1. The ballistic pendulum is a simple device to measure projectile velocity v by observing the maximum angle 9 to which the box of sand with embedded projectile swings. Calculate the angle 8 if the 60 g. projectile is fired horizontally in to the suspended 20 kg box of sand with a velocity of 600 m/s. Also, calculate the percent energy lost during impact. Answer: (a) 0 = 20.7° (b) energy lost during impact = 99.8%

1. The ballistic pendulum is a simple device to measure projectile velocity v by observing the maximum angle 9 to which the box of sand with embedded projectile swings. Calculate the angle 8 if the 60 g. projectile is fired horizontally in to the suspended 20 kg box of sand with a velocity of 600 m/s. Also, calculate the percent energy lost during impact. Answer: (a) 0 = 20.7° (b) energy lost during impact = 99.8%

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1. The ballistic pendulum is a simple device to measure projectile velocity v by observing the
maximum angle 8 to which the box of sand with embedded projectile swings. Calculate
the angle 8 if the 60 g. projectile is fired horizontally in to the suspended 20 kg box of
sand with a velocity of 600 m/s. Also, calculate the percent energy lost during impact.
Answer: (a) 8 = 20.7° (b) energy lost during impact = 99.8%
Solution
2m

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This is the velocity of system at bottom.

Let the height gained by system be ℎ.

Hence,

M+mgh=1/2M+mv² ..........(how you get this equaltion)

l=2m (why is l is 2 m not h which is height)

h=l*2*cos degree ( where this equaltion from)

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