Physics-
General
Easy

Question

A point particle of mass m, moves along the uniformly rough track PQR as shown in the figure. The coefficient of friction, between the particle and the rough track equals mu The particle is released, from rest, from the point P and it comes to rest at a point R. The energies, lost by the ball, over the parts, PQ and QR, of the track, are equal to each other, and no energy is lost when particle changes direction from PQ to QR. The values of the coefficient of friction mu and the distance x(=QR), are, respectively close to:

  1. 0.2 and 3.5 m
  2. 0.29 and 3.5 m
  3. 0.29 and 6.5 m
  4. 0.2 and 6.5 m

The correct answer is: 0.29 and 3.5 m

Related Questions to study

General
physics-

An observer can see through a pin–hole the top end of a thin rod of height h, placed as shown in the figure. The beaker height is 3h and its radius h. When the beaker is filled with a liquid up to a height 2h, he can see the lower end of the rod. Then the refractive index of the liquid is

An observer can see through a pin–hole the top end of a thin rod of height h, placed as shown in the figure. The beaker height is 3h and its radius h. When the beaker is filled with a liquid up to a height 2h, he can see the lower end of the rod. Then the refractive index of the liquid is

physics-General
General
physics-

A diverging beam of light from a point source S having divergence angle a, falls symmetrically on a glass slab as shown. The angles of incidence of the two extreme rays are equal. If the thickness of the glass slab is t and the refractive index n, then the divergence angle of the emergent beam is

A diverging beam of light from a point source S having divergence angle a, falls symmetrically on a glass slab as shown. The angles of incidence of the two extreme rays are equal. If the thickness of the glass slab is t and the refractive index n, then the divergence angle of the emergent beam is

physics-General
General
physics-

A rectangular glass slab ABCD, of refractive index n1, is immersed in water of refractive index n subscript 2 end subscript open parentheses n subscript 1 end subscript greater than n subscript 2 end subscript close parentheses A ray of light in incident at the surface AB of the slab as shown. The maximum value of the angle of incidence amax, such that the ray comes out only from the other surface CD is given by

A rectangular glass slab ABCD, of refractive index n1, is immersed in water of refractive index n subscript 2 end subscript open parentheses n subscript 1 end subscript greater than n subscript 2 end subscript close parentheses A ray of light in incident at the surface AB of the slab as shown. The maximum value of the angle of incidence amax, such that the ray comes out only from the other surface CD is given by

physics-General
parallel
General
physics-

A smooth block is released at rest on a  incline and then slides a distance d. The time taken to slide is n times as much to slide on rough incline than on a smooth incline. The coefficient of friction is-

A smooth block is released at rest on a  incline and then slides a distance d. The time taken to slide is n times as much to slide on rough incline than on a smooth incline. The coefficient of friction is-

physics-General
General
physics-

A block is kept on a friction less inclined surface with angle of inclination . The incline is given an acceleration a to keep the block stationary. Then a is equal to-

A block is kept on a friction less inclined surface with angle of inclination . The incline is given an acceleration a to keep the block stationary. Then a is equal to-

physics-General
General
maths-

If the sides a, b, c of a triangle are in G.P. and largest angle exceeds the smallest by 6 0 to the power of 0 end exponent, then c o s blank B equals

If the sides a, b, c of a triangle are in G.P. and largest angle exceeds the smallest by 6 0 to the power of 0 end exponent, then c o s blank B equals

maths-General
parallel
General
physics-

Two plane mirrors. A and B are aligned parallel to each other, as shown in the figure. A light ray is incident at an angle of 30 degree at a point just inside one end of A. The plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is

Two plane mirrors. A and B are aligned parallel to each other, as shown in the figure. A light ray is incident at an angle of 30 degree at a point just inside one end of A. The plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is

physics-General
General
physics-

A point source of light B is placed at a distance L in front of the centre of a mirror of width d hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance 2L from it as shown. The greatest distance over which he can see the image of the light source in the mirror is

A point source of light B is placed at a distance L in front of the centre of a mirror of width d hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance 2L from it as shown. The greatest distance over which he can see the image of the light source in the mirror is

physics-General
General
physics-

Figure shows a glowing mercury tube. The illuminances at point A, B and C are related as

Figure shows a glowing mercury tube. The illuminances at point A, B and C are related as

physics-General
parallel
General
physics-

A block rests on a rough inclined plane making an angle  30 to the power of ring operatorof  with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is 10 N, the mass of the block (in kg) is : open parentheses text  taken  end text g equals 10 ms squared close parentheses

A block rests on a rough inclined plane making an angle  30 to the power of ring operatorof  with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is 10 N, the mass of the block (in kg) is : open parentheses text  taken  end text g equals 10 ms squared close parentheses

physics-General
General
Maths-

In capital delta A B C space i f space c o s squared A plus c o s squared B plus c o s squared C equals 1 comma then the triangle is.

In capital delta A B C space i f space c o s squared A plus c o s squared B plus c o s squared C equals 1 comma then the triangle is.

Maths-General
General
physics-

Two masses straight m subscript 1 equals 5 kg text  and  end text straight m subscript 2 equals 4.8 Kg tied to a string are hanging over a light friction less pulley. What is the acceleration of the masses when they are free to move ? (g=9.8ms squared)

Two masses straight m subscript 1 equals 5 kg text  and  end text straight m subscript 2 equals 4.8 Kg tied to a string are hanging over a light friction less pulley. What is the acceleration of the masses when they are free to move ? (g=9.8ms squared)

physics-General
parallel
General
physics-

A machine gun fires a bullet of mass 40 g with a velocity 1200 m s to the power of negative 1 end exponent . The man holding it, can exert maximum force of 144 N on the gun. How many bullets can he fire per second at the most?

A machine gun fires a bullet of mass 40 g with a velocity 1200 m s to the power of negative 1 end exponent . The man holding it, can exert maximum force of 144 N on the gun. How many bullets can he fire per second at the most?

physics-General
General
physics-

One end of massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 840 N. With what value of maximum safe acceleration (in m s to the power of negative 2 end exponent ) can a man of 60 kg climb on the rope

One end of massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 840 N. With what value of maximum safe acceleration (in m s to the power of negative 2 end exponent ) can a man of 60 kg climb on the rope

physics-General
General
physics-

Three identical blocks of masses m = 2 kg are drawn by a force F with an acceleration of 0.6 ms–2 on a frictionless surface, then what is the tension (in N) in the string between the blocks B and C

Three identical blocks of masses m = 2 kg are drawn by a force F with an acceleration of 0.6 ms–2 on a frictionless surface, then what is the tension (in N) in the string between the blocks B and C

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.