NEET · Physics —

Work Energy and Power appeared 1 time across 1 year — 2.2% of Physics. This question is from Power.

Year	2024	Total
Questions	1	1

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s}^2$)

A. $19.6 ~W$ $19.6 \mathrm{~W}$
B. $39.2 ~W$ $39.2 \mathrm{~W}$
C. $39.2 ~kW$ $39.2 \mathrm{~kW}$
D. $19.6 ~kW$ $19.6 \mathrm{~kW}$

Solution & Explanation

Related Formula

P = (W)/(t) = (mgh)/(t)

Core Logic

Work done to lift the mass is equal to the change in potential energy: $W = mgh$ $W = mgh$ Power is work done per unit time.

P = (1000 \times 9.8 \times 20)/(10)

Step 1: Calculate Power

P = 1000 \times 9.8 \times 2

P = 19600 ~W

P = 19.6 ~kW

Pattern Recognition

Straightforward power calculation. Just verify you're selecting $kW$ $\text{kW}$ instead of $W$ $\text{W}$ in the options array to avoid a careless unit error.

Chapter Mix

Class 11 Physics: Work Energy and Power

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The power of a crane, which lifts a mass of $1000 ~kg$ $1000 \mathrm{~kg}$ to a height of $20 ~m$ $20 \mathrm{~m}$ in $10 ~s$ $10 \mathrm{~s}$ is: ( $g = 9.8 ~m/s²$ $\mathrm{g} = 9.8 \mathrm{~m/s}^2$)

Solution & Explanation

Related Formula

Core Logic

Step 1: Calculate Power

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The power of a crane, which lifts a mass of 1000 ~kg$1000 \mathrm{~kg}$ to a height of 20 ~m$20 \mathrm{~m}$ in 10 ~s$10 \mathrm{~s}$ is: (g = 9.8 ~m/s²$\mathrm{g} = 9.8 \mathrm{~m/s}^2$)

Solution & Explanation

Related Formula

Core Logic

Step 1: Calculate Power

Pattern Recognition

Chapter Mix

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Select Your Target Exam

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The power of a crane, which lifts a mass of $1000 ~kg$ $1000 \mathrm{~kg}$ to a height of $20 ~m$ $20 \mathrm{~m}$ in $10 ~s$ $10 \mathrm{~s}$ is: ( $g = 9.8 ~m/s²$ $\mathrm{g} = 9.8 \mathrm{~m/s}^2$)