If 3920 J are used to raise a 200-kg mass, how high is the mass raised?

1.75m

Explanation:

Given that,

mass = 200 kg

height by which mass was raised = ?

Energy required = 3420J

Apply the formula for calculating energy,

Energy = mass x acceleration due to gravity (g) x height

Energy = mgh

3420J = 200kg x 9.8m/s^2 x height

3420J = 1960kgm/s^2 x height

Height = 3420J / 1960kgm/s^2

Height = 1.75m

Thus, the mass was raised 1.75 metres high