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  • A block of metal weighing is resting on a frictionless plane (as shown in figure). It is struck by a jet releasing water at

A block of metal weighing 2 \mathrm{~kg} is resting on a frictionless plane (as shown in figure). It is struck by a jet releasing water at a rate of 1 \mathrm{kgs}^{-1} and at a speed of 10 \mathrm{~ms}^{-1}. Then, the initial acceleration of the block, in \mathrm{ms}^{-2}, will be :

Option: 1

3


Option: 2

6


Option: 3

5


Option: 4

4


Answers (1)

best_answer

\mathrm{F=\frac{d m}{d t} \times v=\rho v^{2} a}

\mathrm{F=\text { mass } \times \text { acceleration }}

on comparing

\mathrm{1\times 10=2 \times \text { acceleration }}

\mathrm{acceleration = 5 m/s^{2}}

Hence, correct answer is Option (3)

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