1st Law
The first law is also called....
Law of Inertia
Force equal what ___ times ____?
Mass times acceleration
What is Newtons 3rd law?
For every action there is an equal and opposite force.
How many types of friction are there?
Four
What is inertia?
The tendency of an object to resist changes in its velocity.
An object at rest will stay at rest until acted upon.
Newtons first law
The net force of an object is equal to the product of its mass and acceleration.
Equal and Opposite
Force and direction
The first type of friction.
Sliding friction
Somebody body moving to the side of the car when taking a sharp turn?
Newtons 1st law
What is an example of an unbalanced force?
Kicking a football, tug of war, etc.
An object with a mass of 1500g accelerates 10.0 m/s^2 when an unknown force is applied to it. What is the amount of the force?
15N
Dave is riding his skateboard and pushes off the ground with his foot. This causes him to accelerate at a rate of 4 m/s^2. Dave weighs 589 N. How strong was his push off the ground?
240N
The second type of friction.
Rolling friction
What is an example of sliding motion?
Ice skating
What is something at rest?
Basketball sitting still, golf ball not hit yet, etc.
An object with a mass of 5.0 kg accelerates 8.0 m/s^2 when an unknown force is applied to it. What is the amount of the force?
40N
Two cars, one of mass 500kg and one of mass 250kg, collide head on. The car with more mass experiences a __ force and a __ acceleration with respect to the the smaller car.
equal... smaller
The third type of friction?
Fluid friction
What is an example of rolling friction?
Bowling
What is velocity?
Quantity that designates how fast and in what direction a point is moving.
An object with a mass of 2000 g accelerates 8.3 m/s^2 when an unknown force is applied to it. What is the amount of the force?
16.6N
A book exerts a force of 2N downwards, into a chair that exerts a force of 5N downwards to the floor it stands on. What is the force that the floor exerts upwards on the chair?
What is the fourth type of friction?
Static friction
What is an example of fluid friction?