# physics (please check work)

A uniform rod AB is 1.2 m long and weighs 16N. It is suspended by strings AC and BD. A block P weighing 96N is attached at E, 0.30N from A. The tension force in the string BD has a magnitude.

My work:
Taking torque around AC string
clockwise=counterclockwise
block P + Board force down= BD tension
(0.3m * 96N)+ (.6m * 16N)= BD (1.2m)
38.4= BD(1.2m)
BD= 32N

An 800N man stands halfway up a 5.0m long ladder of negligible weight. The base of the ladder is 3.0m from the wall. Assuming that the wall-ladder contact is frictionless, the wall pushes against the ladder with a force magnitude of:

my work:

cos (theta) = 3m/5m
theta= 53.13 degrees

horizontal components
Ff (friction foce on bottom) - FN (normal force on top) = 0

Ff=FN

vertical components:
Torque taken from top point of ladder
clockwise= counterclockwise
(800N X 2.5X cos(53.1))= FN(5)
FN=240N

Thank you

1. 👍 0
2. 👎 0
3. 👁 204
asked by Diane

## Similar Questions

1. ### Physics

a uniform rod of 3 kg and length 1 m is suspended from a fixed point by means of strings of length .8m and .6m which are attached to the free ends of the rod such that rod is horizontal. find the tensions in the string

asked by Ashley on September 19, 2011
2. ### phy

1. A Uniform rod AB 3m long weighing 3 Kg is held horizontally by two strong vertical strings at its ends. A weight of 7 kg is hanging on the rod at a distance of 1m from end A and another weight of 12 Kg is hanging at 0.5 m from

asked by shiva on August 24, 2010
3. ### physics

a 1.29 kg ball is connected by means of two massless strings to a vertical, rotating rod. The strings are tied to the rod and are taut. The tension in the upper string is 38 N. The length of both strings is 1.70m and the distance

asked by K on November 20, 2011
4. ### physics

A homogeneous rod AB=100 cm of mass m=4kg is suspended from a fixed roof by means of two very light strings OA and O'C having the same length point C is at 20cm from B , rod AB is in a horizontal position of equilibrium Make the

asked by sara on January 13, 2016
5. ### Physics

A uniform rod 1.2 m long has weight of 1000 dynes and 2000 dynes at its ends. At what point on the rod can it be balanced horizontally if the rod weighs 2500 dynes?

asked by Julie on July 19, 2015
6. ### Physics

A 1.34‒kg ball is attached to a rigid vertical rod by means of two massless strings each 1.70 m long. The strings are attached to the rod at points 1.70 m apart. The system is rotating about the axis of the rod, both strings

asked by Chrxeyshthoufov on February 23, 2014
7. ### physics

A uniform 1.3-kg rod that is 0.80 m long is suspended at rest from the ceiling by two springs, one at each end of the rod. Both springs hang straight down from the ceiling. The springs have identical lengths when they are

asked by sammie on December 1, 2010
8. ### Physics

A uniform rod is 4m long and weighs 10 kg.if it is supported on a knife edge at one metre from the end what weight placed at that end keeps the rod horizontal?

asked by priya on December 11, 2015
9. ### Physics

A uniform rod of 1m long of mass 50g is supported horizontally on two knife edges places 10cm from it ends.what will be reaction of this support when a 100g mass is suspended from the mid point of the rod

asked by Adetoun on November 6, 2018
10. ### physics

a heavy rod AB of length of 5m weighs 50N.The bar is supported in a horizontal position by two vertical strings X and Y.If string X is 0.6m from B and string Y is 1.8 from A,find the tension in the strings.

asked by somebody on June 10, 2017

More Similar Questions