A stone of mass 4 kg is dropped from a height. Find the force exerted by it on ground if acceleration due to gravity is 10 m/s2.
Directions: Match Column-I with Column-II and select the correct answer using the codes given below the columns.
Direction: The questions in this segment consist of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below.
Assertion: Sea divers wear special suits.
Reason: There is no effect of gravity under the sea.
DIRECTIONS: Read the passage given below and answer the questions that follow. Passage Liquid pressure in a container doesn't depend on the shape of the container but it any depends on the height of the liquid column. The pressure due to a liquid at a point at a depth h from the surface of the liquid is given by P = ρgh where, ρ is the density of the liquid and g is the acceleration due to gravity. A cylindrical container is full of water. The pressure at the bottom is P. Now, the water is replaced by cooking oil of density twice the density of water. If half of the water is taken out, what is the pressure at the bottom?
Force is a
A force of 12 N is acting perpendicular on a wooden block. What will be the thrust on it?
Assertion: Steel nails are pointed at one end to have least area of contact with surface.
Reason: Least area exerts high pressure.
A stone falling from the roof of a house due to
How much pressure will be applied on a body. If a force of 4 N is applied on its unit surface area. [Hint: Area = 1 m2]
The CGS unit of force is
Assertion: Apple falls on the ground, due to gravitational force.
Reason: Gravitational force is a contact force.
Which instrument is used for measuring at mospheric pressure?
Assertion: When a stone is thrown vertically upward, after getting a certain height' it comes back to the earth.
Reason: Stone has to work against the force of friction of air.
When a force of 10 N is applied on a body it starts moving with a constant acceleration of 2m/s2. The mass of the body is
The SI unit of force is
Assertion: A moving toy car stops after a little distance.
Reason: Friction opposes the motion.
Assertion: There is high atmospheric pressure in the space.
Reason: Astronauts wear special suits.
As we go to the higher altitude the atmospheric pressure _______.
Assertion: Magnetic force is a non-contact force.
Reason: Unlike poles of magnet attracts each other.
1 newton = _______ dynes.
Electrostatic force is a
DIRECTIONS: Read the following two statements carefully and choose the correct options.
Statement-1: Atmospheric pressure increases with increase in depth of sea.
Statement-2: Pressure is directly proportional to depth/height.
Two stones A and B of masses 2 kg and 5 kg respectively are released from same height in vacuum. Which will reach on the ground first?
When a cricketer catches the ball by his hands the force/forces coming in action is/are
Force has
A mass of 2 kg is accelerated at 2 m/sec2. Find the force applied on it.
Pressure is the ratio of force to the ____over which it is applied.
DIRECTIONS: Read the passage given below and answer the questions that follow. Passage Liquid pressure in a container doesn't depend on the shape of the container but it any depends on the height of the liquid column. The pressure due to a liquid at a point at a depth h from the surface of the liquid is given by P = ρgh where, ρ is the density of the liquid and g is the acceleration due to gravity. A cylindrical container is full of water. The pressure at the bottom is P. Now, the water is replaced by cooking oil of density twice the density of water. The new pressure at the bottom is
Assertion: Fluid exerts pressure on the walls of container.
Reason: Fluids have definite shape and size.
Which point have more pressure in the container?
Which of the following is an example of contact force?
Pascal is equal to:
Wooden block will
Pressure is directly proportional to
Statement-1: When one body moves or tries to move on the surface of another body, its speed continuously decreases.
Statement-2: Friction is a contact force.
Force per unit area is _______.
A fluid is a substance that
DIRECTIONS: Read the passage given below and answer the questions that follow. Passage Liquid pressure in a container doesn't depend on the shape of the container but it any depends on the height of the liquid column. The pressure due to a liquid at a point at a depth h from the surface of the liquid is given by P = ρgh where, ρ is the density of the liquid and g is the acceleration due to gravity. A cylindrical container is full of water. The pressure at the bottom is P. Now, the water is replaced by cooking oil of density twice the density of water. If the container is carried on a mountain then what will be the pressure at the bottom?
Answered - 0
Unanswered - 40
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