Pseudo Force

Question

A man of mass 70 kg stands in an elevator accelerating upward at 2 m/s². What is the normal force exerted by the floor on the man? (g = 10 m/s²)

RankGuru · Accepted Answer

1. **Inertial Perspective**: The floor must push the man up with more than his weight to create an upward acceleration.
2. **Newton's Law**: $N - mg = ma$.
3. **Isolate Normal Force**: $N = m(g+a)$.
4. **Apply Values**:
   - $N = 70 	imes (10 + 2) = 70 	imes 12$.
5. **Result**: $N = 840$ N.
6. **Concept**: The man feels an 'apparent weight' greater than his real weight because of the acceleration.

Rank Guru

Pseudo Force

Select the correct option:

Solution

🔒 Solution Hidden from View

More pseudo force Practice Questions

In an accelerating car (a = 4 m/s² forward), a pendulum bob of mass 0.2 kg hangs at equilibrium maki...

Frame accelerates right with acceleration a. Pseudo force on mass m appears as:

Passenger in accelerating car feels pushed back due to:

About This Question