Start Free Mock LoginAlready registered? Login here

Physics - NLM Question with Solution | TestHub

PhysicsNLMFBD & EquilibriumEasy2 minPYQ_2020

PhysicsEasysingle choice

A disc of mass $10 g$ is kept floating horizontally in the air by firing bullets, each of mass $5 g$ , with the same velocity at the same rate of $10$ bullets per second. The bullets rebound with the same speed in positive direction. The velocity of each bullet at the time of impact is $(Take g = 9.8 m s^{- 2})$

Options:

Answer:

Solution:

$2 m n v = M g$

$v = \frac{M g}{2 m n}$

$\Rightarrow u$ $= \frac{10 \times 980}{2 \times 5 \times 10} c m s^{- 1}$

$= \frac{9800}{100} c m s^{- 1}$

$= 98 c m s^{- 1}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:NLMSubtopic:FBD & Equilibrium

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...