Newton's 1st Law
of Motion
of Motion
Newton's 1st law of motion is also known as the law of...
Inertia
What is the equation to solve for force?
F=
F=M x A
Newton's 3rd law of motion states that for every action, there is a(n) _________, but _________ ____________.
equal, opposite, reaction
A person driving without a seat belt and he bumps into a wall, he will fly over the wall since there is nothing to stop this force (such as a seat belt)
1st Law
<---------------- ----->
16 N 5N
What is the net force?
11 N to the Left
An object at rest will stay at rest, and an object in motion will stay in motion, unless acted upon by a(n) ____________________________.
Unbalanced force
What is the equation to solve for mass?
M=
M= F/A
Forces always come in _________.
pairs
It takes less force to move a pencil than a desk.
2nd Law
Which object will accelerate the fastest?
A. A ball with a mass of 7 kg, and a force of 10 N
B. A ball with a mass of 10 kg, and a force of 12 N
A. A ball with a mass of 7 kg, and a force of 10 N
What is the force that acts against an object in motion?
Friction
What is the equation to solve for acceleration?
A=
A= F/M
What is the action force when a rocket launches?
The gases push down towards the ground.
A heavy person may kick the ball higher because the heavy person has more mass
2nd Law
A 9 kg mass accelerates to the left at 12 m/s2. What is the force pulling on the mass?
F= 108 N
What would happen to motion if friction did not exist?
Objects would never stop moving if friction did not exist.
If the mass of an object increases, will it be easier or more difficult to move?
More difficult
What is the reaction force when a rocket launches?
The force on the rocket that causes it to move upwards.
If air is let out of a balloon quickly, air pushes down & balloon goes up
3rd Law
An object is moving to the right with a force of 65 N and an acceleration of 6.2 m/s2. What is the mass of the object?
M= 10.48 kg
Inertia is the _____________________________, including changes to speed, direction, or state of rest. (Look at your notes!)
resistance of change in motion
Acceleration occurs when a(n) __________ acts on a mass.
force
You hit a wall with a stick. The equal but opposite reaction is ____________.
The wall pushes against the stick.
A fireman turns on his hose & is knocked backwards
3rd Law
A child is pushing their scooter with a force of 10 N, however there is a frictional force of 4 N. The mass of the child & scooter is 55 kg. What is the acceleration of the scooter?
F= 10N-4N= 6N M=55kg
A= F/M = 6N/55kg= 0.11 m/s2