8th Sci Quiz (7.1)

______ is an object's location relative to a reference point

• Direction

• Speed

• Position

• Reference Point

In the following sentence, identify the reference point:

The airplane is above the building.

• Airplane

• Above

• Building

• Is

In the following sentence, identify the object:

The airplane is above the building.

• Airplane

• Above

• Building

• Is

A high school bus travels 500 km east in 5.0 hrs. What is its average velocity for the trip? (Use Correct Units!!)

• 2500 km/hr

• 100 m

• 100 km/hr

• 0.01 km/hr

An airplane flies at a constant speed of 900 km/hr. How far will the airplane travel in 3 hours? (Use correct units!!)

• 2700 km/hrs

• 2700 km

• 300 km

• 0.003 km

A police car drives at a constant speed of 10 mi/hr. How long will it take to travel a distance of 70 mi? (Use correct units!!)

• 7 hrs

• 7 mi

• 700 hrs

• 0.14 hrs

A motorist traveling south on a straight stretch of open highway sets his cruise control at 45 km/hr. How far will he travel in 0.2 hours?

(Use correct units!!)

• 9 km/hr

• 225 km

• 4.4 km

• 9 km

Acceleration involves a change in speed and ______.

• distance

• direction

• length

• position

A ball rapidly picks up speed as it rolls down a hill. As it starts down the hill, its speed is 5 m/s. After 3 seconds, at the bottom of the hill, its speed is 20 m/s. What is its average acceleration? (Use correct units!!)

• 5 m/s²

• 5 s

• 4 m/s²

• 1.7 m/s²

A gecko accelerates from 2 m/s to 16 m/s in 4 seconds. What is the lizard's average acceleration? (Use correct units!!)

• 35 m/s

• 14 m/s²

• 3.5 m

• 3.5 m/s²