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Author Question: A box is launched up a frictionless incline with an angle of elevation . The maximum height reached ... (Read 112 times)

burchfield96

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on: Jul 28, 2018
A box is launched up a frictionless incline with an angle of elevation . The maximum height reached by the box is h. The box is again launched up the incline with the same initial speed it had before, but this time the angle of elevation has been increased to . How does the maximum height H reached this time by the box compare with the previous value h?
 a. H = h b. H > h
  c. H < h d. H = ((sin)/(sin))

Question 2

A girl and her bicycle have a total mass of 42 kg. At the top of the hill her speed is 4.00 m/s. The hill is 14.3 m high and 112 m long. If the force of friction as she rides down the hill is 20 N, what is her speed at the bottom?
 a. 4.00 m/s
  b. 15.8 m/s
  c. 13.8 m/s
  d. 63.1 m/s
  e. She stops before she reaches the bottom.


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johnharpe

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Reply #1 on: Jul 28, 2018
Answer to Question 1

a

Answer to Question 2

c


burchfield96

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Reply #2 on: Jul 28, 2018
Thanks


johnharpe

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Reply #3 on: Jul 28, 2018
Welcome :)


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