Q. A train is moving with velocity 20 m/s on this dust is falling at the rate 50kg/min. The extra force requested to move this train with a constant velocity will be
A) 16.66 N
B) 1200 N
C) 1000 N
D) 166.6 N
Explanation
(a) $F = u\left( \frac{dm}{dt} \right)$
$= 20 \times \frac{50}{60}$
$= 16.66\ N$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.