Question

(A) Tick () the correct answer in the given alternatives.
1. What is the efficiency of a perfect machine?
(i) 100% (ii) 90% (iii) 80% (iv) 50%
2. Which work is done by effort?
(i) Input work (ii) Output work (iii) Both (iv) None of them
3. Which is not affected by friction?
(i) Mechanical advantage (ii) Velocity ratio
iii) Efficiency
(iv) None of them
4. What is the velocity ratio of a movable pulley?
(i) One
(ii) Two
(iii) Three (iv) Four
5. To lift a load in a truck of 2 m height, a wooden plank of 6 m long
is made inclined. What would be the velocity ratio of that inclined
plane?
(i) One (ii) Two (iii) Three (iv) Four




write down the factors on which moments depend upon?


Guys do you know how to do numerical problems of science subject? plz give correct answer.​

Answer 1

Answer:

1. 90% ✔
2. Output Work ✔
3. None of them ✔
4. one ✔
5. Two ✔

Answer 2

Explanation:

REFER TO THE ATTACHMENT FOR THE ANSWER