Newtons First Law
What is Newtons First Law?
An object at rest will stay at rest and an object in motion with stay in motion (with the same velocity) unless acted upon by an unbalanced force.
What is Newtons Second Law?
Force is equal to the objects mass times acceleration.
What is Newtons Third Law?
For every action, there is an equal and opposite reaction.
What is the SI unit for Force?
Newton (N).
What is a push or a pull on an object?
Force.
What is Newton's First Law also referred to as?
The Law of Inertia.
As acceleration increases, what happens to the force of the object?
Also increases.
Pairs.
What is the SI unit for Weight?
Newton (N).
What is a force that opposes the motion of an object?
Friction.
What is inertia?
Property of matter that resists changes in motion.
As mass increases, what happens to the force of an object?
Decreases.
What is the reaction force when a tennis racket strikes a tennis ball?
The tennis ball fly's through the air.
What is the SI unit for acceleration?
Meters per second squared (m/s2).
When a pair of balanced forces act on an object, what is the net force?
Zero.
Inertia.
Calculate the force on a 3 kg exercise ball that has an acceleration of 10 m/s2.
30 N
When a 2 kg shot put leaves an athletes hand it has a velocity of 12 m/s. What is the momentum of the shot put?
24 kgm/s
What is the SI unit for Momentum?
Kilograms meters per second (kgm/s).
What happens to an object when unbalanced forces act on it?
The object moves or accelerates.
What is the difference between mass and weight?
Weight includes the force of gravity. Weight will change when gravity changes but mass will not.
An athlete throws a 1 kg ball with a force of 5 N. What is the acceleration of the ball?
5 m/s2
What is conserved when two objects collide?
Momentum.
What does the Newton unit also equal?
What is the force that keeps an object moving in a circle?