Physical Science Units Review

Which of the following equations should be used to calculate work done?

• W = F × d
• W = F/d
• W = F × a
• W = m × d

You apply a force of 18 N to a dresser and move it 3.0 m. How much work did you do on the dresser?

• 54 J

• 54 N

• 54 kg

• 54 W

A watt is equal to _______.

• one newton-meter
• one meter per second
• one newton per second
• one joule per second

The _______ is the SI unit of energy.

• watt
• joule
• ampere
• volt

Which of these metric units would most likely be used to measure the height of a room?

• meters
• inches
• millimeters
• liters

Force can also be known as __________________, when the mass is multiplied by acceleration due to gravity.

• acceleration

• Work

• Weight

• Speed

The correct units for speed or velocity are

• m/s²

• m/s

• N

• kg

The correct units for each part of the equation F= ma are

• Newtons = g * m/s²

• Joules = m * m/s

• Newtons = g * m/s

• Watts = m * kg

The correct units for Power are

• joules

• kilograms

• newtons

• watts

In a problem, you are asked to find the height of a hill. What are the correct units for height?

• kilograms

• watts

• mass

• meters