Answer:
The answer to your question is Work = 784.8 Joules
Step-by-step explanation:
Data
mass = 20 kg
height = 4 m
time = 10 s
Mechanic work is defined as the force applied to a body so it moves a distance.
Formula
Work = force x distance
Process
1.- Calculate the force
Force = mass x gravity
-Substitution
Force = 20 x 9.81
-Result
Force = 196.2 N
2.- Calculate the Work
Work = 196.2 x 4
-Result
Work = 784.8 Joules