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If initial velocity is zero u = 0 WKT F= ma then 10N = 2* (v-0)/3 (pls simplify by ur self) ⇒v=15 m/s then K.E. = [1/2] * m * K.E. = [1/2] * 2 * 15² K.E. = 225j

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Given : force =10 N ..Mass = 2kg ....Time = 3s........
To find :- Kinetic energy............
Sol :- E (K) =1/2 ×m ×v (sq.).......... ..Let us find the acceleration for this object.......... Force = mass × acceleration. .....acceleration = force / mass....... = 10/2 = 5m/s....acceleration = 5 m/s......... Now find the velocity...... v = u-v / 2........so, we get as
V= 0-5/2....= 5/2...= 2.5 m/s....is the velocity..... Now E (K) = 1 / 2 × M × V ( SQ).....
1/2 × 3 × 2.5 ...= 3.75 joule..!!