HARD
10th ICSE
IMPORTANT
Earn 100

Draw diagrams to illustrate the positions of fulcrum, load and effort, in each of the following:
Forceps

Important Questions on Machines

HARD
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 3 - Machines>TEST YOURSELF>Q 10

Write the kind of lever as an example of the human body: In raising the weight of the body on toes.

HARD
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 3 - Machines>TEST YOURSELF>Q 10
Write the kind of lever as an example of the human body in the action of nodding of the head.
 
HARD
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 3 - Machines>TEST YOURSELF>Q 10
Write the kind of lever as an example of the human body :
In raising the load by the forearm. Also, show the position of load, effort and fulcrum in each case.
HARD
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 3 - Machines>TEST YOURSELF>Q 11
A man uses a crowbar of length 1.5 m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance of 1 m from his hand. Draw a diagram of the arrangement showing fulcrum (F), load (L) and effort (E) with their directions. State the kind of lever. Calculate:
(i) load arm,
(ii) effort arm,
(iii) mechanical advantage,
(iv) effort needed.
HARD
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 3 - Machines>TEST YOURSELF>Q 12
Give two reasons why efficiency of a single movable pulley system is not 100%.
HARD
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 3 - Machines>TEST YOURSELF>Q 13
Differentiate between a single fixed pulley and a single movable pulley.
HARD
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 3 - Machines>TEST YOURSELF>Q 14
How can you increase efficiency of a block and tackle pulley system ?