Question

1.    A 15kg block of wood is at the top of the table. What is the normal force exerted by the table on the block?

 

a.    741N                                            c. 1.53N

b.    147N                                            d. 24.8N

 

Answer 1

Given:

$m=\rm 15\: kg$

$g=9.8\rm\: m/s^2$

The normal force reaction exerted by the table on the block is given by

$$N=mg=\rm 15\:kg*9.8\: m/s^2=147\: N$$