Force and Pressure

The pressure applied at any point of a liquid at rest, in a closed system, will be distributed equally through all regions of the liquid.Name the law.
1. pascal's law
2. newton's law
3. gausian law
4. none of these
Which among the following is an application of pascal's law
1. hydraulic press
2. hydraulic lift
3. automobile brake system
4. all of these
rain drops are spherical in nature because of
1. surface tension
2. buoyant force
3. static pressure of liquid
4. pressure exerted by liquid
surface tension is a property of
1. solid
2. liquid
3. gas
4. all of these
the amount of force acting per unit length on the surface of a liquid is called
1. surface tension
2. buoyant force
3. static pressure of liquid
4. none of these
During a heavy storm, sailors pour soap powder or oil into the sea near their ship to
1. increase surface tension
2. decrease surface tension
3. increase buoyant force
4. decrease buoyant force
which of the following has lowest viscosity?
1. coconut oil
2. water
3. honey
4. none of these
When a liquid is flowing, there is a frictional force between the successive layers of the liquid. This force which oppose the relative motion of the layer is known as
1. buoyant force
2. frictional force
3. viscous force
4. none of these
CGS unit of viscosity is
1. pascal
2. newton
3. poise
4. kg m
friction is a
1. contact force
2. non-contact force
3. static force
4. none of these
friction force acts in
1. direction of force
2. opposite direction of force
3. both in direction and opposite direction
4. none of these
which of the following is/are the effect of friction
1. Friction opposes motion.
2. Friction causes wear and tear of the surfaces in contact.
3. Friction produces heat.
4. all of these
which of the following is a type of friction
1. sliding friction
2. rolling friction
3. kinetic friction
4. all of these
which of the following factors affect friction
1. nature of surface
2. weight of body
3. area of contact
4. all of these
If we apply a force against the direction of motion of a body, then the body will
1. stop moving
2. move with an increased speed
3. move with a decreased speed
4. move in a different direction
Pressure exerted by a liquid is increased by
1. the density of the liquid
2. the height of the liquid column
3. both of these
4. none of these
Which of the following liquids has more viscosity?
1. grease
2. water
3. coconut oil
4. ghee
correct order of friction is
1. static friction>rolling friction>sliding friction
2. static friction<rolling friction<sliding friction
3. static friction>rolling friction<sliding friction
4. static friction=rolling friction=sliding friction
Which of the following increases friction?
1. lubricant
2. trends on tyre
3. streamlining
4. polishing
A stone weighs 500N.Calculate the pressure exerted by it if it makes a contact with a surface area 25cm square.
1. 20*10 pa
2. 20*10^2 pa
3. 20*10^3 pa
4. 20*10^4 pa
In a hydraulic lift, the surface area of the input piston is 10 cm*cm. The surface area of thhe output piston is 3000 cm*cm.A 100N force is applied to the input piston raises the output piston.Calculate the force required to raise the output piston.
1. 3*10 N
2. 3*10^2 N
3. 3*10^3 N
4. 3*10^4 N