Motion

A car is driven for 3 hours. What else do you need to know to describe this car’s speed?

• the road the car in driven on
• the time of day
• the distance the car is driven
• the number of passengers in the car

What is the speed of a runner who runs 400 meters in 40 seconds?

• 10 meters/second

• 40 meters/second

• 100 meters/second

• 1,600 meters/second

Which information is needed to determine how fast a truck is traveling?

• direction and mass
• distance and time
• size and speed
• time and weight

What is a force?

• a push or pull
• speed or acceleration 
• potential or kinetic energy
• balanced or unbalanced force

When objects remain in the same place, it is called...

• gravity
• friction
• balanced force
• unbalanced force

What is the force that causes everything to be pulled down to the Earth?

• friction
• gravity
• balanced
• unbalanced

An unbalanced force is when objects move in one direction because the force is greater from that direction.

• true

• false

What pulls a ball back to earth?

• Gas
• Gravity
• Friction
• Molecules

An automobile you are riding in suddenly stops, why does your body continue to go forward?

• An object in motion stays in motion.

• Gravity pulls your body towards the earth.

• Friction makes your body slow down.

If you push a tennis ball, a bowling ball, and a basketball with the same amount of force, which one will go farthest?

• bowling ball

• tennis ball

• basketball