Calculating Speed and Acceleration

1. 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 car slowing dow to stop at traffic lights

• A toy boat floating in a bathtub

What is the formula to calculate speed?

• S = t/d
• S = d/t
• S = d x t
• S = t x d

Tags

CCSS.6.EE.B.7

Which of the following is a unit for acceleration?

• km/s
• m/s²
• mi/hr
• ft

A stopped car begins moving and reaches a speed of 25m/s in 5 seconds. What is its acceleration?

• +25m/s²

• -0m/s²

• +5m/s²

• 5m/s

Tags

NGSS.MS-PS2-2

A drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?

• 0 m/s
• 40 m/s²
• -40 m/s²
• 40 m/s

Tags

NGSS.MS-PS2-2

Colin skateboards down the sidewalk in front of the school, traveling at 24 km/h. How much time would it take him to travel 6.0 km?

• 0.25 h

• 0.4 h

• 5.4 h

• 12 h

A little freshman moves down the hall at 3.2 m/s. When he sees Luke coming, he slows down. After 3.2 s, he is moving at 1.2 m/s. What is his acceleration?

• -0.25 m/s²

• -42.9 m/s²

• -0.625 m/s²

• -12 m/s²

Kendra is coming home late, past her curfew. As she sneaks quietly into her house trying not to wake up her parents, she slinks up the stairs moving 10.7 m in 26.8 s. Find her speed.

• 0.4 m/s

• 2.0 m/s

• 7.1 m/s

• 10.2 m/s

Ricky chucks a water balloon at his friend. Running for his life, he travels 100 m in 9.83 s. What was his average speed?

• 12.5 m/s

• 9.1 m/s

• 10.2 m/s

• 8.3 m/s