Complete Question
The complete question is shown on the first uploaded image
Answer:
The value of the true strain at the onset of the necking is proved as,
Explanation:
From the question we see that necking begins when
Now we are told that
So substituting this into equation 1
But we are told in the question that So,
Dividing both sides with
We have
Answer:
The top of the block has an area of 0.25m².
i) a Calculate the pressure on the top face of the block.
ii) The atmospheric pressure is 1.0 × 10⁵ Pa.
Calculate the pressure on the top face of the block due to the depth h of water.
iii) The density of sea water is 1020kg/m³.
Calculate the depth h.
If an object experiences no net force, its velocity will remain constant. The object is either at rest and the velocity is zero, or it moves in a straight line with a constant speed.