Review: Unit 3- Lesson 1

_________ is the change in a position of an object.

• gravity

• friction

• motion

• position

The objects or things in view that do not move are called ________.

• friction

• position

• gravity

• a frame of reference

Speed is a measure of how ____ something travels in a given amount of time.

To calculate speed, we need to know distance and _______.

A balanced force doesn't produce motion.

• TRUE

• FALSE

A train travels 200 miles in 2 hours.  What is the average speed?

• 10 miles per hour
• 10 kilometers per hour
• 100 miles per hour
• 200 kilometers per hour

What is a force?

• Motion

• Work

• Push or a pull

A stronger push will make an object move ______.

• Faster

• Slower

• Sideways

• Not at all

Alan travels 100km in 5hrs. Find his average speed in km/h

• 5km/hr
• 10km/hr
• 50km/hr
• 20km/hr

Mark the object that requires the least amount of force to move it.

• a piece of paper

• a chair

• a helicopter

• an air-conditioner