HELP ME PLEASE A motor is used to lift a 10 kg mass 2 m above the ground in 4 s. If the power input to the motor is 100 mathbb W what is the efficiency of the motor?
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reserve is the answer

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

i believe the answer is electric potential.

explanation: