Physics-
General
Easy
Question
A sphere of mass m is kept between two inclined walls, as shown in the figure. If the coefficient of friction between each wall and the sphere is zero, then the ratio of normal reaction 
offered by the walls 1 and 2 on the sphere will be
- tan
- tan2
- 2cos
- cos2
The correct answer is: 2cos
.
Related Questions to study
physics-
Two wedges, each of mass m, are placed next to each other on a flat floor. A cube of mass M is balanced on the wedges as shown. Assume no friction between 
the cube and the wedges, but a coefficient of static friction < 1 between the wedges and the floor. What is the largest M that can be balanced as shown without motion of the wedges?
Two wedges, each of mass m, are placed next to each other on a flat floor. A cube of mass M is balanced on the wedges as shown. Assume no friction between the cube and the wedges, but a coefficient of static friction < 1 between the wedges and the floor. What is the largest M that can be balanced as shown without motion of the wedges?
physics-General
physics-
In the Figure, AB and BK represent incident and reflected rays. If angle BCF = 35º. Then ÐBFP. will be equal to ____ degrees.
In the Figure, AB and BK represent incident and reflected rays. If angle BCF = 35º. Then ÐBFP. will be equal to ____ degrees.
physics-General
physics-
An arrangement of the masses and pulleys is shown in the figure. Strings connecting masses A and B with pulleys are horizontal and all pulleys and strings are light. Friction coefficient between the surface and the block B is 0.2 and between blocks A and B is 0.7. The system is released from rest (use g = 10 
).
An arrangement of the masses and pulleys is shown in the figure. Strings connecting masses A and B with pulleys are horizontal and all pulleys and strings are light. Friction coefficient between the surface and the block B is 0.2 and between blocks A and B is 0.7. The system is released from rest (use g = 10 ).
physics-General
physics-
The graph between 
where
is wavelength of incident light and stopping potential (V) of three metals having work functions 
and 
in an experiment of photo-electric effect is plotted as shown in the figure. Which of the following statements is correct?
The graph between where is wavelength of incident light and stopping potential (V) of three metals having work functions and in an experiment of photo-electric effect is plotted as shown in the figure. Which of the following statements is correct?
physics-General
physics-
A particle is projected with a speed V from a point O making an angle of 30° with the vertical. At the same instant, a second particle is thrown vertically upward from a point A with speed v. The two particle reach H, the highest point on the parabolic path of the first particle simultaneously, then the ratio
A particle is projected with a speed V from a point O making an angle of 30° with the vertical. At the same instant, a second particle is thrown vertically upward from a point A with speed v. The two particle reach H, the highest point on the parabolic path of the first particle simultaneously, then the ratio
physics-General
physics-
A girl is riding on a flat car travelling with a constant velocity 10 ms-1 as shown in the fig. She wishes to throw a ball through a stationary hoop in such a manner that the ball will move horizontally as it passes through the hoop. She throws the ball with an initial speed 
with respect to car. The horizontal distance in front of the hoop at which ball has to be thrown is
A girl is riding on a flat car travelling with a constant velocity 10 ms-1 as shown in the fig. She wishes to throw a ball through a stationary hoop in such a manner that the ball will move horizontally as it passes through the hoop. She throws the ball with an initial speed with respect to car. The horizontal distance in front of the hoop at which ball has to be thrown is
physics-General
physics-
Two particles instantaneously at A & B respectively 4.5 meters apart are moving with uniform velocities as shown in the figure. The former towards B at 1.5 m/sec and the latter perpendicular to AB at 1.125 m/sec. The instant when they are nearest is:
Two particles instantaneously at A & B respectively 4.5 meters apart are moving with uniform velocities as shown in the figure. The former towards B at 1.5 m/sec and the latter perpendicular to AB at 1.125 m/sec. The instant when they are nearest is:
physics-General
physics-
A stone is projected from a horizontal plane. It attains maximum height 'H' & strikes a stationary smooth wall & falls on the ground vertically below the maximum height. Assume the collision to be elastic the height of the point on the wall where ball will strike is:
A stone is projected from a horizontal plane. It attains maximum height 'H' & strikes a stationary smooth wall & falls on the ground vertically below the maximum height. Assume the collision to be elastic the height of the point on the wall where ball will strike is:
physics-General
physics-
Which of the following curves may represent the speed of electron in a hydrogen atom as a function of principal quantum number n?
Which of the following curves may represent the speed of electron in a hydrogen atom as a function of principal quantum number n?
physics-General
physics-
The diagram shows the energy levels for an electron in certain hydrogen like atom. Which transition shown represents the emission of a photon with the most energy?
The diagram shows the energy levels for an electron in certain hydrogen like atom. Which transition shown represents the emission of a photon with the most energy?
physics-General
physics-
If 
and 
are the wavelength of 
X-rays emitted by 
and 
tin isotopes, then
If and are the wavelength of X-rays emitted by and tin isotopes, then
physics-General
physics-
STATEMENT – 1 Waves generated in a metal piece can be transverse and longitudinal path. because
STATEMENT – 2 Waves generated depend upon the method of creating waves in the metal.
STATEMENT – 1 Waves generated in a metal piece can be transverse and longitudinal path. because
STATEMENT – 2 Waves generated depend upon the method of creating waves in the metal.
physics-General
physics-
Which one of the following equations represents transverse progressive waves
Z1 = A cos (ωt – kx);
Z2 = A cos (ωt + kx)
Z3 = A cos (ωt + kx);
Z4 = A cos (2ωt + 2kx)
Which one of the following equations represents transverse progressive waves
Z1 = A cos (ωt – kx);
Z2 = A cos (ωt + kx)
Z3 = A cos (ωt + kx);
Z4 = A cos (2ωt + 2kx)
physics-General
physics-
If two waves of the from y = a sin (ωt – kx) and y = a cos (kx - ωt) are superposed, the resultant wave will have amplitude
If two waves of the from y = a sin (ωt – kx) and y = a cos (kx - ωt) are superposed, the resultant wave will have amplitude
physics-General
Maths-
Find the compound interest on Rs 5000 at 6% per annum for 3 years compounded annually
Find the compound interest on Rs 5000 at 6% per annum for 3 years compounded annually
Maths-General
