A boy climbs on a pole of height 5 m. In doing so, he does 5000 J of work. Find his mass.
Answers
Answer:
100kg is the required answer.
Explanation:
According to the Question
It is given that ,
- Height ,h = 5m
- Work Done ,W = 5000J
We need to calculate the mass of the body.
As we know that , the acceleration due to gravity is 10m/s².
Here, the boy climb on a pole so, we calculate the work done against gravity.
- W = mgh
where,
W denote Work done
m denote mass
g denote acceleration due to gravity
h denote height
substitute the value we get
➻ 5000 = m × 5×10
➻ 5000 = m × 50
➻ 5000/50 = m
➻ 100 = m
➻ m = 100kg
- Hence, the weight of the boy is 100kg.
EXPLANATION:-
Given:-
Height= 5 m
Work done=5000 j
To be calculated=Mass of the boy
EXPLANATION:-
Using the formula of work done:-
w=mgh
w=Work done=5000 j
m=mass of the body=To be calculated
g=acceleration due to gravity =10 m/s²
h=height = 5 m
Let's put the given data in the formula we get :-
w=mgh
5000=m×10×5
5000=m×50
m=5000/50
m=100 kg
Hence the weight of the boy is 100 kg