Forces and Motion

What causes objects to move?

• Balanced forces

• Unbalanced forces

• Zero Gravity

• Inertia

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.

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

• mass

• gravity

• force

• inertia

What two things do you need to know to calculate the speed of an object

• distance and time

• distance and mass

• time and mass

• force and distance

Speed is how fast an object is moving while velocity is

• speed with acceleration

• speed with a direction

• speed of an object plus the mass

• speed of an object plus the gravity

You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.

• 20N 
• 40N 
• 10N 
• 70N

The speed of an object is found with this formula: S=D/T

A person on a bicycle travels 20 miles in 2 hours. What is the person's speed

• 40 mph

• 22 mph

• 10 mph

• 18 mph