A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby weighs 12 N. The carriage has ___ energy. Calculate it.

252 Joules.

Explanation:

From the question, we can deduce that baby carriage isn't moving and as such possess energy due to its position. This ultimately implies a gravitational potential energy.

Potential energy can be defined as an energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

Where, P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

Given the following data;

Height = 21m

Weight of carriage with baby = 12N

But we know that weight = mg = 12N

Substituting into the equation, we have;

Therefore, the energy possessed by the carriage is 252 Joules.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.