Question

Three pulley system A, B & C are used to lift a load of 100N. Considering all of them as ideal machines, answer the following LOAD 6a. The effort needed to lift the load in A, B & C are respectively 1. 100N, 100N, 100N 2 100N, SON, 100N 3. 50N, 50N, 10ON 4.100N, SON, 50 6 b. The mechanical advantage of the pulleys are such that 1. MA(A)MA(B)-MA(C) 2. MA(A)MA(B)-MA(C) 3, MA(A) MA(B)-MA(C) 4 MA(A)MA(B) MA(C) 5. MA(A)-MA(B) MA(C) 6.c. Velocity ratio of 1.A=B 2C=A 3C=B 4A=B=C 5. C #B 6. d. The efficiency of all three pulley system is 100%. Choose the correct answer, 1. True 2. False 3. Can't say 4. Data is insufficient​

Answer 1

Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.