EASY
10th ICSE
IMPORTANT
Earn 100

Give two reasons why the efficiency of a single movable pulley system is not 100%.

Important Questions on Machines

MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(C)>Q 9
In which direction does the force need to be applied, when a single pulley is used with a mechanical advantage greater than one? How can you change the direction of force applied without altering its mechanical advantage? Draw a labelled diagram of the system.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(C)>Q 10
What is the velocity ratio of a single movable pulley?
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(C)>Q 11
In a single movable pulley, if the effort moves by a distance x upwards, by what height is the load raised?
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(C)>Q 12
Draw a labelled diagram of an arrangement of two pulleys, one fixed and other movable. In the diagram, mark the directions of all forces acting on it. What is the ideal mechanical advantage of the system? How can it be achieved?
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(C)>Q 13
The diagram below shows a pulley arrangement.
(a) In the diagram, mark the direction of tension on each strand of string.
(b) What is the purpose of the pulley B?
(c) If the tension is T, deduce the relation between T and E.
(d) What is the velocity ratio of the arrangement?
(e) Assuming that the efficiency of the system is 100%. What is the mechanical advantage?
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10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(C)>Q 14

State four differences between a single fixed pulley and a single movable pulley.

MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(C)>Q 15
The diagram alongside shows an arrangement of three pulleys A, B, and C. The load is marked as L and the effort as E.
(a) Name the pulleys A, B, and C.
(b) Mark in the diagram the directions of load (L), effort (E) and tension T1 and T2 in the two strings.
(c) How are the magnitudes of L and E related to the tension T1?
(d) Calculate the mechanical advantage and velocity ratio of the arrangement.
(e) What assumptions have you made in parts (c) and (d)?
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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.