EASY
10th ICSE
IMPORTANT
Earn 100

Draw a labelled sketch of a class III lever. Give one example of this kind of lever.

Important Questions on Machines

EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(A)>Q 7
A pair of scissors is used to cut a piece of cloth by keeping it at a distance of 8.0 cm from its rivet and applying an effort of 10 kgf by fingers at a distance2.0 cm from the rivet. How does the pair of scissors act - as a force multiplier or as a speed multiplier?
HARD
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(B)>Q 7
Define a gear system? Also explain its working.
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(B)>Q 2
A coolie uses a sloping wooden plank of given length 2.0 m to push up a drum of mass 100 kg into the truck at a height 1.0 m. How much effort is needed to push the drum up into the truck? What assumption have you made in arriving at the answer?
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(B)>Q 3
A gear system has one wheel with 10 teeth and the other wheel with 50 teeth. Calculate the acquired speed and the acquired torque that you can obtain using them. What will be the gear ratio in each case?
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(B)>Q 4
A gear system has the driving wheel of radius 2 cm and driven wheel of radius 20 cm. If the driven wheel has 40 teeth, find the number of teeth in the driving wheel. Given nA=100.
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(C)>Q 16
Draw a diagram of a combination of three movable pulleys with a fixed pulley showing the directions of load, effort, and tension in each strand. Find (i) mechanical advantage, (ii) velocity ratio, and (iii) efficiency of the combination in an ideal situation.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(C)>Q 1
A Single fixed pulley is used because it:
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(C)>Q 5
A block and tackle system has 5 pulleys. If an effort of 1000 N is needed in the downward direction to raise a load of 4500 N, calculate the velocity ratio.