Question

If 784 joules of work was done in lifting a 20 kg mass,calculate the height through which it was lifted

Answer 1

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Answer 2

Answer: .3.92m

Explanation:Given: Mass of object=20kg

Work done=784Joule

To find Height,

We know that,

Work done= force×Displacement

We don't have force to find this,

We have to find force,

Force=mass × acceleration due to gravity,

F=m×a

Mass is 20kg, and use a =(-10m/s)

F=20×(-10)

=-200 Newton

Now use w= f×s

784=-200×s

When we solve this, Answer is 3.92m

Thus the height of the object lifted

Is 3.92 m

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