Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Determine force on a body to pull or push:
Q: A wooden block having weight of 50N rests on the horizontal plane. Determine force required which is acted at an angle of 15° to just (a) Pull it, and (b) Push it. Take the coefficient friction = 0.4 between the mating surfaces. Also comment on the result.
Sol.: Let P1 be the force needed to just pull the block. In limiting equilibrium, forces are balanced. That gives
∑H = 0; F = P1cosθ
∑V = 0; R = W - P1sinθ
Also F = µR
µ(W - P1 sinθ) = P1cosθ
or P1 = µW / (cosθ + µsinθ)
= 0.4 × 50 /( cos 15° + 0.4 sinl5°)
= 18.70N .......Ans
(b) Let P2 be the force which is required to just push the block. With reference to free body diagram
Let us write equations of equilibrium,
∑H = 0; F = P2cosθ
∑V = 0; R = W + P2Sinθ
µ (W + P2sin θ ) = P2 cosθ
or P2 = µW / (cosθ - µsinθ)
= 0.4 × 50 /( cos 15° - 0.4 sinl5°)
= 23.17N .......Ans
Comments. It is easier to pull the given block than push it.
Explain the universal drilling machine The universal drilling machine, in this machine the arm itself can be rotated by a desired angle along a horizontal axis. This is in addi
Classification Of Welding Processes The classificated depending upon the nature of heat source and its movement resulting in spot, seam or zonal welds; or on the extent of heat
open die closed die
The three prototyping methods used are: a) R a p i dPrototyping: This is used to model the pins (large 1, 2 and small), lock disk and crank. b) CNCMachining: Use
Working Principle of Ignition System: An alternating current (AC) is generated when a magnet moves between two stationary coils. In a magneto, a coil of wires moves between two m
The de-oiled water from De-Oiling Unit enters the HLS vessel for softening. The primary function of HLS is to remove the Ca and Mg hardness and bring the total hardness to less tha
state bernouli''s theorem
Distinguish between microscopic and macroscopic approaches. Describe thermodynamic system. Differentiate between closed system, open system and an isolated system.
(a) Explain the procedure of removal for valves. (b) How should one remove valve guide from cylinder head? (c) What is the use of piston side base? (d) What is the use of
how water turbine workes
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd