Vocabulary
Balanced and Unbalanced Forces
Newton's Laws
Mic.
What will happen?
100
What is acceleration?
Acceleration is how fast an object changes speed, direction, or both.
100
What is a balanced force? What is an unbalanced force?
Balanced forces are two forces acting in opposite directions on an equal in size.
An unbalanced force is one that causes a change in motion of the object to which the force is applied.
100
What is Newton's First Law of Motion?
An object at rest stays at rest and an object in motion stays in motion until acted upon by an unbalanced force.
100
An unbalanced force doesn't affect motion?
False.
100
What will happen to the people on a bus if the bus stops suddenly?
They will move forward.
200
What is a force?
Force is a push or a pull.
200
If 20N of force is pushing to the left and 35N of force are pushing to the right, which way will the box move?
15N to the left
200
What is Newton's Third Law of Motion?
For every action, there is an equal and opposite reaction.
200
_____ if a force that does not cancel one another out.
A. Balanced force
B. Unbalanced forced
C. Acceleration
D. Mass
B.
200
What would happen to a vase of flowers if you rapidly pulled the tablecloth from under them?
They would remain standing.
300
A force called _______ acts in an object to make it slow down and stop.
Friction
300
If two people are pushing a box to the right and each person is putting forth 20N of force. Which way will the box move and with how much force will it be moving?
To the right with 40N worth of force.
300
What is Newton's Second Law of Motion?
The heavier the mass of an object, the harder it is to move and/or stop the object from moving.
300
If you say, "A bird is going 15 mi/hr west," you are stating its _____.
Velocity.
300
What happens to the speed of a big worm, if it only has to pull a tiny apple?
It will go faster.
400
What is Mass?
Mass is the amount of matter in something.
400
Draw a Net Force Diagram for this scenario.
5N to the left
400
A person flying through the windshield in a car crash is an example of which law of motion?
Newton's First Law.
400
True or False.
A bike on grass is a form of friction?
True.
400
A 7-kg bowling ball is rolled down a lane while a 7-kg cart remains at rest. Which has the greater inertia?
The rolling ball.
500
What is inertia?
Inertia is the resistance of the object to any change in its motion, including a change in direction.
500
Three tractors are chained to a boulder. One tractor applies a 6400 N force to the left, the second pulls with a force of 5500 N to the right, and the third pulls with a 3400 N force to the right. What is the net force on the boulder?
2500N to the right
500
Someone jumping up is an example of which one of Newton's Law?
Newton's Third Law.
500
Which of these are true?
a. Friction takes place when you go down a slide.
b. Friction takes place when you go down a street block on a metal sled.
b.
500
If two people are pushing a box to the right and each person is putting forth 20N of force. Which way will the box move and with how much force will it be moving?
40N to the right.