A toy rocket of mass 0.1 kg hass a small fuel of mass 0.02 kg, which it burns out in 3s. Starting from rest on a horizontal smooth track, it gets a speed of `20ms^(-1)` after the fuel is burnt out. What is the approcimate thrust of the rocket ? What is the energy content per unit mass of the fuel ? (Ignore the small mass variation of teh rocket during fuel burning).

A toy rocket having mass 0.2 has a small fuel of mass 0.04 kg which it burna out in 6 s. Starting from rest on a horizontal smooth track , it gets a speed of 40 m/s after the fuel is burnt out completey . What will be the approximate thrust of the rocket ? What is the energy content per unit mass of the fuel ? (Ignore the small mass variation of the rocket during fuel burning )

A rocket is ejecting a mass m of gases per unit time with velocity V relative to the rocket, the thrust on the rocket is:

A trolley of mass 10 kg carries 16 kg grain and moves on a horizontal smooth and straight track at 20ms^(-1) . If the grain start lenking out of a hole at the bottom at time t = 0_(sec) . At the rate of 0.5 kgs^(-1) the speed of the trolley at t= 22s will be nearly

A rocket motor consumes 100 kg of fuel per second exhausting it with a speed of 6 xx 10^(3) ms^(-1) What thrust is exerted on the rocket ? What will be the velocity of the rocket at the instant its mass is reduced to (1 // 40) of its initial mass ? Take initial velocity of rocket as zero . Neglect gravity .

The fuel in a rocket is burnt at the rate of 50 kg/s and the gases are ejected at the rate of 6 xx 10^4m/s with respect to the rocket, What is the thrust developed?

The rate of mass of the gas emitted from the rear of a rocket is initially 0.1 kg//s . If the speed of the gas relative to the rocket is 50 m//s and the mass of the rocket is 2 kg , then the acceleration of the rocket in m//s^(2) is