Calculate the work done to raise a granite plate 0.5m³ in volume to height 20m. The density of granite is 2500 kg/m³.
Answers
Answered by
23
Answer :-
Work done = 245 kJ
Explanation :-
Analyzing the question,
Given:
- Volume of granite plate = 0.5 m³
- Height = 20 m
- Density of granite plate = 2500 kg/m³
To find:
Work done = ?
Solution:
Here,
Work done = Gravitational potential energy.
Gravitational Potential energy = mgh
where:
- m is the mass of the object
- g is the acceleration due to gravity
- h is the height.
For finding the mass:
Mass = Density × Volume
⇒ Mass = 2500 × 0.5
⇒ Mass = 1250 kg
Applying the above formula of Gravitational potential energy,
Gravitational Potential energy = mgh
⇒ Gravitational Potential energy = 1250 × 9.8 × 20
⇒ Gravitational Potential energy = 245000 J
⇒ Gravitational Potential energy = 245 kJ
∴ Work done = 245 kJ
Answered by
0
Answer:
250kj
Explanation:
w=fs
= mg×h
=2500kg/M3 ×0.5m3 ×10m×20 m
= 2500 kg ×5×20 M2/s2
=2500 × 100
250000
250kj
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