A lift is moving down with an acceleration 20 m / s ∧ { 2 } . Which of the following is/are not true?

Physics - NLM Question with Solution | TestHub

PhysicsNLMMedium2 minQB

PhysicsMediummultiple choice

A lift is moving down with an acceleration $20 m / s^{\land} {2}$ . Which of the following is/are not true?

Options:(select one or more)

Answer:

A, B, D

Solution:

$N + 20 m cos 3 0^{\circ} = 5 kg cos 3 0^{\circ} N = 50 \times \frac{3}{2} - 100 cos 3 0^{\circ} N = - 50 \frac{3}{2}$

N can't be - ve N can be zero $_{7} N +$

$a = acceleration w.r.t. incline \Rightarrow 5 g sin 3 0^{\circ} - 20 m sin 3 0^{\circ} = ma 50 \times \frac{1}{2} - 100 \times \frac{1}{2} = 5 a = 25 - 50 = 5 a a = - 5 m / s^{2}$

Stream:JEESubject:PhysicsTopic:NLM

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...