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WorksheetsEvan study guide
Total questions: 23
Worksheet time: 6hrs 45mins
What is a force?
A push or pull
Weight and mass
Mass distance
newtons
What is friction?
The force that acts on two objects when they rub together
one force
10 force
0 force
What are the two factors that affect the force of friction?
How hard the surfaces rub together
softer surface rub
What causes friction?
one surface
When the irregularities of one surface come into contact with another surface
no contect
What direction does friction move when an object is moving?
Opposite the direction of motion
same direction
straight directions
What are the 4 types of friction?
Static Friction
Sliding friction
Rolling friction
Fluid Friction
What does fluid mean?
Liquid Or gas
Able to flow or have other objects flow through it
water and friction
gravity and force
Identify examples of each type of friction.
Static Friction - Book on a table
Sliding Friction - Skiing or sledding
Rolling Friction - Skateboarding
Fluid Friction - Surfing
What is gravity?
pulls
not attract
Force that pulls objects toward each other
force
What is the law of universal gravitation?
Object has mass and takes up space which is matter
no matter
Force of gravity acts between all objects in the universe
matter
What two factors affect the force of gravity?
Friction
Mass
Distance
Force
What is weight?
mass
not acting on objects
force
The force of gravity acting on an object at the surface of a planet
What is mass?
matter in force
The amount of matter in an object
matter in friction
matter in matter
What unit of measurement is used to measure mass?
Inches
Kilogram (kg)
Forces
Matter
What unit of measurement is used to measure weight?
Force
Newton (N)
Friction
Matter
What is the difference between weight and mass?
Weight changes when the force of gravity changes, mass always stays the same
mass is mass
weight is weight
none
What is free fall?
all forces
In a vacuum, there is no air so an object can experience free fall in a vacuum.
When the only force acting on an object is gravity
none
When an object is in free fall, at what rate do all objects accelerate because of the force of gravity on Earth?
have fun
9.8 m/s2 or 9.8 m/s/s
none
9.8 m/s squared 9.8 m/s^2 9.8 m/s2
What is air resistance?
none
The fluid friction objects experience falling through the air
all
What affects the amount of air resistance that acts on an object? Give at least two factors that affect air resistance.
none
Shape of the object (greater surface area, the greater the air resistance)
ovel object
Velocity or speed of the object (faster the object is moving, the more air resistance)
What is terminal velocity
The greatest velocity a falling object reaches
Forces are balanced
Force of gravity and air resistance are equal
What is a projectile?
none
straight
An object that is thrown
vertical
What happens when you drop an object and an object is thrown horizontally forward at the same time? Explain.
Both the dropped object and the object thrown land at the same time.
The reason for this is that both objects experience the same force of gravity and as a result fall at the same rate.
none
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