Physics
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.
- high, high
- small, small
- high, small
- small, high
Answer
small, high
Reason — For a given thrust, the pressure on a surface is increased by reducing the area of surface on which it is acting, hence, cutting tools have either sharp or pointed edges so that a small thrust may cause a high pressure at that edges and cutting can be done with less effort.
Related Questions
1 atm of pressure is equal to :
- 0.076 m of Hg
- 760 torr
- 76 torr
- 7.6 mm of Hg
The pressure on a surface is reduced by :
- using high thrust
- increasing the area of surface
- decreasing the area of surface
- none of these
The pressure inside a liquid of density ρ at a depth h is:
- hρg
- h/ρg
- hρ/g
- hρ
Out of the following, which one is correct about the law of liquid pressure ?
- Pressure is different in all directions about a point inside the liquid.
- In a stationary liquid, pressure is different at all points on a horizontal plane.
- Inside the liquid, pressure decreases with an increase in depth from its free surface.
- It increases with an increase in the density of the liquid.