Work - Physics

Work is

• having a job

• movement

• energy transfer

• energy transfer to an object

The ( ) the force the ( ) work is done

• less, more

• smaller, more

• bigger, more

• bigger, less

if something is shifted a long way then there is ( ) work is being done

• less

• more

• same

• none

If the object does not move then what is happening

• nothing

• work

• power

• no work is being done on the object

what is the two things that need to occur for work to have been done?

• force and movement

• movement and direction

• constant force and power

• power and work

The unit of work is

• watt

• hertz

• joule

• pascal

What is the Equation for Work Done?

• Work Done = Force x Distance

• Work Done = Force / Distance

• Work Done = Distance / Force

A woman lifts 20 bricks, each of weight 6N.
What other information is needed to calculate the useful work done in lifting the bricks?

• the distance she lifts the bricks
• the mass of the bricks
• the time taken to lift the bricks
• the volume of the bricks

A mover pushes a 1700 N piano a distance of 4 meters. How much work is done by the mover?

• 425 kg

• 425 Joules

• 6,800 kg

• 6,800 Joules

A weightlifter holds an 800-newton barbell over his head at a height of 6 meters. How much work does the weight lifter do on the barbell?

• 0 J

• 0 W

• 4,800 J

• 4,800 W