Have a query? Ask a Tutor!!

Access to best educators and exclusive paper discussions

Can’t find what you’re looking for?

Our tutors are from top schools around the world, and they are waiting for you 24/7, anytime, anywhere.

Homework- One to One Solutions
Understand concepts to solve better
Get your doubts solved instantly

Physics-

General

Easy

Question

An intense stream of water of cross-sectional area $A$ strikes a wall at an angle $theta$ with the normal to the wall and returns back elastically. If the density of water is $rho$ and its velocity is $v$ ,then the force exerted in the wall will be

$2 A v ρ \cos θ$
$2 A v^{2} ρ \cos θ$
$2 A v^{2} ρ$
$2 A v ρ$

The correct answer is: $2 A v to the power of 2 end exponent rho cos invisible function application theta$

Linear momentum of water striking per second to the wall $P subscript 1 end subscript equals m v equals A v rho blank v equals A v to the power of 2 end exponent blank rho$ , similarly linear momentum of reflected water per second $P subscript r end subscript equals A v to the power of 2 end exponent rho$

Now making components of momentum along $x$ - axes and $y$ -axes. Change in momentum of water per second
$equals P subscript i end subscript cos invisible function application theta plus P subscript r end subscript cos invisible function application theta$
$equals 2 A v to the power of 2 end exponent blank rho cos invisible function application theta$
By definition of force, force exerted on the Wall $equals 2 A v to the power of 2 end exponent blank rho cos invisible function application theta$

Related Questions to study

The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with above spring of half length, the line $O A$ will

The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with above spring of half length, the line $O A$ will

physics-General

Two small particles of equal masses start moving in opposite directions from a point $A$ in a horizontal circular orbit. Their tangential velocities are $v$ and $2 v$ , respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at $A$ , these two particles will again reach the point $A$

Two small particles of equal masses start moving in opposite directions from a point $A$ in a horizontal circular orbit. Their tangential velocities are $v$ and $2 v$ , respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at $A$ , these two particles will again reach the point $A$

physics-General

In a model, it is shown that an arch of abridge is semi-elliptical with major axis horizontal. If the length of the base is 9 m and the highest part of the bridge is 3 m from the horizontal, the best approximation of the height of the arch, 2 m from the centre of the base is

In a model, it is shown that an arch of abridge is semi-elliptical with major axis horizontal. If the length of the base is 9 m and the highest part of the bridge is 3 m from the horizontal, the best approximation of the height of the arch, 2 m from the centre of the base is

parallel

The number of non-negative integral solutions of x + y + z  n, where n  N is -

The number of non-negative integral solutions of x + y + z  n, where n  N is -

Between two junction stations A and B there are 12 intermediate stations. The number of ways in which a train can be made to stop at 4 of these stations so that no two of these halting stations are consecutive is -

Between two junction stations A and B there are 12 intermediate stations. The number of ways in which a train can be made to stop at 4 of these stations so that no two of these halting stations are consecutive is -

If n objects are arranged in a row, then the number of ways of selecting three of these objects so that no two of them are next to each other is -

If n objects are arranged in a row, then the number of ways of selecting three of these objects so that no two of them are next to each other is -

parallel

The number of numbers between 1 and 10¹⁰ which contain the digit 1 is -

The number of numbers between 1 and 10¹⁰ which contain the digit 1 is -

The number of rectangles in the adjoining figure is –

The number of rectangles in the adjoining figure is –

Assertion :this equilibrium favours backward direction.
Reason :is stronger base than $C H subscript 2 end subscript C O O to the power of minus end exponent$

Assertion :this equilibrium favours backward direction.
Reason :is stronger base than $C H subscript 2 end subscript C O O to the power of minus end exponent$

chemistry-General

parallel

A 0.098 kg block slides down a frictionless track as shown. The vertical component of the velocity of block at $A$ is

A 0.098 kg block slides down a frictionless track as shown. The vertical component of the velocity of block at $A$ is

Physics-General

Two small particles of equal masses start moving in opposite directions from a point A in a horizontal circular orbit. Their tangential velocities are $v blank a n d blank 2 v$ respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at $A blank$ ,these two particles will again reach The point $A ?$

Two small particles of equal masses start moving in opposite directions from a point A in a horizontal circular orbit. Their tangential velocities are $v blank a n d blank 2 v$ respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at $A blank$ ,these two particles will again reach The point $A ?$

physics-General

The trajectory of a particle moving in vast maidan is as shown in the figure. The coordinates of a position $A$ are $open parentheses 0 , 2 close parentheses.$ The coordinates of another point at which the instantaneous velocity is same as the average velocity between the points are

The trajectory of a particle moving in vast maidan is as shown in the figure. The coordinates of a position $A$ are $open parentheses 0 , 2 close parentheses.$ The coordinates of another point at which the instantaneous velocity is same as the average velocity between the points are

physics-General

parallel

The potential energy of a particle varies with distance $x$ as shown in the graph.
The force acting on the particle is zero at

The potential energy of a particle varies with distance $x$ as shown in the graph.
The force acting on the particle is zero at

physics-General

A $10 k g$ mass moves along $x$ -axis. Its acceleration as a function of its position is shown in the figure. What is the total work done on the mass by the force as the mass moves from $x equals 0$ to $x equals 8 blank c m$

A $10 k g$ mass moves along $x$ -axis. Its acceleration as a function of its position is shown in the figure. What is the total work done on the mass by the force as the mass moves from $x equals 0$ to $x equals 8 blank c m$

physics-General

A mass $m$ slips along the wall of a semispherical surface of radius $R$ . The velocity at the bottom of the surface is

A mass $m$ slips along the wall of a semispherical surface of radius $R$ . The velocity at the bottom of the surface is

physics-General

parallel

card img

With Turito Academy.

card img

With Turito Foundation.

card img

Get an Expert Advice From Turito.

Turito Academy

card img

With Turito Academy.

Test Prep

card img

With Turito Foundation.