Vocab 1
What is the SI unit of force?
Newton
What does velocity have that speed does not have?
Direction
What is a push or pull?
Force
What type of force has motion?
Unbalanced force
What type of friction has no motion?
Static friction
What is the SI unit for weight?
Newton
What is a force that opposes motion between 2 touching surfaces?
Friction
What type of line shows constant velocity?
A straight line
What is the force that results from combining all the forces exerted on an object?
Net force
What type of force is shown by a light hanging from the ceiling?
A balanced force
What type of friction is used mainly in the transportation business?
Rolling friction
What is missing?
Gravitational forces ____________ as mass increases.
increases
What is an object's change in position over time when compared with a reference point?
Motion
What is the formula for average speed?
Speed = total distance/total time
What is the measure of the gravitational force exerted on an object, usually by the Earth?
Weight
What is the net force of a balanced force?
0 (Newtons)
What type of friction includes liquids and gases?
Fluid friction
What is missing?
Gravitational forces increase as distance __________.
decrease
What is a force of attraction between objects that are due to their masses?
Gravity
What is the rate at which velocity changes?
Acceleration
What is the speed of an object in a particular direction?
Velocity
What is the net force when someone is pulling a rope using 10 newtons of force and someone else is pulling the rope in a different direction with 12 newtons of force?
2 newtons
What type of friction has a net force of 0?
Static friction
Who is credited for developing the Law of Universal Gravitation?
Sir Isaac Newton
What is the rate at which an object moves?
Speed
What is the formula for acceleration?
Acceleration = final velocity - initial velocity/total time
What is the amount of matter that something is made of?
Mass
What is the net force when someone is pushing a desk with 8 newtons of force and someone else is pulling the desk in the same direction with 7 newtons of force?
15 newtons
What type of friction uses the most force?
Sliding friction
What is missing?
All objects in the universe attract each other through _________ force.
gravitational
What is a fluid?
Either a liquid or a gas
What is the acceleration of a car that goes from 80 m/s to 100 m/s in 10 s?
2 m/s/s
What is the rate at which velocity changes?
Acceleration
Name the 3 types of acceleration?
Positive acceleration
Negative acceleration or decleration
Centripetal acceleration
Name the two things friction depends on?
The roughness of the surfaces and the forces pushing the surfaces together (pressure)
Fill in the missing blanks.
The size of the force depends on the _____________ of the objects and the __________ between them.
mass
distance