Question

a block of mass 5 kg is at rest on a smooth horizontal surface water coming out of a pipe horizontally at a rate of 2 kg per second is the Block with a velocity of 6 metre per second acceleration of the block

Answer 1

Given,

m = 5 kg

rate of water (dm/dt) = 2 kg/sec

We know that,

$F = v \frac{dm}{dt} \\ \\ F = 6 \times 2 \\ \\ F = 12 N \textbf{According to newton's second law} \\ \\ F = ma \\ 12 = 5 \times a \\ \\ a =2.4 \ m\sec^{2}$