A load of 100 N is lifted by an effort of 25 N. Mechanical advantage is:
A75
B0.25
C4
D125
Answer & Solution
Correct answer: C. 4
1. M.A. = load / effort.
2. = 100 / 25 = 4.
3. So mechanical advantage is 4.
4. The machine multiplies the applied force four times.
_Source: Selina Concise Physics ICSE Class 10, Ch 3 'Machines' (aplustopper.com extract)_
Related questions
Why does increasing the length of an inclined plane reduce effort?In an ideal block and tackle with 5 strings supporting the load, the effort needed to liftA force multiplier always has:Which of the following has M.A. of 1?A boy can apply effort of 100 N. If he wants to lift a 400 N load, the M.A. of the machineIf a 200 N load is lifted 0.5 m using a 50 N effort moving 2 m, find efficiency:In a Class I lever the effort arm is 60 cm and the load arm is 20 cm. Mechanical advantageA pulley arrangement has 3 movable and 1 fixed pulley. Ideal V.R. is: