Question

A person lift a 4.7 kg cement block a vertical distance of 1.2 m and then carries the black horizontally a distance of 7.7 meters. the acceleration of gravity is 9.81 m a second squared. Determine the work done by the force of gravity in the process

Answer 1

The work done by the force of gravity is equal to the gravitational potential energy, which is 56.36 joules.

Step-by-step explanation:

In order to determine the work done by the force of gravity when lifting the cement block, we need to calculate the gravitational potential energy.

The formula for gravitational potential energy is

PE = mgh,

where m is the mass of the object, g is the acceleration due to gravity, and h is the vertical distance lifted.

Given that the mass of the cement block is 4.7 kg, the vertical distance lifted is 1.2 m, and the acceleration due to gravity is 9.81 m/s^2, we can substitute the values into the formula to calculate the potential energy:

PE = (4.7 kg)(9.81 m/s^2)(1.2 m) = 56.36 J.

Therefore, the work done by the force of gravity is equal to the gravitational potential energy, which is 56.36 joules.