Pressure, Energy, and Work Review Practice

The pressure resulting from a force of 50 N exerted over an area of 5 cm² is

• 100 kPa

• 0.1 kPa

• 10 kPa

• 0.01 kPa

Calculate:

If I have 5.6 L of gas in a piston at a pressure of 1.5 kPa and compress the gas until its volume is 4.8 L, what will the new pressure inside the piston be?

• 1.3 kPa

• 2.2 kPa

• 1.8 kPa

• 0.7 kPa

Calculate:

I have 130 liters of gas in a piston at a temperature of 523 K. If I cool the gas until the volume decreases to 85 liters, what will temperature of the gas be?

• 163 K

• 342 K

• 800 K

• 216 K

What force must be applied to an area of 6 cm² to create a pressure of 80 kPa?

• 480 N

• 13.3 N

• 360 N

• 27.2 N

If 50 N are put into a piston on a hydraulic lift with an area of 0.5 cm² with an output piston of 2.5 cm², what will be the output force?

• 10 N

• 50 N

• 500 N

• 250 N

A cheetah can run briefly with a speed of 31.0 m/s. Suppose a cheetah with a mass of 47.0 kg runs at this speed. What is the cheetah’s kinetic energy?

• 1457 Joules

• 22,584 Joules

• 15 Joules

• 45,167Joules

Tags

NGSS.MS-PS3-1

Calculate the kinetic energy of a moving 4 kg object travelling at a velocity of 3 m/s.

• 18 J
• 36 J
• 12 J
• 6 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

A 60.0 kg person walks from the ground to the roof of a 74.8 m tall building. How much gravitational potential energy does she have at the top of the building?

• 43982.4 J
• 63982.3 J
• 43962.4 J
• 83942.4 J

Tags

NGSS.MS-PS3-2

A pitcher throws a baseball at a velocity of 30.0m/s giving it 65.25 J of KE. What is the mass of this baseball?

• 0.5 kg

• 0.75 kg

• 1.5 kg

• 0.15 kg

What type of energy includes both kinetic and potential energy?

• mechanical energy
• chemical energy
• heat energy
• sound energy

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5