Unit 1 Exam

when an object changes its position compared to a reference point.

• acceleration

• speed

• motion

• reference point

total distance traveled divided by total time taken to travel that distance

• velocity

• motion

• acceleration

• average speed

speed of an object in a particular direction

• motion

• velocity

• speed

• acceleration

the rate at which speed or velocity changes

• acceleration

• average speed

• motion

• reference point

an object that appears to stay in place and that helps you detect motion in another object

• acceleration

• average speed

• motion

• reference point

Is this a speed or acceleration graph?

• speed

• acceleration

What is happening at segment E?

• acceleration

• deceleration

• constant speed

• no motion/object at rest

What is happening at segment A?

• no motion/object at rest

• constant speed

• deceleration

A runner crossed the 1 mile marker of a race running at a speed of 9 miles per hour. She crossed the finish line running at a speed of 9.8 miles per hour. This is an example of...

• positive acceleration

• negative acceleration

• no acceleration

What is happening at segment B?

• acceleration

• deceleration

• constant speed

• no motion/object at rest