Work and Power Calculations

A 5 Kg body is having a Kinetic energy of 250 J. What is the velocity of the body?

• 10 m/s

• 15 m/s

• 20 m/s

• 40 m/s

Tags

NGSS.MS-PS3-1

What is the mass of a ball that has a kinetic energy of 115 J and is traveling at 9 m/s?

• 1035 kg

• 23.5 kg

• 12.8 kg

• 2.84 kg

Tags

NGSS.MS-PS3-1

Ty lifts a set of 1250kg weights a vertical distance of 2m in a weight lifting contest. What Potential Energy do the weights now possess?

• 12,789 Joules

• 24,500 Joules

• 4,500 Joules

Tags

NGSS.MS-PS3-2

How do you calculate power?

• P = W/t

• P = E/t

• P = w * t

• P = bbq/chicken

How do we calculate work?

• W = F * d

• w = f * D

• W = F * D

• w = f * d

The SI unit of work is?

• Joules

• Watts

• Newtons

• meters

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

The SI unit for power is...?

• Watts

• Joules

• Newtons

• Meters

A force exerted over a distance to move an object is ______________________.

• power

• work

• momentum

• Watt

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

A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 

• 77 J

• 7.7 J 

• 0.7 J 

• 770 J 

Tags

NGSS.MS-PS2-2