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A constant force of 5 N is applied on a ...

A constant force of 5 N is applied on a block of mass 20 kg for a distance 2 0 m. The kinetic energy acquired by the block is

A

20 J

B

15 J

C

10 J

D

5 J

Text Solution

Verified by Experts

The correct Answer is:
C
Acceleration, ` a = (5)/( 20) = (1)/(2) m s^(-2)`
` v = sqrt( 2 as) = sqrt((2 xx 2)/(4))= 1 m// s `
KE `= (1)/(2) mv^(2)`
` = (1)/(2) xx 20 xx (1)^(2) = 10 J`
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