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Standard VIII

Physics

Free Body Diagram

A block of ma...

Question

A block of mass $5 K g$ is at rest on a smooth horizontal surface. Water coming out of a pipe horizontally at the rate of $2 K g s^{- 1}$ , hits the block with a velocity of $6 {m s}^{- 1}$ . The initial acceleration of the block is:

Zero

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1.2 {m s}^{- 2}

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2.4 {m s}^{- 2}

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0.6 {m s}^{- 2}

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Solution

The correct option is C $2.4 {m s}^{- 2}$
$F = \frac{δ m}{δ t} v = 2 \times 6 = 12 N$
F=ma
$12 = 5 a$
$a = 2.4 m / s^{2}$

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A block of mass 5 Kg is at rest on a smooth horizontal surface. Water coming out of a pipe horizontally at the rate of 2 Kg s−1, hits the block with a velocity of 6ms−1. The initial acceleration of the block is:

The correct option is C 2.4 ms−2F=δmδtv=2×6=12NF=ma12=5aa=2.4m/s2

A block of mass $5 K g$ is at rest on a smooth horizontal surface. Water coming out of a pipe horizontally at the rate of $2 K g s^{- 1}$ , hits the block with a velocity of $6 {m s}^{- 1}$ . The initial acceleration of the block is:

The correct option is C $2.4 {m s}^{- 2}$
$F = \frac{δ m}{δ t} v = 2 \times 6 = 12 N$
F=ma
$12 = 5 a$
$a = 2.4 m / s^{2}$