Wednesday

August 20, 2014

August 20, 2014

Posted by **jim** on Thursday, March 8, 2012 at 1:18pm.

Express your answer with the appropriate units

- physics -
**Elena**, Thursday, March 8, 2012 at 3:00pmThe motion of jumping person is similar to projectile motion:

H=(Vo)^2•(sinα)^2/2g

L=(Vo)^2•(sin2α)/2g=

=(Vo)^2•(2sinα•cosα)/2g.

2H/L=sinα/cosα,

tanα=2H/L=21.23/2=1.23

α=arctan1.23=50.9°

Vo=sqr(2gH)/ sinα=6.33 m/s.

t=2Vo•sinα/g=1 s.

**Related Questions**

physics - Calculate a person's hang time if he moves horizontally 2 m during a 1...

Physics! - Calculate the watts of power expended when a force of 2.0N moves a ...

Physics - When you jump upward, your hang time is the time your feet are off the...

Physics. - Calculate the tension in a horizontal string that whirls a 1.9-kg toy...

Physics - How many watts of power do you expend when you exert a force of 0.50N ...

Physics - Calculate the force of friction that keeps a 80-kg person sitting on ...

Physics - Calculate the tension in a horizontal string that whirls a 1.9-kg toy ...

physics - Calculate the water pressure at the bottom of the 50-m {\rm m}-high ...

Physics - In the vertical jump, Kobe Bryant starts from a crouch and jumps ...

Physics - If a person can have a hang time of .75 seconds, how long would it ...