Question

If Michael Jordan has a vertical leap of 1.29 m, then what is his takeoff speed?

Answer 1

Explanation:

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11th

Physics

Motion in a Straight Line

Problems on Equation of Motion

If Michael Jordan has a ver...

PHYSICS

If Michael Jordan has a vertical leap of 1.29m, then what is his hang time (total time to move upwards to the peak and then return to the ground)?

A

2.03s

B

1.03s

C

0.03s

D

1.0s

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CALCULATOR

Enter the know values to find unknown

Acceleration

Distance

Final Velocity

v = u + a*t

Initial Velocity u

m/s

Final Velocity v

m/s

Time t

s

Acceleration a

m/s²

RESET VALUES

ANSWER

Given, acceleration a=−g=−9.8m/s2(minus sign for motion against gravity); final velocity (top most point) is v=0m/s

Vertical distance traveled d=1.29m

If u be the initial velocity, using formula v2−u2=2ad

02−u2=2(−9.8)(1.29)

⟹ u=5.03m/s

If t be the time to peak. 

Using v=u+at

 0=5.03−(9.8)t

We get  t=5.03/9.8=0.513s

So, the hang time will be double of peak time i.e. thang=2×0.513=1.03s 

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