A bullet of mass 15 g has a speed of 400 m/s. What is its kinetic energy? If the bullet strikes a thick target and is brought to rest in 2cm, calculate the average net force acting on the bullet. What happens to the kinetic energy originally in the bullet?
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1
Answer:
kinetic energy =half mv square
Answered by
1
Answer:
Mass = m = 15 g = 0.015 kg [ 1kg = 1000 g ]
Velocity = v = 400 m/s
K.E = 1/2 mv²
= 1/2 × 0.015 × 400 × 400 = 1200 Joules
Work done = K.E
W = 1200 J
W = F × s
s = 2 cm = 0.02 m
1200 = 0.02 F
F = 1200 / 0.02
F = 60000 N ==> Answer
The energy gets converted to Heat Energy .
Explanation:
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