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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
independent variables
variables
control variables
dependent variables
the variable that is measured in a science experiment
control variable
best variable
independent variable
dependent variable
The variable that is changed in a science experiment is called
the dependent variable
the control variable
the best variable
the independent variable
The number of variables that are changed in a science investigation (a fair test)
one
three
none
as many as possibe
A south pole and a north pole on magnets will
attract
absorb
repel
extend
If two north poles of magnet are pointed to each other, they will
repair
attract
repel
repulse
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
