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Class 11th

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3 months ago

Class 11th Physics Mechanical Properties of Fluids

The velocity of liquid coming out of a small hole of a large vessel containing two different liquids shown in figure is

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Vishal Baghel

Contributor-Level 10

Applying Bernoulli's theorem

$\Rightarrow P_{0} + ρ g 2 h + 2 ρ g h + 0 = P_{0} + \frac{1}{2} 2 ρ v^{2}$

$\Rightarrow V^{2} = 4 g h$

$\Rightarrow v = 2 \sqrt[]{g h}$

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3 months ago

Class 11th Physics

A man is sitting in a boat which is floating in a pond. If the man drink some water from the pond, what will happen to the level of water in the pond?

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alok kumar singh

Contributor-Level 10

Since the water removed from the pond will be equal to the water displacement by the (man + boat) system, the level of water in the pond remains the same.

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3 months ago

Class 11th Physics Motion in Straight Line

The velocity-time graph of a body moving in a straight line is shown in the figure. Find the distance travelled by the body in 6 seconds.

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alok kumar singh

Contributor-Level 10

Distance travelled by the body = Sum of areas under the curve (both below and above x-axis)

$\frac{1}{2} * 3 * 10 * 2$

$= 30 m$

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3 months ago

Class 11th Work, Energy and Power

The kinetic energy of a body decreases by 36%. The decrease in linear momentum is

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alok kumar singh

Contributor-Level 10

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3 months ago

Class 11th Work, Energy and Power

A particle of mass m is dropped from rest from a height h0 on a horizontal floor. The coefficient of restitution between the floor and particle is e. Maximum height attained by the particle after second collision is

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alok kumar singh

Contributor-Level 10

Height attained after first collision (h1) = e²h0

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3 months ago

Class 11th Physics System of Particles and Rotational Motion

. An automobile engine develops 10⁵ W power when rotating at an angular speed of 900 rad/minute. The instantaneous torque delivered by the engine is

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alok kumar singh

Contributor-Level 10

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3 months ago

Class 11th Physics

Gravitational force between two point masses is found to be F when both are in vacuum. If both the masses are immersed in water, new gravitational force will be:

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alok kumar singh

Contributor-Level 10

Gravitational force does not depend on the surrounding medium.

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3 months ago

Class 11th Laws of Motion

A ball is projected from ground with initial momentum p at an angle θ . What is the magnitude of net change in linear momentum when it reaches at maximum height of journey?

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