A person of mass 60 kg stands on a weighing scale in an elevator accelerating upward at 2 m/s² (g=10). The reading is MCQ with Answer and Explanation

A person of mass 60 kg stands on a weighing scale in an elevator accelerating upward at 2 m/s² (g=10). The reading is
A. 48 kg
B. 60 kg
C. 72 kg
D. 120 kg
Answer: Option C
Solution (By JKSSB Mock Tests)
Apparent weight = m(g+a) = 60×(10+2) = 720 N, which corresponds to 72 kg mass on scale (if scale calibrated in kg under g=10). Reading 72 kg. Downward acceleration would reduce.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1
Potentiometer sensitivity increased by:
A. Thicker wire
B. Shorter wire
C. Longer wire
D. Higher current

Correct Answer: Option C


Explanation:
Longer wire ⇒ smaller potential gradient (V/cm) ⇒ finer voltage measurement ⇒ higher sensitivity. Memory tip: 'Sensitivity ∝ wire length; smaller gradient = better resolution'. Experimental physics concept frequently tested in competitive exams.

This question belongs to: Science Physics
Question #2
The relative permeability of a ferromagnetic material is
A. Slightly greater than 1
B. Very large
C. Exactly 1
D. Slightly less than 1

Correct Answer: Option B


Explanation:
Ferromagnetic materials have μ_r >> 1 (hundreds to thousands). Paramagnetic slightly >1, diamagnetic

This question belongs to: Science Physics
Question #3
The law of conservation of energy states that
A. Energy can neither be created nor destroyed, only transformed
B. Energy can be destroyed but not created
C. Energy can be created but not destroyed
D. Total energy always increases

Correct Answer: Option A


Explanation:
First law of thermodynamics: Energy is conserved in an isolated system. It changes forms (kinetic to potential etc.) but total constant. Perpetual motion machine impossible.

This question belongs to: Science Physics