Question

Calculate the force in Newton used by a girl who carried a bucket of water 30kg over a distance of 6m if she did a work of 84 Joules​

Answer 1

Answer:

There are two methods of solving this problem. The first method involves using the equation

where F=20.8 N, d=0.636 m, and Theta=0 degrees. (The angle theta represents the angle between the force and the displacement vector;  since the force is applied parallel to the incline, the angle is zero.) Substituting and solving yields

The second method is to recognize that the work done in pulling the cart along the incline at constant speed changes the potential energy of the cart. The work done equals the potential energy change. Thus,

W=Delta PE = m*g*(delta h) = (3.00 kg)*(9.8 m/s/s)*(0.45 m) = 13.2 J

Explanation:

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