Friction
What is Friction?
The force that opposes sliding between two forces.
1 meter is equal to how many Jules?
1J
Impulse is equal to what?
Is momentum a vector or scaler?
Vector
What is Newton’s first law?
An object in motion stays in motion until an outside force stops it.
What is the formula for the force of friction?
Ff = μFn
Is energy a vector or scalar?
Scalar.
What is the formula for Momentum?
p = mv
Is impulse a vector or a scalar?
What is Newton’s second law?
Fnet = ma
What force between surfaces affects the amount of friction?
Normal force.
What’s the definition of work?
The energy transferred when a force causes an object to move (displace) in the direction of that force
What is the formula for Impulse?
J = Fnet = Change in momentum
Is friction a vector or a scalar?
Vector.
What is Newton’s third law?
If an object exerts a force onto another object that object exerts the same force onto the first object but in opposite direction.
Friction converts mechanical energy mostly into what other form of energy?
Thermal(heat) energy.
What’s the formula for work?
W = Fd
Which has more momentum: a fast moving car or a slow moving truck?
A slow moving truck.
What is a vector?
A quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.
If you double the force applied to an object but keep its mass the same, what else double?
Acceleration
Friction occurs because of microscopic ___ between surfaces.
Irregularities or bumps/ridges
This theorem states that work equals the change in this quantity
Kinetic energy
A 5 kg object changes velocity from 2 m/s to 6 m/s. What is the impulse?
20 N/s
What is a scalar?
a quantity having only magnitude, not direction.
When you jump off a small boat, the boat moves backward because of which law?
Newton’s third law.