Start Free Mock LoginAlready registered? Login here

Physics - NLM Question with Solution | TestHub

PhysicsNLMFrictionMedium2 minQB

PhysicsMediumsingle choice

Two blocks A (5 kg) and B (10 kg), joined by a massless spring, rest on a rough horizontal surface ( $μ = 0.2$ ). A horizontal force $F = 100$ N pulls block B. At an instant when A has acceleration $8$ m/s², the acceleration of B is: (Take $g = 10$ m/s²)

Options:

Answer:

Solution:

Spring force
$F_{s} = 5 (8) + 0.2 (5) (10) = 50 N .$
On B
$100 - 50 - 0.2 (10) (10) = 10 a_{B}$
so
$a_{B} = \frac{30}{10} = 3 m/ s^{2} .$
Option B.

Subject:PhysicsTopic:NLMSubtopic:Friction

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...