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Author Question: A football kicker is attempting a field goal from 44m out. The ball is kicked and just clears the ... (Read 63 times)

Evvie72

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on: Jul 29, 2018
A football kicker is attempting a field goal from 44m out. The ball is kicked and just clears the lower bar with a time of flight of 2.9s If the angle of the kick was 45, what was the initial speed of the ball, assuming no air resistance?
 
  A) 39 m/s B) 2.2 m/s C) 21.5 m/s D) 19.7 m/s

Question 2

A marble moving 1.48 m/s rolls off the top edge of a 125-cm high table in a room where there is no appreciable air resistance and the free-fall acceleration is 9.80 m/s2. Neglect effects of air.
 
  (a) How far from the base of the table will it strike the floor? (b) How long will it be in the air?


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cuttiesgirl16

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Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

(a) 75.0 cm (b) 0.505 s


Evvie72

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

ricroger

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Reply 3 on: Yesterday
Wow, this really help

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