a man weighing 80kg carries a weight of 40kg on the top of tower 60m high.find the work done by the man.Take g=10ms^-2
Answers
Answer:
pls mark as Brainlist
Explanation:
The work done by the man = 72000 J
Given :
➤ Mass of a man (m) = 80 kg
➤ Mass of man carries weight (m) = 40 kg
➤ Distance of tower (s) = 60 m
➤ Acceleration due to gravity (a) = 10 m/s²
To Find :
➤ Work done by the man (w) = ?
Solution :
◈ Total mass = 80 + 40 = 120 kg
To find work done by the man first we need to find the force required by man then after we find work done by the man.
As we know that
→ Force = ma
→ Force = 120 × 10
→ Force = 1200 N
Now ,
We find work done by the man \:
As we know that
→ Work done = f × s
→ Work done = 1700 × 60
→ Work done = 72000 J
Hence, the work done by the man is 72000 J.
Answer:
Given,
Mass of man = 80 kg
Weight carried = 40 kg
Height above ground h = 60 m
We have to find work done.
Explanation:
Total mass at top of tower = 80+40= 120 kg
For a body of mass m to raise to height h above earth,
Work done = potential energy stored = M × g × h
Let g = 10 ms-2
So, work done will be = 120×10×60 = 72,000 J
= 72 KJ