Amotor has the electrical energy equivalent to 400. joules of work. it can lift a 5.0 kg mass 2.0 meters. calculate the work done by the motor.

Answer : Work done, W = 98 J.

Explanation :

It is given that,

The electrical energy equivalent to 400. joules of work.

The mass that is lifted by the motor, m = 5 kg

Height, h = 2 m

The work done by the motor is given by :

g is acceleration due to gravity

So, the work done by the motor is 98 J

Hence, this is the required solution.  

the answer is b i think