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How much work is done lifting a 5 kg ball from a height of 2 m to a height of 6 m? (Use 10 m/s for the acceleration

of gravity)
19

User Jerika
by
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1 Answer

5 votes

Step-by-step explanation:

In physics, work is defined force that causes displacement. So this can be expressed by the following equation:


W=Fs

Where:


F:Force \\ \\ s:Displacement

The force can be found as:


F=ma \\ \\ F=5(10)=50N

And for the displacement:


s=6-2=4m

The force (weight) is down and the displacement is up, then the work must be negative. So:


W=-(50)(4) \\ \\ \boxed{W=-200J}

User Jhabbott
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