The C.G.S. unit of pressure is :

1. Pa
2. Nm^-2
3. dyne cm^-2
4. dyne cm²

One bar is equal to :

1. 10³ Nm^-2
2. 10⁴ Nm^-2
3. 10⁵ Nm^-2
4. 10⁶ Nm²

The pressure on a surface is reduced by :

1. using high thrust
2. increasing the area of surface
3. decreasing the area of surface
4. none of these

Cutting tools have either sharp or pointed edges so that a …………… thrust may cause a …………… pressure at that edges and cutting can be done with less effort.

1. high, high
2. small, small
3. high, small
4. small, high