Does not cause a change in motion. They are equal in size and opposite in direction.
Balanced Forces
100
A car travels 60 kilometers in 4 hours. What was the speed of the car?
15 km/h
100
When you drop your book on the floor, you are demonstrating...
Gravitational Force
100
You push a car with 120 N. What is the net force?
Net Force: 120 N
100
Which one of Newton's laws states that an object in motion stays in motion, unless acted upon by a nonzero net force?
(also known as Newton's Law of Inertia)
Newton's First Law of Motion
200
The SI unit used to measure the strength of a force.
Newton
200
A man runs 3 miles in 1 hour. How fast was the man running?
3 mph
200
When you pull a chair across a room, you are demonstrating...
Applied Force
200
A student is pushing on a piano using 30 N to the right. Another student is pulling the same piano using 40 N to the right. What is the net force that the students are using
to move the piano? Direction?
Net Force: 70 N to right.
200
Which of Newton's Law's states that if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.
Newton's Third Law of Motion
300
The force that one surface exerts on another when two surfaces rub against each other.
(CONTACT FORCE)
Friction
300
A car travels at a speed of 80mph for a total of 6 hours.
How far did the car go?
480 miles.
300
When you make a sock stick to your shirt,you are demonstrating...
Electrical Force
300
Four friends are playing tug-of-war, two versus two. The two friends on the left are pulling 20 N each, and the two on the right are pulling 15 N each. What is the net force and which side is going to win?
Net Force: 10 N to the LEFT
300
When you sit on a chair, the chair exerts a ________ _____, which prevents you from falling to the ground.
Reaction Force
400
A force that is put on an object by another object.
(CONTACT FORCE)
Applied Force
400
Car travels 600 miles at a speed of 60 mph.
How much time did it take?
10 hours.
400
When you stand on a bathroom scale, it displays the __________ Earth is exerting on you.
Gravitational Force
400
A box has a force of 80 N to the left applied to it. It also has a force of 28 N to the right applied to the box. What is the net force?
Net Force: 52 N to the left.
400
Which of Newton's Laws states that an object's acceleration depends on its mass and on the net force acting on it?
Newton's Second Law of Motion
500
A force between two charged objects.
Force acting at a distance
(NON-CONTACT)
Electrical Force
500
Car speed is 90 mph for a total of 270 miles.
How many hours did it take?
3 HOURS
500
Name the three forces that act at a distance.
(NON-CONTACT)
Gravitational, Electrical, and Magnetic
500
A moving company is moving furniture. Two movers are moving a large cabinet. One mover is applying a force of 75 N to the left and the other mover is applying 85 N to
the left. What is the net force that is being used to move the cabinet? Direction?
Net Force: 160 N to the Left
500
True or False
If you increase the mass of an object, but keep the force on it constant, its acceleration DECREASES.
True
Acceleration= Net Force/ Mass
The larger the MASS, the more FORCE is needed to maintain a desired acceleration.