Forces
This is a push or pull on an object.
Force
What law of motion explains why a tissue box will not move from the table unless something makes it move?
1st
What is it called when an object changes its position.
Motion
How fast is a ball rolling if it rolls 100 meters in 20 seconds?
5 m/s
What unit is used for acceleration in the F = ma formula?
m/s^2 (meters per second squared)
This is the force that opposes sliding objects.
Friction
Which law of motion is also known as the law of inertia?
1st
What word is used to describe the speed and direction of an abject?
Velocity
What distance will a car drive if it drives for 3 hours at 60 miles an hour?
180 miles
How do you find the speed of an object?
Distance / time
What is the acceleration due to gravity on Earth?
9.8 m/s
Which law says that with every action there is an equal and opposite reaction?
3rd
What word is used to describe the distance and direction an object travels from its starting point?
Displacement
What is the displacement of a car that drives 4 miles West, 6 miles North, and 2 miles South?
4 miles West, and 4 miles North
When calculating acceleration what do you divide the change of velocity by?
time
If the distance between two objects increases then gravity does what?
decreases
What is the formula for force in the 2nd law of motion?
Force = mass x acceleration ( F = Ma)
What is the acceleration of a car traveling at a constant speed of 50 mph?
0
What force is needed to accelerate a 100 kg box at 25 m/s^2?
2500 N
What are the units for force in the F = ma formula?
Newtons
What is the resistance caused by air called?
Air resistance
What is a an objects resistance to a change in motion is called what?
Inertia
What can be found when multiplying the speed of an object by the time it travels?
distance
If a car a has an acceleration of 5 m/s^2 over the course of 20 seconds, what is the change of velocity?
`100 m/s
What is the formula for for momentum?
momentum = mass x velocity (p = m x v)