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Given the displacement of the body as x ...

Given the displacement of the body as x = (2t^4 + 5)m and mass is 2 kg. What is the increase in K.E. in one second :

A

8 J

B

16 J

C

32 J

D

64 J

Text Solution

Verified by Experts

The correct Answer is:
d
Given `x=2r^(4)+5:.(dx)/(dt)=8r^(3)implies v=8t^(3)`
`:.` Velocity after 1 second = 8m/s.
Now `K.E."1/2mv^(2)=1/2xx2xx(8)^(2)=64 J`
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