Calculations for force, Mechanical Engineering

Assignment Help:

Calculations for force:

A square block having 25cm side and weighing 20N is hinged at point A and rests on rollers at point B as shown in the figure given below. It is pulled by string attached at point C and inclined at 300 with horizontal. Make calculations for force P to be applied so that block gets lifted off the roller only.

687_Calculations for force.png

Sol.: From Free body diagram the block is subjected to following set of forces.

1. Force P

2. Weight of block W

3. Reaction RA  at hinged point

4. When block is at the state of being lifted off the roller only, reaction RB  = 0

∑MA = 0

- Pcos30° × 0.25 - Psin30° × 0.25 + 20 × 0.125 = 0

- 0.22 P - 0.125P + 2.5 = 0

P = 7.27N                               .......ANS


Related Discussions:- Calculations for force

Show geographic constraints of the plant, Q. Show Geographic constraints of...

Q. Show Geographic constraints of the plant? The layout of process units will be influenced by the geographic constraints of the site. Spacing is required between plant facilit

Determine the cop and power required, In a 15 TR ammonia refrigerator plant...

In a 15 TR ammonia refrigerator plant the condensing temperature is 25 0 C and the evaporative temperature is -10 0 C. The refrigerant ammonia is subcooled by 50C before passing th

Projection of solids., draw the projection of pentagonal pyramid have 30 mm...

draw the projection of pentagonal pyramid have 30 mm edge and axis 50 mm long having base on hp and an edge of the box parallel to vp

Electron beam welding(ebw)-basic principle, BASIC PRINCIPLE OF ELECTRON BEA...

BASIC PRINCIPLE OF ELECTRON BEAM WELDING(EBW)   Electron beam welding which utilises a heat source of electrons which are accelerated by an electric field to mextremely high

Explain in detail about the large excavations, Explain in detail about the ...

Explain in detail about the Large excavations Large excavations required for construction of rafts may need dewatering, depending on the ground water flow and the choice of  a

Calculate the motor efficiency, A 4- pole DC motor is known to have an arma...

A 4- pole DC motor is known to have an armature resistance of 0.5 Ω, and is operated as a separately excited motor. (a)  When the motor is connected to a 250V DC supply with no

What is the combined stiffnes, A competitor in a hill-climb event finds dur...

A competitor in a hill-climb event finds during practice that his car becomes airborne at a particular point on the hill.  Shortly after landing the lowest point in the car just co

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd