40 কেজি ভরের একটি রকেটে 160 কেজি জ্বালানি রয়েছে। জ্বালানির নিষ্কাশন বেগ হল `2.0km//s`।

A rocket of mass 40kg has 160kg fuel. The exhaust velocity of the fuel is 2.0km//s . The rate of consumption of fuel is 4kg//s . Calculate the ultimate vertical speed gained by the rocket. (g=10m//s^2)

Aparticle is projected from the surface of the earth with an intial speed of 4.0 km//s .Find the maximum height attained by the particle. Radius of earth = 6400km g = 9.8 m//s^(2) .

Two trains travelling on the same track are approaching each other with equal speed of 40 m//s . The drivers of the trains beging to decelerate simultaneously when just 2.0 km apart. Assuming deceleration to be uniform and equal the value to the deceleration to barely avoid collision should be .

Ab object covers (16.0 pm 0.4) m distance in (4.0 pm 0.2) s. Find out the second.

A railway engine weighing 40 metric ton is travelling along a level track at a speed of 54 km H^(-1) What additional power is required to maintain the same speed up an incline of 1 in 49 Take g = 9.8 m//s^(2) and m u = 0.1 .

A train starts from station 'A'.It has to stop at station 'B' 1.4km apart.The maximum possible speed and maximum possible rate of change of speed of train are 40m/s and 2m/s^(2)" respectively.The minimum time taken by it to reach station B is 10T sec.Given that maximum possible retardation is 0.8m/s^(2) . Find T.