Gravity/Motion 1
Air Resistance slows down _________
acceleration
________ is a measure of gravitational force.
weight
What is Newton's first law of motion?
an object stays at rest/in motion unless acted on by an unbalanced force.
Formula for force is _______
mass times acceleration
All forces act in ______
pairs
all objects fall with the _____ acceleration.
same
free fall can occur only in a _______.
vacuum
Give an example of the first law in action.
varies!
the acceleration of an object depends on the mass of the object and the amount of force applied.
define Newton's 3rd Law of Motion
When one object exerts a force on a second object, the second object exerts an equal and opposite force.
all objects accelerate toward Earth at a rate of _____________
9.8 m/s/s
What is an orbit?
path following the curve of an object. ex: the Earth's surface.
_________ is a common unbalanced force that acts to stop motion.
friction
What force is necessary to accelerate a 1250 kg car at a rate of 40 m/s/s?
50,000 N
How is water rushing out of a fire hose an example of the third law?
water rushes forward- reaction force pushes backward on the hose.
air resistance is determined by _______ and _________ of an object.
size and shape
the orbit of the space shuttle around Earth is an example of _______ _______.
projectile motion
Inertia is related to ______
mass
a full shopping cart requires _____ force to accelerate it.
more
Define momentum
a property of a moving object that depends on the object's mass and velocity.
air resistance stops at the ______ ________.
terminal velocity
______ is the unbalanced force that causes objects to move in a circular path.
centripetal force
Inertia is ___________
the tendency of all objects to resist any change in motion.
Name two ways to increase the acceleration of an object.
varies
How do you calculate momentum?
p= mxv