To what height can a passenger car weighing 1 tonne be lifted using an internal energy equal to 30MJ.

m = 1 t = 1000 kg.

g = 10 m / s2.

Ev = 30 MJ = 30,000,000 J.

h -?

In order for the car to rise to the maximum height h, it is necessary, according to the law of conservation of energy, that when moving, all of its internal energy Ev is converted into potential energy En: Ev = En.

The potential energy of the car En is determined by the formula: En = m * g * h, where m is the mass of the car, g is the acceleration of gravity, h is the height of the body.

m * g * h = Ev.

h = Ev / m * g.

h = 30000000 J / 1000 kg * 10 m / s2 = 3000 m.

Answer: a passenger car can rise to a height of h = 3000 m.