Question Answers
Sahay Sir > Question Answers
A balloon is going vertically upwards with a velocity of 10 m/s. When it is 75 m above the ground, a stone is gently released from it. The time taken by the stone to reach the ground is (g = 10 m/s^2)
06
Sep
A balloon is going vertically upwards with a velocity of 10 m/s. When it is 75 m above the ground, a stone is gently released from it. The time taken by the stone to reach the ground is (g = 10 m/s^2) A balloon is going vertically upwards with a velocity of 10 m/s. When [...]
A long wire PQR is made by joining two wires PQ and QR of equal radii. PQ has length 4.8 m and mass 0.06 kg. QR has length 2.56 m and mass 0.2 kg. The wire PQR is under tension of 80 N. A sinusoidal
06
Sep
A long wire PQR is made by joining two wires PQ and QR of equal radii. PQ has length 4.8 m and mass 0.06 kg. QR has length 2.56 m and mass 0.2 kg. The wire PQR is under tension of 80 N. A sinusoidal A long wire PQR is made by joining two wires [...]
Two balls A and B of same masses are thrown from the top of the building A. Thrown upward with velocity V and B, thrown downward with velocity V, then
06
Sep
Two balls A and B of same masses are thrown from the top of the building A. Thrown upward with velocity V and B, thrown downward with velocity V, then then thrown downward with velocity V Two balls A and B of same masses are thrown from the top of the building A. Thrown upward [...]
A healthy young man standing at a distance of 7 m from a 10 m high building see a kid slipping from the top floor. With what speed (assumed uniform) should he run to catch the kid at the arms height (1.8 m) ?
06
Sep
A healthy young man standing at a distance of 7 m from a 10 m high building see a kid slipping from the top floor. With what speed (assumed uniform) should he run to catch the kid at the arms height (1.8 m) ? A particle is thrown vertically upward from the ground with some [...]
A progressive wave travels in a medium M1 and enters into another medium M2 in which its speed decreases to 75%. What is the ratio of the amplitude of the (a) Reflected and the incident waves, and (b) Transmitted and the incident waves?
06
Sep
A progressive wave travels in a medium M1 and enters into another medium M2 in which its speed decreases to 75%. What is the ratio of the amplitude of the (a) Reflected and the incident waves, and (b) Transmitted and the incident waves? A progressive wave travels in a medium M1 and enters into another [...]
A ball falls from height h. After 1 second, another ball falls freely from a point 25 m below the point from where the first ball falls. Both of them reach the ground at the same time. What is the value of h?
06
Sep
A ball falls from height h. After 1 second, another ball falls freely from a point 25 m below the point from where the first ball falls. Both of them reach the ground at the same time. What is the value of h? A ball falls from height h. After 1 second another ball falls [...]
A ball is dropped from the top of an 80 m high tower After 2 s another ball is thrown downwards from the tower. Both the balls reach the ground simultaneously. The initial speed of the second ball is.
06
Sep
A ball is dropped from the top of an 80 m high tower After 2 s another ball is thrown downwards from the tower. Both the balls reach the ground simultaneously. The initial speed of the second ball is. A ball is dropped from the top of an 80 m high tower After 2 s [...]
A progressive wave gets reflected at a boundary such that the ratio of amplitudes of the reflected and incident wave is 1:2. Find the percentage of energy transmitted.
06
Sep
A progressive wave gets reflected at a boundary such that the ratio of amplitudes of the reflected and incident wave is 1:2. Find the percentage of energy transmitted. A progressive wave gets reflected at a boundary such that the ratio of amplitudes of the reflected and incident wave is 1:2. Find the percentage of energy [...]
Consider the following wave functions: (a) Y = A sin (omega t – kx), (b) y = A sin (kx – omega t) (c) Y = A cos (omega t – kx)
06
Sep
Consider the following wave functions: (a) Y = A sin (omega t – kx), (b) y = A sin (kx – omega t) (c) Y = A cos (omega t – kx) (b) y = A sin (kx - omega t) (c) Y = A cos (omega t - kx) Consider the following wave functions: [...]
Consider a string fixed at one end. A travelling wave given by the wave equation Y = A sin (omega t – kx) is incident on it. Show that at the fixed end of a string the wave suffers a phase change of pie, i.e., as it travels back as if
06
Sep
Consider a string fixed at one end. A travelling wave given by the wave equation Y = A sin (omega t – kx) is incident on it. Show that at the fixed end of a string the wave suffers a phase change of pie, i.e., as it travels back as if Consider a string fixed [...]