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Given mass, zero friction, mass of a projectile, direction and speed, find the recoil speed.

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A 78-kg ice hockey player standing on a frictionless sheet of ice throws a 6.0-kg bowling ball horizontally with a speed of 3.0 m/s. With what speed does the hockey player recoil? I need to see each step and formula to solve this question.

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Solution Summary

This solution shows the steps to calculating the recoil speed of a hockey player given mass, zero friction, mass of a projectile, direction and speed.

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Denote by M1 and M2 the mass of the ice hockey player and bowling ball, respectively. So, M1=78kg and M2=6kg. Denote by ...

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  • BSc , Wuhan Univ. China
  • MA, Shandong Univ.
Recent Feedback
  • "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
  • "excellent work"
  • "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
  • "Thank you"
  • "Thank you very much for your valuable time and assistance!"
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