Work, Power & Mechanical Advantage

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

• 15 J
• 45 J
• 0 J
• 5 J

What is the equation for power?

• P = Work/time
• P = Force/time
• P = time/distance
• P = Work * time

A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds.  How much power was used?

• 360 W 
• 60 W
• 3600 W
• 600 W

800 Newtons of force moving a distance of 20 meters will be how much work done?

• 40 J
• 1,600 J
• 400 J
• 16,000 J

What is the unit of measurement for Power?

• Joules
• Newtons
• Watts
• Meters

45,000 Joules of work done in 90 seconds results in how much power?

• 50 watts
• 500 watts
• 5000 watts
• 4,050,000 watts

Tags

CCSS.6.RP.A.3B

If you push a coffee mug 1.4 m using a force of 5 N, the work done on the mug is?

• 7 J
• 6 J
• 8 J
• 9 J

How far does a car that weighs 5,000 N go if 18,000 J of work is done on it?

• 3.8 m
• 3.7 m
• 3.2 m
• 3.6 m

What is power?

• transfer a force through a distance
• the rate of speed 
• the rate of work being done
• transfer of space over time

 Work done = Force x _________

• a. distance
• b. acceleration
• c. velocity
• d. speed