Question
Physics Question on Escape Speed
A block of metal weighing 2 kg is resting on a frictionless plane (as shown in figure). It is struck by a jet releasing water at a rate of 1 kgs–1 and at a speed of 10 ms–1. Then, the initial acceleration of the block, in ms–2, will be:
A
3
B
6
C
5
D
4
Answer
5
Explanation
Solution
The correct option is(C): 5
F = ρ v 2 a
⇒ 10 × 1 = 2 × acceleration
⇒ Acc. = 5 m/s2