ICSE Class 9 Answered
If a train moves 25km/sec and decrease to 15km/sec by applying brake in 5 sec then what will be the force of brake
Asked by sahuprabhat325 | 14 Dec, 2022, 08:39: AM
Given that,
Initial speed, u = 25 km/s
Final speed, v = 15 km/s
Time, t = 5 sec.
Now,

Now for the given case the retarding force will be given as F =ma.
i.e., F= m × 1000 N = m kN
Note: In this mass is unknown, to find the force, we need the magnitude of mass as well.
Answered by Jayesh Sah | 14 Dec, 2022, 10:27: AM
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