5th Science B2 Test

A correct measure of velocity is:

• miles/hour

• minutes/seconds

• km/hr north

• km/minutes

When an object at rest is contacted by something to make it move, it has come in contact with

• force

• inertia

• acceleration

• gravity

If one force pushes forward, another force will push

• backward

• downward

• left

• right

The rate that a car's velocity changes is called what?

• acceleration

• gravity

• force

• speed

A test car is traveling at a constant velocity of 90 km/hr west. Its acceleration is what?

• zero

• half of the velocity

• equal to the velocity

• double the velocity

The effect of friction on a moving object is:

• slows it down

• speeds it up

• doesn't change

You can pick up a piece of paper because of the friction produced by your what?

• fingernails

• fingerprints

• wrists

• palms

Friction occurs when one object ___________ over another object.

• slides

• is held

• falls

• tumbles

When an object is dragged, a lot of friction occurs between it and what?

• the ground

• the air

• water

• dirt

A meteor burns because of what?

• streamlining

• air resistance

• sliding friction

• rolling friction