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Energy is measured in _________.
meters per second
A ball has 100 J of potential energy when it is on a shelf when its not moving. The ball gets bumped off the shelf and starts falling- what happens to the total energy of the system?
Greater than 100 Joules because it is speeding up
exactly 100 Joules
Less than 100 Joules because the energy is lost
none of these
Energy is the ability to cause _________.
Newton’s 3rd law states that for every action, there is an ________ reaction.
unequal and opposite
equal and similar
stronger and opposite
equal and opposite
When a heavy football player and a light one run into each other, who exerts more force on the other?
The light one
The heavy one
Their forces are equal
You hit a wall with a stick. The equal but opposite reaction is _____
the wall pushes against you
the stick pushes against you
the wall pushes against the stick
you push against the stick
When a small car pushes a big truck, the truck applies an equal and opposite force on the car.
unit for force?