Answer:
b) 0.1 mm
Explanation:
Given that
E= 1 x 10¹⁰ N/m²
F= 4 N
d= 0.5 mm
L = 60 mm
We know that elongation due to force F given as



ΔL = 0.12 mm
Therefore the answer is -
b) 0.1 mm
Buoyancy is a force that always acts in an upward direction exerted by a fluid on a body placed in the fluid
Hope this helps :)
The answer is 12.5 kg because 250N / 20m/s^2
I hope that helped
I think B is the most correct, because logically it's harder to bend a stiffer spring than it is to bend a softer one. Also, I don't think length comes into play. So B.