir resistance. They do not land at the same time
100
What is the formula for velocity
What is v=g x t
100
Who questioned Arsitotle's idea about falling objects?
What is Galileo
200
What is the acceleration due to gravity on earth
What is 9.8m/s2
200
What keeps the moon in orbit?
What is centripetal force
200
Define projectile motion
What is curved path an object follows when thrown, launched, or otherwise projected near the surface of Earth.
200
Name 3 examples of projectile motion.
What is frog leaping, water sprayed by a sprinkler, swimmer diving, balls being juggled, arrow shot by an archer, etc.
200
How is the acceleration of an object affected by gravity?
What is it is being pulled down which adds force to the object.
300
If you were to drop a feather and a rock at the same time ON THE MOON, what would happen.
What is due to the lack of gravity, they would hit the surface at the same time.
300
Name newton's first low of motion
What is "An object at rest will stay at rest, and an object in motion will stay in motion at a constant speed and in a straight line unless acted upon by an outside force."
300
What is another name for the first law of motion?
What is law of inertia
300
Why does a desk stop quickly when it's pushed?
What is friction
300
Which will fall faster: an unscathed paper or a crumpled up paper
What is crumpled because it decreases the air resistance
400
Mass is a measure of _________
What is inertia
400
True or false: a cart will continue in the same direction unless acted upon by air
What is false
400
What is Newton's second law of motion
What is the acceleration of an object depends on the mass of the object and the amount of force applied.
400
What is the force of an object that has a mass of 4kg and is going at a speed of 7.5km/s2?
What is 30N
400
What is the formula for acceleration?
What is f/m
500
What is Newton's 3rd law of motion?
What is whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first
500
Name the example the book gave bout the 3rd law.
What is a swimmer
500
Forces __________ act on the same object
What is do not
500
Define inertia
What is the tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction until an outside force acts on an object.