Question
Thu July 26, 2012 By: Syohan
 

A block of metal weighing 2kg is resting on a frictionless plane. it is struck by a jet releasing water at the rate of 1 kg/sec and at a speed of 5m/s. the initial acceleration of the block is

Expert Reply
Thu July 26, 2012
Flow of water, q = 1kg/s
speed of water,v = 5m/s
Thus rate of momentum transfer: qv = 5 kgm/s^2 = force transferred.
mass of block, m  = 2 kg
Thus acceleration: 5/2  = 2.5 m/s^2
Ask the Expert