6.8c

Which two measurements are needed in order to calculate the speed of an object in motion?

• distance and time

• time and mass

• force and distance

• volume and time

A block is pulled 1.8 m to the right in 5 s. What is the block's average speed to the nearest hundredth of a m/s? DO NOT FORGET TO INCLUDE UNITS!

A student throws a football three times. Another student records the distance, the amount of time the ball travels and the average speed in the table above. How many seconds did it take for the ball to travel 40 m during the third throw?

• 0.5 s

• 1.0 s

• 1.5 s

• 2.0 s

Tags

NGSS.MS-PS3-1

The vehicles pictured are all traveling at a speed of 15 m/s but only the truck has a changing velocity. The truck has a changing velocity because -

• it accelerates faster than the other 2 vehicles

• it is traveling in the opposite direction from the other 2 vehicles

• it is traveling on a curve in the road

• it needs a large amount of force to move

When a car goes around a corner at 20 mph, why do we say it  accelerates?

• The car is accelerating because of the velocity is constant

• The car accelerates because it's going 20 mph

• Cars always accelerate when they are in motion

• The car is accelerating because it's changing direction

Which graph represents the greatest constant speed?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

In which time interval was the object speeding up?   

• between 0 s and 2 s

• between 2 s and 4 s

• between 6 s and 8 s

• between 8 s and 10 s

Tags

NGSS.MS-PS3-1

Click on the image to enlarge then select your answer.

• A

• B

• C

• D

Tags

NGSS.MS-PS2-2

What is happening at C?

• Stationary

• Accelerating

• Fast steady speed; moving away from the starting position

• Slower steady speed; moving away from the starting position

Tags

NGSS.MS-PS3-1

A description of the speed and direction of an object's motion

• Velocity

• Speed

• Acceleration

• Vector