A body of mass 20kg is initially at a height of 3m above the ground. It is lifted to a height of 2m from that position.

Question

A body of mass 20kg is initially at a height of 3m above the ground. It is lifted to a height of 2m from that position.

A body of mass 20kg is initially at a height of 3m above the ground. It is lifted to a height of 2m from that position. Its increase in potential energy is

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Mass, m = 20kg

Height m, H = 3m

Potential Energy, (PE₁) = mgH

PE₁ = 20 x 9.8 x 3

PE₁ = 588 joules

Now Height (h) is 5m (3m + 2m)

(PE₂) = mgh

(PE₂) = 20 x 9.8 x 5

(PE₂) = 980 Joules

Increase in Potential Energy = PE₂ - PE₁

= 980 - 588

= 392 joules

21 views Answered 2023-02-05 15:29