Force
The sum of all the forces acting on an object.
What is net force?
This is the force that opposes the sliding motion of two surfaces that are touching each other. e.g. rock rolling down a hill
What is friction?
This force attracts objects with mass.
What is gravity?
The tendency of an object to resist any change in its motion. Also called Newton's First Law of Motion
What is inertia?
This is a friction-like force that opposes the motion of objects that move through the air. e.g. a feather
What is air resistance?
This happens to the motion (direction) of an object when you exert a force on it.
What is changing the motion of the object?
If friction could be removed (think - outer space), an object in motion would do this
What is moving at a constant speed?
Weight (in Science) calculated in the unit.
What are Newtons (N) ?
It is easier to push a 40kg ball than a 400kg ball. This is an example of this law
What is Newton's Second Law of Motion?
According to Newton's Third Law when a basketball is bounced, this is the name for upward movement of the ball.
What is reaction?
This occurs when students are pushing on an object e.g. a door, in opposite directions, with the same size force.
What is a balanced force?
Friction is a type of which force?
What is a contact force?
The gravitational force exerted on an object is this.
What is weight?
A ball rolling down a hill will continue to roll unless friction or another force stops it. This is an example of this law.
What is Newton's First Law of Motion?
Newton's 2nd Law says this.
What is an unbalanced force will change an object's velocity?
This occurs during an unbalanced force.
How do objects move?
Friction always acts in this direction of motion on an object.
What is Opposite?
If you were no longer on the Moon, this would would remain the same, however weight would change with gravity.
What is mass?
To calculate the force an object exerts, you use this formula.
What is F = ma?
This law describes what happens when a tablecloth is pulled out from under a setting of china without damaging it.
What is Newton's First Law of Motion?
This law has to do with opposite and equal reactions.
What is Newton's Thirds Law?
The force of friction can be reduced by using one of these methods.
What is:
lubricants like oil
cushion surfaces
ball bearings?
This object has the greatest force of gravity in our Solar system.
What is the Sun?
Releasing a balloon full of air causes it to fly around the room as the gas released from inside propels the balloon through the air, according to this law.
What is Newton's Third Law of Motion?
A student has modified his car by putting on larger wheels. This is the reason the car takes longer to speed up and slow down.
What is the larger wheels are harder to stop and start turning because they have more rotational inertia an/or because they have more mass, they add to the truck's inertia?