A rigid body is one for which all the parts maintain the same positions relative to one another. I cannot deform or change shape in any way. It can only translate and rotate. It is an idealization. There is no such thing as a perfectly rigid body.
A deformable body is one that can distort. It would normally refer to a solid object so that as it deforms, it sort of deforms in a way that it could return to its starting shape if all the external forces were removed that caused it to deform. I don’t think of a blob liquid as being a deformable body even though a liquid can clearly deform. An object made of rubber is the idea that I have in mind for a deformable body.
Answer:
4D
Explanation:
We will use 2nd equation of motion in this question:
s = Vi t + (0.5)gt²
where,
s = distance covered
t = time taken
g = acceleration due to gravity
<u>For t = 1 s:</u>
s = D
Therefore,
D = (0 m/s)(1 s) + (0.5)g(1 s)²
D = 0.5g -------------- equation (1)
<u>For t = 2 s:</u>
s = D
Therefore,
s = (0 m/s)(1 s) + (0.5)g(2 s)²
s = 0.5g(4)
using equation (1):
s = 4D
therefore, correct answer is:
<u>4D</u>