Answer:
A)196J
B)-208J
C)3467J
Step-by-step explanation:
We are given that a 20 kg cylindrical mass is dropped onto the mat from a height of 1 m above the mat. During the impact, the cylinder’s vertical velocity reaches zero at the instant the mat has compressed to only 4 cm thick.
So, The Mat gets compressed by : 10cm - 4 cm = 6 cm=0.06 m
a)
Using Conservations of energy
Potential energy at the top = Kinetic energy at the point before touching the surface
Kinetic energy = mgh= 
b)
Work done by the mat do to stop the fall of the cylinder =
C)
Work done=

F=3467J
The answer to this question is answer choice C.
For the SSS postulate, we need 3 pairs of congruent sides. However, in the image, there are only 2 pairs.
The missing pair in the image is AC and DF. If those are congruent, the triangle can be proven congruent by the SSS postulate.
Hope this helps! :)
~AgentCozmo4, Junior Moderator
Answer: 1044ft
Step-by-step explanation:
900ft2 + 144ft2
= 1044ft2 (square root)
1044ft
hope this helps :))
The answer is “=“. Both are different representations of the same fraction.