Power

How is power defined?

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

What is the equation for power?

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

What is the unit of measurement for Power?

• Joules
• Newtons
• Watts
• Meters

If a crane lifts a small car 15 meters using 25,000 joules of work in 5 seconds, how much power was generated by the crane?

• 5, 000 Watts
• 1,667 Watts
• 75 Watts
• 375,000 Watts

If an MMA fighter uses 40 Newtons of force to punch a bag 0.5 meters in 2 seconds, how much power was created?

• 10 Watts

• 1 Watts

• 20 Watts

• 40 Watts

Tags

NGSS.HS-PS3-2

What is the power required to lift a 10 kg object 5 m in the air in 2 s?

• 250 W
• 25 W
• 100 W
• 4 W

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

If we double the speed of an object, what happens to the kinetic energy?

• doubles
• quadruples
• nothing
• is halved

If 68 watts of power is produced in 18 seconds, how much work is done?

• 1,224 J

• 0.264 J

• 3.77 J

• 12.24 J

Tags

NGSS.HS-PS3-1

How much work is done using a 60-watt light bulb for 1 hour?

• 3600 J

• 216 kJ

• 60 J

• 1 kJ

How much power does it take to do 360 J of work in 18 sec?

• 20 W
• 6,480 J
• 20 m
• 6,480 W