NCERT Solutions for Class 11 Science Work energy and power 4
Important Board Questions
Work energy and power
NCERT Books for Session 2022-2023
CBSE Board and UP Board
2 Marks Questions
How high must a body be lifted to gain an amount of P.E. equal to the K.E. it has when moving at speed 20 ms⁻¹. (The value of acceleration due to gravity at a place is 9.8 ms⁻²).
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mgh = mv²/2
so h = 20.4 m