Chapter1 Describing Motion

The total distance traveled by an object divided by the total amount of time needed to travel equals the ___________.

• average speed

• friction

• average acceleration

• net force

True or false

In order to find the average speed of an o0bject, you must know its mass and direction.

(a)  

You hear that a storm is moving 15km/h north. You have been given the storm's _____________.

• constant speed

• acceleration

• velocity

• average speed

When an object is at rest, what is its speed?

• 2 m/s

• 3 m/s

• 1 m/s

• 0 m/s

True or false

A speed that does not vary is called average speed.

(a)  

A starting point that can be used to locate a place or thing.

• speed

• reference point

• velocity

• motion

True or false

When an object's speed changes, its velocity also changes.

(a)  

Which of the following sets of directions is most specific?

• Rio City is across the river from here

• Rio City is about 25km from here

• Rio City is 25km Southwest of here

• Rio City is two hills over from the hill Southwest of here

A measure of the distance an object travels in a unit of time.

• meters per second

• velocity

• motion

• speed

When you graph the motion of an object, you put ______ on the horizontal (x) axis and ______ on the vertical (y) axis.

• speed, time

• distance, time

• time, speed

• time, distance