The boy pulls the sled with a force of 50 N directed at an angle of zo degrees, the sled moves evenly and travels

The boy pulls the sled with a force of 50 N directed at an angle of zo degrees, the sled moves evenly and travels 30 m in a minute what power does the boy develop

F = 50 N.
∠α = 30 °.
t = 1 min = 60 s.
V = const.
S = 30 m.
N -?
Power N is called the speed of performing mechanical work by the force. Power is determined by the formula: N = A / t.
A boy to move the sled performs mechanical work, which we express by the formula: A = F * S * cosα, where F is the force with which the boy pulls the sled, S is the movement of the sled under the boy’s action, ∠α is the angle between the direction of the boy’s force and the movement sled S.
N = F * S * cosα / t.
N = 50 N * 30 m * cos30 ° / 60 s = 21.65 W.
Answer: the boy develops a power of N = 21.65 W.