Why do you slip and fall when walking on ice?
The coefficient of static friction is very low.
A push or a pull is called a ___________________.
force
True or False. The sun's gravitational force keeps the planets in their orbits.
True
Name the type of friction. double sided sticky tape on the wall.
Static friction.
Friction is a force that acts _____________ the motion of an object.
against
Weight is measured with a __________________.
spring scale
Who generates more friction with the ground, Mr. Kubin or Mr. Zwirn?
It depends on the type of shoes they are wearing.
Zwirn for half.
All forces have both ______________ and _________.
size direction
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
The Law of Universal Gravitation states that the size of the force depends on the ________________ of objects and the ___________________ between them.
mass distance
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.
Name the type of friction. Sledding down a hill
kinetic Friction
The unit used to label force is called ________________.
Newtons
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
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.)
_________________ is the measure of the gravitational force exerted on an object.
Weight
You are sliding your desk across the classroom and it creates a loud noise. You don't want it to be so loud the next time. What could you do so that it's easier to move the desk? What type of friction is this?
Add wheels to the desk. static friction
The combination of forces on an object is called the _____________________________.
Net force
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
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.
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)