Power review

How much work is being done with 200 N of force over 426 meters?

• 85,200 J
• 45,620 J
• 90,480 J
• 62,329 J

Tags

NGSS.HS-PS3-1

If 150 Joules of work is needed to move a box 10 meters, what force was used? 

• 1500 N
• 15 N
• 1.5 N
• 150 N

Tags

NGSS.HS-PS2-1

Which value and symbol are incorrectly paired?

• work and joules
• force and newton
• power and watt
• potential energy and watt

Tags

NGSS.MS-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

What is the unit of power?

• Watts (W)

• Joules (J)

• Newtons (N)

• Amps (A)

What is the power of a toaster which can transfer 10,000J of electrical energy in 10 seconds?

• 100,000W

• 100,000A

• 1,000W

• 1,000A

What is the power of a charger which transfers 1,200J of energy in 2 minutes?

• 12W

• 60W

• 600W

• 10W

What is the definition of Power?

• The rate at which work is done
• Energy changing forms
• How much energy something has
• The total work + total energy of a system

An engine reaches its top speed from rest in 7.5 s. It is able to perform 250,000 J of work in that time.  How much power does this engine have in that time? 

• 0.00003 W
• 33,333 W
• 1,875,000 W
• 1873 W

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

Tags

NGSS.MS-PS2-4