Vocabulary
Formulas
Forces
Random
Work and Acceleration
100
The quickest path from start to finish.
What is displacement?
100
the formula for calculating density
D = M / V
100
What is a force?
A force is a push or pull on an object that causes motion.
100
To do work, force and motion have to be in ________ directions.
What is the same direction?
100
The unit for work
What are Joules?
200
A force caused by touching an object.
What is a contact force?
200
the formula for calculating speed
Speed = distance / time
200
A force acting on an object that is equal in size and opposite in direction.
What is a balanced force?
200
Distance is ____________.
What is the actual path taken to get from start to finish.
200
What does acceleration look like on a speed-time graph?
A curved lilne
300
What is the difference between distance and displacement?
Distance is the actual path taken, while displacement is the "shortcut" from start to finish.
300
How do you calculate net force?
By subtracting the forces going in opposite directions.
300
A force that changes an object's position, direction, or speed/velocity
What is an unbalanced force?
300
Would a longer inclined plane reduce the amount of force needed to move an object?
Yes, however it would not change the amount of work done.
300
How does work change using an incline plane?
Work does not change using an incline plane, but force does.
400
An increasing line on a speed-time graph tells us...
the object is speeding up (accelerating)
400
the formula for work
Work = Force x distance
400
A object is being pushed to the right with a force of 5 N, and pulled to the left with a force of 3 N. What is the object's net force?
Net force = 5N -3N Net force = 2N right
400
What does adding more pulleys to a system do to the amount of force required to move an object?
Adding more pulleys reduces the force needed to move an object. (more pulleys make it easier to move)
400
How much force does a car with a mass of 1000 kg and an acceleration of 5 m/s2 produce?
F = m x a Force = 1000 x 5 = 5000 N
500
A horizontal line on a speed-time graph tells us...
the object is going a constant (steady) speed.
500
the formula for calculating velocity
Velocity = distance / time (in a specific direction)
500
A rocket is being pulled down by gravity with a force of 25 N and is being pushed up by it's engine with a force of 35N. What is it's net force?
Net force = 35N up - 25N down Net force = 10N up
500
The word that means to either speed up or slow down.
What is acceleration?
500
Calculate the distance moved if an object you use 30 N of force to push required 90 J of work.
What is 3 meters?
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