Answer:
The speed of the knife after passing through the target is 9.33 m/s.
Explanation:
We can find the speed of the knife after the impact by conservation of linear momentum:
Where:
: is the mass of the knife = 22.5 g = 0.0225 kg
: is the mass of the target = 300 g = 0.300 kg
: is the initial speed of the knife = 40.0 m/s
: is the initial speed of the target = 2.30 m/s
: is the final speed of the knife =?
: is the final speed of the target = 0 (it is stopped)
Taking as a positive direction the direction of the knife movement, we have:
Therefore, the speed of the knife after passing through the target is 9.33 m/s.
I hope it helps you!
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Answer:
1/3
Explanation:
Velocity ratio = distance moved by effort / distance moved by load
