West Bengal Board Solutions for Chapter: Time and Motion, Exercise 8: Exercise 8
West Bengal Board Science Solutions for Exercise - West Bengal Board Solutions for Chapter: Time and Motion, Exercise 8: Exercise 8
Attempt the practice questions on Chapter 2: Time and Motion, Exercise 8: Exercise 8 with hints and solutions to strengthen your understanding. Environment and Science Class 7 solutions are prepared by Experienced Embibe Experts.
Questions from West Bengal Board Solutions for Chapter: Time and Motion, Exercise 8: Exercise 8 with Hints & Solutions
Put 10 books and 10 exercise books in your school bag. Now lift the bag from the floor onto the chair. Then lift it from the chair onto the almirah. Now answer the following questions.
I) Do you have to apply the same force in both cases against the pull of the earth(i.e. the weight of the bag)?
II) In which case you have to work more?
Case1: Put 10 books and 10 exercise books in your school bag. Now lift the bag from the floor onto the chair. Then lift it from the chair onto the almirah. Now answer the following questions.
Case2: Insert 10 books and 10 copies in the school bag. Lift it from the floor to the table. Now take out 10 copies and 5 books from the bag. Then put the bag down on the floor. Again, lift the bag onto the table. Now answer the following questions.
i) In which case do you have to apply more force against the weight of the bag?
ii) In which of the two cases have you done more work?
