Linear Momentum and Second Law of Motion: Practice Problem & Solution
A 5 kg block is resting on a frictionless plane, it is struck by a Jet, releasing water at the rate of 4 kg/sec emerging with a speed of 5 m/sec. Calculate the initial acceleration of block :
Short Solution (Best for NEET):
To solve this problem, we apply the core principles of Linear Momentum and Second Law of Motion. Understanding the underlying formula is key to arriving at the correct answer below:
Force acting on the object is F = v.(dm/dt)= 5×4 = 20 N
so Acceleration is a= F/m = 20/5 = 4 m/s²
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