Question

NEW SONG
PERIODIC TEST-3
SUBJECT- PHYSICS and CHEMISTRY
CLASS-IX
Max Marks: 30
1.(a) Consider two children, say A and B. Let us say they weigh the same. Both
start climbing up a rope separately. Both reach a height of 8 metre. Let us
say A takes 15 seconds while B takes 20 seconds to accomplish the task.
(i) What is the work done by each?
(ii) The work done is the same. However, A has taken less time than B to do
the work. Give reason.
(iii) Who has done more work in a given time, say in one second?
(b) State law of Conservation of Energy
(c) A man pulls a block with a force of 200 N through 50 m in 1 min. Find
the power used by him to pull the block.
(3+1+1)​

Answer 1

Answer:

U should do your periodic test

U should answer it yourself