Advertisements
Advertisements
Question
Why is a jack screw provided with a long arm?
Advertisements
Solution
A jack screw is provided with a long arm in order to have the effortless than the load. According to the principle of moments, load x load arm = effort x effort arm. So, if the load arm is more, then the effort will be more than the load.
APPEARS IN
RELATED QUESTIONS
Give reasons for the following A teacher moving around in the class is doing work but a child standing and reading a book is not doing any work.
A man lifts a mass of 20 kg to a height of 2.5 m. Assuming that the force of gravity on 1 kg mass is 10 N, find the work done by the man.
Nm is the unit of .......
On what factors does the work done by a force depend?
No work is done by a man moving on a horizontal road while carrying a box on his head. Explain.
Calculate the amount of work done by a child carrying a bag of 20 kg when he moves a distance of 40 m in
(a) Vertical direction, and
(b) Horizontal direction
Give an example
Electrical energy changes of sound energy.
In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?
A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?
