Force
The sum of all the forces acting on an object.
What is net force?
The force of fluid friction opposes the motion of an object through a
What is fluid?
the force of gravity on an object
What is weight?
The tendency of an object to resist any change in its motion. Also called Newton's First Law of Motion
What is inertia?
This friction force opposes the motion of objects that move through the air. e.g. a feather
What is air resistance or fluid friction?
Electromagnetic force is associated with this
What is charged particles?
If friction could be removed (think - outer space), an object in motion would
continue to move in a straight line at a constant speed
Weight (in Science) calculated in ________
Newtons (N)
It is easier to push a 40kg ball than a 400kg ball. This is an example of Newton’s _____________
Second Law of Motion
True or False: When a basketball is bounced, the action is the upward movement of the ball.
False. Reaction.
in a tug of war, when one team is pulling with a force of 100 N and the other 80 N, what is the net force?
20 N
the two types of friction
What is static and kinetic friction?
True or False: The gravitational force exerted on an object is weight.
True
A ball rolling down a hill will continue to roll unless friction or another force stops it. This is an example of Newton’s _____________
First Law of Motion
You are riding a bicycle and it suddenly stops. What happens to you?
You continue to move forward.
This happens to an object if the forces are unbalanced.
The object moves
Friction always acts______________ the direction of motion of an object.
What is the opposite?
If you were no longer on Earth, ________ would remain the same; however, _________ would change with gravity.
What are mass and weight?
To calculate the force an object exerts, you use this formula.
What is F = ma?
Which law describes what happens when a tablecloth is pulled out from under a setting of china without damaging it?
First Law of Motion
How big is the net force acting on an object with constant velocity?
0 N
The curved path of an object is an example of this type of motion?
What is projectile motion?
The force of attraction between any object and every other object in the universe is called__________.
gravitational pull
Releasing a balloon full of air has an equal and opposite reaction. This is an example of Newton’s ________________.
Third Law of Motion
Momentum is the product of what?
What is mass and velocity?