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OIC5 - Review Science Final 2
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What's this?
applied force
What's this?
gravity
What's this?
upthrust
What's this?
magnetism
……………………… works in the opposite direction in which the object is moving.
friction
……………………… is an example of friction.
air resistance
When an object is at rest, the forces acting on it are ……………………… .
balanced
Which is the force that attracts objects to the centre of the Earth?
gravity
It changes depending on the strength of gravity acting on mass weight the object.
weight
Measured in kilograms.
mass
Measured in Newtons.
weight
The amount of matter in an object.
mass
Why do some objects float? An object floats if the upthrust force acting on it is ...................... than its weight.
An object floats if the upthrust force acting on it is greater than its weight.
Why do some objects sink? An object will sink if the upthrust force acting on it is ………………........... than its weight.
If the upthrust force acting on it is smaller than its weight.
Rough surfaces create more friction than smooth surfaces. ( True/ False)
True
Balanced forces change the state of motion of the object. (True/ False)
False
Friction slows down moving objects. ( True/ False)
False
Mass is the force of gravity acting on an object. (True/ False)
False
What unit is force measured in?
Newtons
A person falls slower when spreading arms and legs.
air resistance
A person pulls a box.
applied force
Two people hold hands together.
friction
The ground supports the person standing on it.
normal force