Forces
Friction
What is it
Momentum and stuff
stuff
100
Forces can be added together only if they are
What is acting on the same object
100
The force that one surface exerts on another when the two rub against each other is called
What is friction
100
The force of gravity on a person or object on the surface of a planet is called
What is weight
100
The greater the mass of an object,
What is the greater its inertia
100
The total momentum of a group of objects is conserved unless
What is outside forces act on object
200
A push or pull is a
What is force
200
What is an example of rolling friction?
What is bike tires on a road, a ball, etc
200
The law of universal gravitation states that any two objects in the universe, without exception,
What is attract eachother
200
According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, the nail
What is an equal force is pushed back onto the hammer
200
The achievement of lifting a rocket off the ground and into space can be explained by which law
What is newtons third law
300
What happens when two forces act in the same direction?
What is they add together
300
Air resistance is a type of
What is friction
300
The amount of matter in an object is called its
What is mass
300
The product of an object’s mass and velocity is called its
What is momentum
300
What is required for a rocket to lift off into space?
What is thrust that is greater then earths gravity
400
Balanced forces acting on an object
What is never change the objects motion
400
Objects falling through air experience a type of friction called
What is air resistance
400
When the only force acting on a falling object is gravity, the object is said to be
What is in free fall
400
The momentum of an object is in the same direction as its
What is velocity
400
An object that travels around another object in space is called a(n)
What is satelite
500
Which type of elastic force is present in the strings on a guitar?
What is tension
500
A(n) ____________________ is an object that is thrown.
What is projectile
500
The tendency of an object to resist change in its motion is known as
What is inertia
500
According to the law of conservation of momentum, when two objects collide in the absence of friction,
What is momentum is lost
500
A measure of an object’s ____________________ is a measure of the object’s inertia.
What is mass
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