Question

E4.Suppose Galileo’s pulse rate was 75 beats per minute. How many beats per second is this? What is the time in seconds between consecutive pulse beats? How far (in meters) does an object fall in this time when dropped from rest? What is this distance in feet (use the conversion factors on the inside front cover)?

Answer 1

Answer

given,

Galileo's pulse rate = 75 beats per minutes

Beats per second

1 minutes = 60 s

pulse rate = $\dfrac{75}{60}$

                  = 1.25 beats/s

times in second

$t = \dfrac{1}{1.25}$

      t = 0.8 s/pulse

distance of the object

initial velocity = 0 m/s

$s = ut + \dfrac{1}{2}gt^2$

$s = \dfrac{1}{2}\times 9.8\times 0.8^2$

      s = 3.14 m

distance in feet

  1 m = 3.28 ft

 3.14 m = 3.14 x 3.28 ft

             = 10.3 ft

distance in feet is equal to 10.3 ft.