On increasing the speed of a body to 2m/s it's kinetic energy is quadrupled. Then its original speed must be
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Answered by
8
Answer:
1 m/s
Explanation:
Kinetic energy is given as
K = 0.5mv²
From above
K ∝ v²
v ∝ √K
v₁/v₂ = √(K₁/K₂)
v₁ = v₂ × √(K₁/K₂)
= 2 m/s × √(K₁/(4K₁))
= 2 m/s × 1/2
= 1 m/s
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0
Answer:
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