Forces and Motion

What causes objects to move?

• Balanced forces

• Unbalanced forces

• Zero Gravity

• Inertia

A rocket's action is to push down on the ground with the force of its powerful engines. The reaction is that the ground pushes the rocket upwards with an equal force, but opposite in direction. Which law best explains this event?

• 1st Law - The Law of Inertia

• 2nd Law - The Law of Acceleration

• 3rd Law - The Law of Action/Reaction

• The Law of Gravity

A person pushes a bowling ball 10 meters and then pushes a tennis ball 10 meters. Which push requires more force and why?

• The bowling ball because it has less acceleration

• The tennis ball because it has a greater acceleration

• The bowling ball because it has a greater mass

• The tennis ball because it has less mass

When you slide a box across the floor what force must our push force be stronger than?

• gravity

• friction

• support force

What unit is used to measure force?

• inches

• centimeters

• grams

• Newtons

The moon has a smaller mass than Earth. How does the moon's gravity compare to Earth's gravity?

• The moon's gravity is greater than Earth because the moon has more mass.

• The moon's gravity is less than Earth because he moon has less mass.

• The moon and Earth's gravity are the same because gravity is a constant force.

• The moon does not have gravity because it is in outer space.

The moon has a smaller mass than the Earth. If you were to jump on the moon, your jump would

• be the same as a jump on Earth

• be smaller than a jump on Earth because there is more gravity on the moon

• be larger than a jump on Earth because there is less gravity on the moon

• change depending on the time of day

A roller coaster takes off at a high speed. Your feel yourself thrown back against your chair because of your

• mass

• gravity

• force

• inertia

Which law of motion?

It is harder to push a full grocery cart than an empty grocery cart.

• 1st Law - Law of Inertia

• 2nd Law - Law of Acceleration

• 3rd Law - Law of Action/Reaction

• Law of Gravity

Which law of motion?

A car stops suddenly. The passengers are thrown forward until they are caught by their seatbelts.

• 1st law - Law of Inertia

• 2nd Law - Law of Acceleration

• 3rd Law - Law of Action/Reaction

• Law of Gravity