A 2 kg block is lifted vertically 2 m by a man What is work done by the man?
1 answer:
Answer:
Work done, W = 39.2 J
Explanation:
It is given that,
Mass of the block, m = 2 kg
The block is lifted vertically 2 m by the man i.e the distance covered by the block is, h = 2 m. The man is doing work against the gravity. It is given by :
Where
g is acceleration due to gravity
W = 39.2 J
So, the work done by the man is 39.2 J. Hence, this is the required solution.
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Answer:
If you have 8 Joules of energy that means you have 1.912 calories.
Explanation:
As we know that one calorie is equal to 4.184 J. We need to calculate in 8 Joules of energy how many calories are present.
We know that,
For 1 calorie = 4.184 J
For ? = 8 Joules
To obtain calories in 8 Joules. Divide 8 by 4.184.
calorie=1.912
Therefore, 8 J = 1.912 calorie.