Question

A block of weight 9.8 N is placed on a table. The table surface exerts an upward force of 10 N on the block. (Given g = 9.8 m/s2) This follows from:

• A. the block exerts a force of 10 N on the table.
• B. the block exerts a force of 19.8 N on the table.
• C. the block exerts a force of 9.8 N on the table.
• D. the block has an upward acceleration.

Answer 1

Answer: (A), (D)

The correct options are
A the block exerts a force of 10 N on the table.
C the block has an upward acceleration.
According to Newton's third law, if the table exerts 10N force on the block, the block will also apply same force on the table. As 9.8N<10N, the net force is in upward direction and thus, the block has an upward acceleration.
Ans:(A),(C)