Forces
If two people pull a rope in opposite directions, what is that force called?
Balanced forces
What is a force that resists the sliding of an object?
Friction
What it the path along which something moves called?
Direction, think of the cardinal directions (NSEW)
If one person pulled a cart to the left and one person pulled it to the right, which way would it go?
Trick question! It wouldn't move because the forces are balanced.
True or False, It is important to know about friction because it is used to design tires, shoes and slides.
True
An object at __________ will stay at _______, and an object in motion will stay in motion, unless acted upon by an outside force.
Rest
If two people pull a box to the left and one person pulls to the right, which way will it go?
Left, the forces are unbalanced and there is more force to the left
Which surface will a ball roll on easier, sand or glass?
Glass, it has less friction
What is it called when there is an equal amount of push and pull on an object? (hint: balanced forces)
Zero Net Force
What kind of force is it when two people push a fridge on the same side and one person pushed on the other? (hint: think of tug-o-war)
If you had to move a bed, would it be easier to move on ice or gravel?
Ice has less friction so it would be easier
What is the thing that does change in an experiment called? (hint: its a variable)
Dependent Variable
A contact force in which an object is moved away from the person or object exerting the force
Push
The water and soap on a slip-n-slide reduces this force, which makes sliding easier (and less painful!)
Friction
What is the the thing that doesn't change in an experiment called? (hint: it stands alone)
Independent Variable