Answer on Mechanics | Relativity Question for mia
horizontally, strikes it head on. The dart and the target together swing up 12 cm above the
initial level. What was the initial velocity of the dart?
V - initial velocity of the dart.
Consider the target and the dart didn't have the initial potential energy,
let's use the law of conservation of energy:
E1 = E2,
E1 - initial energy of the system,
E2 - energy of the system after the collision.
E1 = Ek - kinetic energy,
E2 = Ep - potential energy
m1*V2 = (m1 + m2)*g*h
V = sqrt((m1+m2)*g*h/m1)
V = sqrt((0.025+0.73)*9.8*0.12/0.025) = 5.96 m/s.
So, the initial velocity of the dart is 5.96 m/s.
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