Forces
Motion
Balanced or Unbalanced?
Gravity
Potpourri
100

A push or a pull on an object is called a ___________________.

force

100

The distance an object travels in a certain amount of time is called __________.

Speed

100

If the net force equals zero, is it balanced or unbalanced?

balanced

100
A force of attraction between objects that is due to their masses is called ______________________.
gravity
100
True or False. The sun's gravitational force keeps the planets in their orbits.
True
200

Friction is a force that acts _____________ the motion of an object. Choices: a) against b) in the same direction as

against

200

True or False: If an object changes its direction but keeps the same speed, its velocity changes.

True. Acceleration is based on when velocity changes (slows down, speeds up or changes direction)

200

If there is movement, is the force balanced or unbalanced?

unbalanced

200
True or False. Only some matter experiences gravity.
False. All matter experiences gravity.
200
Weight is measured with a __________________.
spring scale
300

Velocity has ______________ and _________.

speed, direction

300

An object is speeding up. Is this an example of acceleration, speed, or velocity?

Acceleration

300
The Indigo and the Navy Teams are having a tug of war. The Navy Team pulls 25 N left and the Indigo Team pulls 47 N right. What is the net force? (Remember to give the direction also.) Is it balanced or unbalanced?
22N Right Unbalanced
300
The Law of Universal Gravitation states that the size of the force depends on the ________________ of objects and the ___________________ between them.
mass distance
300
True or False. There is no gravity on the moon.
False. There is gravity on the moon. It is less than the amount of gravitational force on the Earth.
400
The unit used to label force is called ________________.
Newtons
400

If an object keeps moving at the same speed and in the same direction, is its motion changing?

No. Motion only changes if speed or direction changes.

400
You and your brother are moving a couch for your mom. You move the couch at 65 N Right and your brother moves the couch at 60 N Right. What is the net force? (Remember to include a direction in your answer.) Is the net force balanced or unbalanced?
125 N Right Unbalanced
400
True or False. If objects move farther apart their gravitational force is decreased.
True. (For example, the sun is so far away from us that it doesn't affect us as much as the gravitational pull of the Earth.)
400
_________________ is the measure of the gravitational force exerted on an object.
Weight
500

The total forces acting on an object is called the _____________________________.

Net force

500

You run 100 meters north, then 100 meters south back to where you started. What is your displacement?

0 meters-- because you ended where you started

500
You are having a tug of war with your puppy. You are pulling the rope with a force of 37 N Right and your puppy is pulling the rope at 37 N Left. What is the net force. (Remember the direction.) Is it balanced or unbalanced?
O N (No direction is needed.) Balanced
500
Why are we affected by the gravitational force of the Earth and not the gravitational force of a pencil?
We are affected by the gravitational force of the Earth because it is so large. Even though the pencil has gravitational force, it is too small to affect us.
500
If a person weighs 600 Newtons on the Earth. What is his weight on the moon?
100 Newtons (Divide by 6 to get your answer)
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