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Forces
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What is the net force
10N
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Give an example of a contact force
friction, air resistance, tension
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The net force of a falling object when it reaches terminal velocity (constant speed) would be
Zero
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Balanced or unbalanced? rocket orbiting at a constant speed
balanced
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the variable that is measured in a science experiment
dependent variable
best variable
independent variable
control variable
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T/F When forces acting on an object are balanced,the object must be stationary
false
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T/F the forces acting on a car that is speeding up must be unbalanced
true
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Give an example of a non contact force
Gravity, magnetic, electric
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If two north poles of magnet are pointed to each other, they will
repel
repair
repulse
attract
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If the weight of the TV is 650 N what would be its mass?
65 KG
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The variable that is changed in a science experiment is called
the independent variable
the control variable
the dependent variable
the best variable
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Are the forces balanced or unbalanced ?
unbalanced
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What are the 2 main forces acting on a sky diver
Gravity and air resitance
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Balanced or unbalanced? Book sitting on a desk
balanced
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What is the force that opposes (resists) the motion of an object?
friction
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Balanced or unbalanced? Ball flying through the air
unbalanced
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A south pole and a north pole on magnets will
extend
attract
repel
absorb
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The units to measure force are called
newtons
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What is a push or a pull resulting from two objects interacting?
A force!
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What is the weight of the table if the mass is 17kg (on earth)
170 N
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The number of variables that are changed in a science investigation (a fair test)
one
none
three
as many as possibe
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The variables that are kept the same in the experiment are called
dependent variables
independent variables
control variables
variables
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