Plz solve Qno. 11 x
m. a, supports
length d the cracker.
through a distance 60 cm. when a bad o'
o' (i) volocity ratio mechanical advantage (iii) efficiency
A applying an offOrt of 100 N in the downward
Mare •n tho fiau'O.
ratio 01 tho machine?
d omc.oncy of tho machine.
(Ans. b. 1 c. 0.9 d. 900/01
Calculate (i) velocity ratio (ii) mechanical advantage (iii) efficiency of a machine which overcomes
a of 300 N through a distance 01 0.12 m when an effort of 100 N acts through a distance
(Ans. (i) 4 (ii) 3 75%1
of 048 m,
A pal' of is uood to cut a cloth placed 2 cm trom the rivet. A force Of 6 kgf is applied by the
finger' from the rivet. What is the resistance offered by the cloth?
(Ans. 165 kgf1
A pulley systom has five pulleys in all and is 75% efficient. Calculate (a) MA (b) an effort required to
lit' a o' 1875 N (c) tho resistarwe due to movable parts of the pulley system.
[Ans. (a) 3.75 (b) 500 N (c) 625 NI