Posted by **jamie** on Saturday, March 24, 2012 at 9:47pm.

A high jumper wants to clear the bar at 2.1m. To do so he needs to raise his center of mass to a height of 2.4m. Assuming that air resistance can be neglected and his center of mass is 1.1m above the ground at take-off, determine the required vertical take-off speed.

- physics -
**Elena**, Sunday, March 25, 2012 at 3:25am
The jumper has to raise his center of

mass to the height of 2.4, i.e. to move

it by the distance of 2.4 -1.1 =1.3 m

From kinematics

h =Vo•t-g•t^2/2,

0=Vo –gt

Vo=sqrt(2•g•h) =sqrt (2•9.8•1.3) =5.05 m/s

## Answer this Question

## Related Questions

- physics - a high jumper approaches the takeoff point at a speed of 7.20 m/s. ...
- Physics..Urgent!!! - In the sport of pole vaulting, the jumper's point of mass ...
- physics - At a track-and-field meet, the best long jump is measured as 8.00 m. ...
- Physics - A high-jumper clears the bar and has a downward velocity of -6.00 m/s ...
- Physics(Please help) - A high-jumper clears the bar and has a downward velocity ...
- physics(help me with the angle) - In the 1968 Olympic Games, University of ...
- physics(I'm taking a different way to solve) - In the 1968 Olympic Games, ...
- Phys 1200 - I am doing my HW and I have a few questions I don't understand. Each...
- physics - A jumper of mass m=55 kg starts in a crouched position with the jumper...
- Physics - On a frictionless table, a glob of clay of mass 0.54 kg strikes a bar ...