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Balanced or unbalanced? rocket orbiting at a constant speed
balanced
Balanced or unbalanced? Ball flying through the air
unbalanced
Balanced or unbalanced? Book sitting on a desk
balanced
T/F the forces acting on a car that is speeding up must be unbalanced
true
T/F When forces acting on an object are balanced,the object must be stationary
false
The variables that are kept the same in the experiment are called
dependent variables
control variables
variables
independent variables
the variable that is measured in a science experiment
best variable
dependent variable
independent variable
control variable
The variable that is changed in a science experiment is called
the best variable
the independent variable
the control variable
the dependent variable
The number of variables that are changed in a science investigation (a fair test)
three
as many as possibe
none
one
A south pole and a north pole on magnets will
extend
absorb
attract
repel
If two north poles of magnet are pointed to each other, they will
repulse
attract
repair
repel
What is the force that opposes (resists) the motion of an object?
friction
The units to measure force are called
newtons
What is a push or a pull resulting from two objects interacting?
A force!
Give an example of a contact force
friction, air resistance, tension
Give an example of a non contact force
Gravity, magnetic, electric
