What is the speed of the ball as it crosses home plate? Show your work. The next

Question

What is the speed of the ball as it crosses home plate? Show your work. The next two problems deal with a child riding on a merry-go-round. The 30 kg child is standing at a radius of 1 m from the center of the merry-go-round, which is spinning at a rate of 1 revolution every 2 seconds. What is the centripetal force acting on the child in order to keep them moving in this circle? If the coefficient of static friction between the child and merry-go-round is 0.095 is the force of friction alone enough to keep the child on the merry-go-round?

Explanation / Answer

Time taken for one complete rotation T = 2 s

Angular speed w = 2(pi) / T

                          = pi rad/s

                          = 3.1415 rad/s

Centripeatl force F = mrw 2

Where r = 1m

           m = 30 kg

So, F = 30 x 1 x 3.1415 2

         = 296 N

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.