Question

A very large firecracker is ignited when at rest on the ground. Two pieces fly away from the explosion. The first has a speed of 4 m/s. The second has a speed of 6 m/s in the opposite direction. If the first piece has a mass of 0.3 kg, what is the mass of the second piece? a. 0.4 kg b. 0.6 kg c. 0.2 kg d. 0.1 kg e. 0.8 kg Determine the amount of energy that would have been released in the explosion described in the question above. a. 6 J b. 4 J c. 2 J d. 10 J e. 12 J 

          A very large firecracker is ignited when at rest on the ground.
Two pieces fly away from the explosion. The first has a speed of 4
m/s. The second has a speed of 6 m/s in the opposite direction. If
the first piece has a mass of 0.3 kg, what is the mass of the
second piece?
a. 0.4 kg   b. 0.6
kg   c. 0.2 kg 
 d. 0.1 kg   e.
0.8 kg
Determine the amount of energy that would have been released in
the explosion described in the question above.
a. 6 J    b. 4
J   c. 2 J 
 d. 10 J    e. 12
J
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Added by Kevin J.

University Physics with Modern Physics
University Physics with Modern Physics
Hugh D. Young 14th Edition
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A very large firecracker is ignited when at rest on the ground. Two pieces fly away from the explosion. The first has a speed of 4 m/s. The second has a speed of 6 m/s in the opposite direction. If the first piece has a mass of 0.3 kg, what is the mass of the second piece? a. 0.4 kg b. 0.6 kg c. 0.2 kg d. 0.1 kg e. 0.8 kg Determine the amount of energy that would have been released in the explosion described in the question above. a. 6 J b. 4 J c. 2 J d. 10 J e. 12 J
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Transcript

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00:01 Hi, let's see according to the principle of momentum, conservation, the magnitude of momentum of the piece are the same.
00:15 Therefore, 0 .3 into 4 equal to m into 6.
00:20 So, m equal to 1 .2 by 6 that is equal to 0 .2...
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