force
What is force?
A push or pull
What word describes a change in an object's position?
motion
What type of friction keeps an object from starting to move?
Static
What is the distance traveled in a certain amount of time called?
speed
What type of force (balanced or unbalanced?) always causes a change in an object's speed or direction?
unblanced
Risk & Reward!!
Act like you are on the moon in low gravity for 10 seconds!
What word means the location of an object?
Position
What type of friction happens when two solid surfaces slide past one another?
Sliding
What is the formula for average speed?
s=d/t (speed = distance ÷ time)
Two classes are playing tug of war. Mrs. Corley's homeroom pulls with a force of 50 N. Mr. Goodman's homeroom pulls with a force of 45 N. What was the net force and who won?
5N
Mrs. Corley
What unit do we use to measure force?
Newtons (N)
What is the change in position from the starting point called?
displacement
Risk & Reward!!
Sing and dance to
"I'm a little teapot"
True or False: Speed can be negative.
False
is a moon orbiting Earth at the same speed balanced or unbalanced?
balanced
What tool do scientists use to measure force?
spring scale
What term describes the line or path an object is pointing, aiming, or moving?
Direction
What type of friction resists motion when an object moves through air or water?
Fluid
If a car travels 120 km in 2 hours, what is its average speed?
60 km/h.
True or false: All balanced forces have a net force of zero.
True
On a free body diagram, the box with the arrow, what does the length of the arrow represent?
magnitude
True or false: distance and displacement can sometimes be equal.
True
What type of friction happens when an object rolls over a surface?
Rolling
On a distance–time graph, what does a steeper slope mean?
The object is moving faster.
What is the net force when 50 N pulls right and 30 N pulls left?
20 N to the right.