Thursday

August 28, 2014

August 28, 2014

Posted by **jerf** on Sunday, January 16, 2011 at 8:44pm.

- physics -
**bobpursley**, Sunday, January 16, 2011 at 9:27pmDraw the diagram.

label the base of the ladder A, the top P, the corner O, and the cg C.

OA=3, AP=5, and you can compute OP as 4

OA^2+OP^2=AB^2

2 OA doa/dt +2 OP dop/dt=0 by taking the derivative (AB is a constant)

well, you know OA, OP, doa/dt=2, you can find dop/dt. At that instant, the center C has a velocity (1/2 doa/dt horizontal, and 1/2 dop/dt vertical)

so you have to add those two components as a vector

**Related Questions**

physics - a ladder AP of length 5m inclined to a vertical wall is slipping over ...

Physics - A Ladder of length L and mass m leans against wall at angle theta from...

math - A uniform ladder of length 2a and mass m lies on a vertical plane with ...

physics - A painter climbs a ladder leaning against a smooth wall. At a certain ...

Physics- PLEASE HELP - A painter climbs a ladder leaning against a smooth wall...

algebra - A ladder is resting against a wall. The top of the ladder touches the ...

trigo--help! - how do i do this question? a ladder length 13m rests against a ...

physics - Bill the firefighter stands on an 8 meter ladder of weight 355 Newtons...

physics - A painter climbs a ladder leaning against a smooth wall. At a certain ...

Physics- PLEASE HELP - A painter climbs a ladder leaning against a smooth wall. ...