Phys HW 19 Sept 2023

Which graph shows the object standing still?

• A
• B
• C
• D

Which of the velocity vs. time graphs below goes with the position vs. time graph shown?

• 
• 
• 
• 

What is the average acceleration in the first ten seconds?

• 4 m/s2

• 1.5 m/s²

• 10 m/s2

• 0 m/s2

What is the acceleration at 25 s?

• 25 m/s2

• 1.0 m/s²

• 10 m/s2

• 0 m/s2

This is a velocity-time graph.  What is the object doing in segment C?

• Positive acceleration, moving backwards

• Negative acceleration, moving forwards

• Negative acceleration, moving backwards

• No acceleration, moving forwards

• No acceleration, moving backwards

If a motorboat spends 5.0 s going from moving forward at 12 m/s to moving forward at 18 m/s, how far did it go?

• 60 m

• 75 m

• 90 m

• 30 m

• 150 m

If a battery-powered car can accelerate at 14.0 m/s², how fast will it be going after 3.2 s if it started from 0.0 m/s?

• 4.375 m/s

• 10.8 m/s

• 14.0 m/s

• 44.8 m/s

A runner races in the 100 meter dash.  It takes her 10 seconds to finish.  What is her average speed?

• 10 m/s
• 1000 m/s
• 100 seconds
• 10 seconds

A car moves a distance of 1000 m with an average speed of 28 m/s.   Calculate the time.

• 36 seconds
• 28,000 seconds
• 28 seconds
• 972 seconds

How long will it take to travel 78 miles if you are traveling at 65 miles per hour?

• 5070 h

• .83 h

• 1 h

• 1.2 h