Force and Press...

Change in the state of rest or of uniform motion is brought about by:

Anoop places a cuboid of dimensions $$12 cm \times 8 cm \times 6 cm$$ with different faces touching the table. Which face touching the table will have the greatest pressure exerted?

A tall vertical cylinder filled with water is kept on a horizontal table top. Two small holes A and B are made on the wall of the cylinder, A near the middle and B just below the free surface of water.

At sea-level, atmospheric pressure is

The pressure exerted by a force of $$50 \ N$$, normal to the nail of area $$1 \ mm^2$$ is

Two forces $$F_{1}$$ and $$F_{2}$$ are acting on a body. $$F_{1}$$ is a contact force. $$F_{2}$$ is a non - contact force. Then, the body (if at all moving) always moves in direction of

Which of the following statement is incorrect:

The U-tube acts as a water siphon. The bend in the tube is lm above the water surface. The tube outlet is 7m below the water surface. The water issues from the bottom of the siphon as a free jet at atmospheric pressure. Determine the speed of the free jet and the minimum absolute pressure of the water in the bend. Given atm pressure $$=1.01\times 10^5 \,N / m^2.g =9.8m  /s^2, p_w =10^3\, kg/g/m^3) $$

It is recommended that the air pressure in motor car tyres be reduced for a motion of the motor cars on sand because

The ratio of forces exerted by the larger piston to the smaller piston is