Calculate Speed, Velocity, and Acceleration

Which of the following statements about speed and velocity is correct?

• Velocity only describes an object’s rate of motion.

• Speed describes how an object is changing its velocity.

• Speed and velocity both describe how an object is speeding up.

• Only velocity includes the direction an object is traveling.

Acceleration describes how an object’s velocity is changing. Which of the following scenarios provides the best example of an accelerating object?

• A car driving at a constant speed

• A book sitting on top of a high shelf

• A toy train traveling in a circle

• A toy boat floating in a bathtub

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

The gees fly 23 mph to the south when they migrate for the winter.

• speed

• velocity

• acceleration

Tags

NGSS.MS-PS3-1

Speed/Velocity/Distance/Acceleration

• Speed

• the distance covered by an object in unit time

• Speed

• The distance an object travels per unit of time

• Velocity

• The rate of change of velocity

• Acceleration

• D/T

• Distance

• How far an object travels

Tags

NGSS.MS-PS3-1

Which of the following best describes the velocity of an object?

30 ​ (a)  

• m/s east

• m/s

• m east

• m/s2

Tags

112.20.b.6.B

SPEED/VELOCITY/ACCELERATION: Speed is the ​ (a)   and object travels over a given period of ​ (b)   . Speed does not account for ​ (c)   . ​ (d)   is the speed and object travels in a specific direction.

Acceleration in the​ ​ (e)   in displacement such as speeding up, slowing down, or changing direction.

• change

• distance

• time

• direction

• Velocity

Tags

112.20.b.6.B

A runner races in the 100 meter dash.  It takes her 10 seconds to finish.  Her average speed is (a)  

• 10 m/s

• 1000 m/s

• 100 seconds

• 10 seconds

Answer explanation

To find the average speed, divide the distance by the time. The runner covers 100 meters in 10 seconds. Average speed = 100 m / 10 s = 10 m/s. Thus, the correct answer is 10 m/s.

Tags

NGSS.MS-PS3-1

Match the following

• The boat travels east at 50 km/hr

• Speed

• Cindy travels 4 meters in 3 seconds.

• Velocity

• The car moves at a constant speed around a curve.

• Acceleration

Tags

NGSS.MS-PS3-1

A velocity of 5 m/s means that an object will travel​ ​ (a)   meter(s) in ​ (b)   second(s)

• 5

• 1

• 2

• 20