Question

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Ans. (i) 121 J (ii) 100 J (iii) 5 W
Ans. (i) 79° (ii) 60° (iii) 180° (iv) 148.9%.
16. (i) Under a force of F = (10 i - 3 j + 6 k) newton a
body of mass 5 kg is displaced from the position
31
(6i+5j-3 k)metre to the position (10 i -23 +7k
metre. Calculate the work done.
-1
(ii) A force F = (4 i + j + 3 k) newton acts on a
4 +
k.
particle and displaces it through displacement
d=(11 i +11 j + 15 k) metre. Calculate the work
done.
nd
(iii) A force F = (5 î+ 4 î) newton displaces a body
· B
through d = (3j + 4 k) metre in 3s. Find the
re
A
power.
A​

Answer 1

Answer:

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Explanation:

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