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Standard XII

Physics

Problem Solving

Avinash can r...

Question

Avinash can run with a speed of $8$ $m s^{- 1}$ against the frictional force of $10$ $N$ , and Kapil can move with a speed of $3$ $m s^{- 1}$ against the frictional force of $25$ $N$ . Who is more powerful?

Avinash

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Kapil

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Both are equally powerful

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None

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Solution

The correct option is A Avinash
Power of Avinash $P_{A} = F_{A} . v_{A} = 10 \times 8 = 80 W$
The power of Kapil $P_{K} = F_{K} . v_{K} = 25 \times 3 = 75 W$
So, Avinash is more powerful than Kapil.

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Similar questions

Question 11
Avinash can run with a speed of $8 m s^{- 1}$ against the frictional force of $10 N$ , and Kapil can move with a speed of $3 m s^{- 1}$ against the frictional force of $25 N$ . Who is more powerful and why?

Q. Question 11
Avinash can run with a speed of

8 m s^{- 1}

against the frictional force of

10 N

, and Kapil can move with a speed of

3 m s^{- 1}

against the frictional force of

25 N

. Who is more powerful and why?

Q. Avinash can run with a speed of

8 m s^{- 1}

against the frictional force of 10 N, and Kapil can move with a speed of

3 m s^{- 1}

against the frictional force of 25 N. Who is more powerful?

Q. An elevator can carry a maximum load of

1800 k g (e l e v a t o r + p a s s e n g e r s)

is moving up with a constant speed of

2 m s^{- 1}

. The frictional force opposing the motion is

4000 N

. What is minimum power delivered by the motor to the elevator?

Q. An elevator in a building can carry a maximum of

10

persons, with the average mass of each person being

68 kg

. The mass of the elevator itself is

920 kg

and it moves with a constant speed of

3 {ms}^{- 1}

. The frictional force opposing the motion is

6000 N

. If the elevator is moving up with its full capacity, the power delivered by the motor to the elevator

(g = 10 {ms}^{- 2})

must be at least

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Avinash can run with a speed of 8 ms−1 against the frictional force of 10 N, and Kapil can move with a speed of 3 ms−1 against the frictional force of 25 N. Who is more powerful?

The correct option is A AvinashPower of Avinash PA=FA.vA=10×8=80WThe power of Kapil PK=FK.vK=25×3=75WSo, Avinash is more powerful than Kapil.

Avinash can run with a speed of $8$ $m s^{- 1}$ against the frictional force of $10$ $N$ , and Kapil can move with a speed of $3$ $m s^{- 1}$ against the frictional force of $25$ $N$ . Who is more powerful?

The correct option is A Avinash
Power of Avinash $P_{A} = F_{A} . v_{A} = 10 \times 8 = 80 W$
The power of Kapil $P_{K} = F_{K} . v_{K} = 25 \times 3 = 75 W$
So, Avinash is more powerful than Kapil.