Distribution of Pressure

Q.

A boy standing on one leg exerts more force than a boy standing on two legs.

1. True
2. False

Q. The SI unit of pressure is pascal (Pa).

1. True
2. False

Q. How is pressure related to force?

1. Inversely proportional
2. Directly proportional
3. Either A or B
4. Neither A nor B

Q.

A rectangular solid block has sides $4\times 10\times 20cm$and a density of $7.5gc{m}^{-3}$. If it rests on a horizontal flat surface, calculate the minimum and maximum pressure it can exert (in SI units). Also, calculate the thrust in both cases.

Q. The SI unit of pressure is pascal (Pa).

1. False
2. True

Q. Aryan whose mass is 60 kg is lying on his back on the beach. Find the pressure under his body if area of cross section on which he is lying is ${500cm}^2$.

Q.

A sharp knife cuts better than a blunt knife. Which of the following options gives the correct reason for this?

1. A sharp knife has more surface area and hence applies more pressure.

2. Blunt knife has a greater surface area in comparison to the sharp knife.

3. Sharp knives are usually made of silver which has more strength.

4. A sharp knife applies more pressure by virtue of its smaller contact surface.