Question

Two blocks A and B are placed one over the other on a table. The mass of A is 5 kg and mass of B is 10 kg. Block A is placed on block B. What is the reaction the table gives onto the blocks? Gravity = 10m/s2
50 N upwards
100 N downwards
150 N upwards
50 N downwards
2. Two physics books A and B are placed one over the other on a table. The mass of A is 2 kg and mass of B is 1 kg. Book A is placed on book B. What is the reaction book B exerts onto book A? Gravity = 10m/s2
Answer
10 N downwards
20 N upwards
10 N upwards
20 N downwards

Answer 1

150 N upward for question 1

Answer 2

20N upward for question 2

Answer 3

reaction force is just equal n opposite to the weight of the object

Answer 4

because weight is a force too

Answer 5

reaction force is just equal n opposite to the weight of the object

Answer 6

20N upward for question 2

Answer 7

150 N upward for question 1