Forces, Work, Power and Pressure

Which is the correct unit for work?

• Joules

• Newton

• meter

• Watts

Tags

NGSS.MS-PS3-5

Newtons are the correct unit for which of the following?

• Force

• Work

• Power

• Acceleration

Tags

NGSS.HS-PS2-1

What is the correct unit for power?

• Watt

• Joules

• Newtons

• seconds

It took 50 Joules to push a chair 5 meters across the floor. With what force was the chair pushed?

• 10 N

• 0.1 N

• 250 N

• 1 N

Tags

NGSS.MS-PS2-2

What is the power of a kitchen blender if it can perform 3,750 Joules of work in 15 seconds?

• 250 W

• 0.004 W

• 56,250 W

• 25 W

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-3

How much work is done using a 500-watt microwave oven for 1 minute? (Hint: Use seconds as the unit for time.)

• 30,000 J

• 500 J

• 8.3 J

• 0.12 J

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is the force on a 2.4 kg skateboard accelerating at a rate of 2 m/s²?

• 4.8 N

• 1.2 N

• 0.83 N

• 2 N

Tags

NGSS.MS-PS2-2

How much power is used if a force of 35 Newtons is used to push a box a distance of 10 meters in five seconds? (Hint: Solve for work first. This is a 2-step problem.)

• 70 W

• 3.5 W

• 7 W

• 350 J

Tags

NGSS.MS-PS3-4

It took 500 Newtons of force to push a car four meters. How much work was done?

• 2000 J

• 125 J

• 0.008 J

• 500 J

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec². What is the mass of the object?

• 50 g

• 1250 g

• 0.02 g

• 25 g

Tags

NGSS.MS-PS2-2