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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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Cannot say

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Solution

The correct option is A Avinash
We know,
Power(P) $= F o r c e (F) \times v e l o c i t y (v)$ ;
Power deliver by Avinash= $10 \times 8$ $= 80 W$ ,
Power deliver by Kapil= $25 \times 3$ $= 75 W$
Hence,
Avinash is more powerful because he delivers a power of $80 W$ , while Kapil delivers a power of $75 W$ .

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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. 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. 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?

Two blocks A and B with masses $m$ and $2 m$ are held against a vertical wall. The horizontal force applied to both the blocks is $25 N$ . Assuming coefficient of friction is same in both cases, the correct relation is

Q. A block of mass

1 k g

is pushed against a rough vertical wall with a force of

20 N

. coefficient of static friction being

\frac{1}{4}

. Another horizontal force of

10 N

is applied on the block in a direction parallel to the wall. Will the block move? If yes, with what acceleration? If no, find the frictional force exerted by the wall on the block.

(g = 10 m / s^{2})

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

The correct option is A AvinashWe know,Power(P)=Force(F)×velocity(v);Power deliver by Avinash=10×8=80 W,Power deliver by Kapil=25×3=75 WHence,Avinash is more powerful because he delivers a power of 80 W, while Kapil delivers a power of 75 W.

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?