Sunday

September 21, 2014

September 21, 2014

Posted by **andrew** on Thursday, April 12, 2012 at 11:20am.

- physics (mechanics) -
**Steve**, Thursday, April 12, 2012 at 11:41amman velocity: x

boy velocity: b

1/2 (2m)x^2 = 1/2 * 1/2 my^2

4x^2 = y^2

1/2 (2m)(x+1.3)^2 = 1/2 my^2

2(x+1.3)^2 = 4x^2

x^2 + 2.6x + 1.69 = 2x^2

x^2 - 2.6x - 1.69 = 0

x = 3.138

check:

1/2 (2m)*3.138^2 = 1/2 * 1/2 m*6.276^2

9.847 = 1/2 * 19.694 = 9.847

1/2 (2m)*4.438^2 = 1/2 m*6.276^2

19.694 = 19.694

**Answer this Question**

**Related Questions**

science - A running man has half the kinetic energy of that of a boy of half of ...

physics - A father racing his son has half the kinetic energy of the son, who ...

Physics kinetic energy - Okay the equation for kinetic energy is = 1/2mv^2 so ...

Univ-Phys - One car has twice the mass of a second car, but only half as much ...

Physics - Two cars are moving. The first car has twice the mass of the second ...

physics - 7. Two cars are moving. The first car has twice the mass of the second...

Physics (algebra bit) - I do not see how to do this problem One car has twice ...

Physics Classical Mechanics - The figure below shows the experimental setup to ...

Physical Science-Can someone check my answers? - 1) The kinetic energy of an ...

physics - A man of mass 78.5 kg walks down the aisle of an airplane at a speed ...