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Figure shows the vertical section of a f...

Figure shows the vertical section of a frictionless surface. A block of mass `2kg` is released from rest from position A, its KE as it reaches position C is (`g=10ms^-2`)

A

(a) `140J`

B

(b) `180J`

C

(c) `120J`

D

(d) `280J`

Text Solution

Verified by Experts

The correct Answer is:
A
Decrease in height, `h=14-7=7m`
Also KE at C=Loss in PE=`mgh=140J`
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