The child drags the sled along a rectilinear horizontal path with a rope, forming an angle a = 30 with

The child drags the sled along a rectilinear horizontal path with a rope, forming an angle a = 30 with the horizon. rope tension T = 28N, sled speed v = 1.5m / s. what is the mechanical work performed by a boy in time t = 20 s?

To solve the problem, we need the formula:
A = F * S;
Now we need to express F:
F = T * cos a;
Now we express S:
S = V * t;
Let’s combine the formulas:
A = T * V * t * cos a;
Now let’s substitute the values into the formula:
A = 28 * 1.5 * 20 * 0.87;
A = 731 J.
Answer: A = 731 J.