Question

a block of mass 40g rests on a table . if the are of contact between the block and the table is 2cm squared calculate the pressure it exerts on the table

Answer 1

Answer:

Correct option is

C

1:4

Pressure is the force per unit area. So, P=F/A

Thus, minimum surface area (5cm×10cm) will give the maximum pressure and maximum area (20cm×10cm) will give the minimum pressure.

So, P

max

=

50×10

−4

2g

N/m

2

and P

min

=

200×10

−4

2g

N/m

2

Thus,

P

max

P

min

=50/200=1/4

The option C will be right.