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Show that the frequency of nth harmonic mode in a vibrating string which is closed at both the end is ‘n’ times the frequency of the first harmonic

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Differentiate between the types of vibration in closed and open organ

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Define `u = v+ at` from velocity time

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A particle is moving along a straight line and its position is given by the relation `x=(t^3-6t^2+40)m` Find (a) The time at which velocity is zero. (b) Position and displacement of the particle at that point. (c) Acceleration for the particle at that

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A police jeep on a petrol duty on national highway was moving with a speed of 54km/hr. in the same direction. It finds a thief rushing up in a car at a rate of 126km/hr in the same direction. Police sub – inspector fired at the car of the thief with his service revolver with a muzzle speed of 100m/s. with what speed will the bullet hit the car of

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Establish the relation `Snth =u +a/2(2n-1)` where the letters have their usual

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A stone is dropped from the top of a cliff and is found to ravel 44.1m diving the lastsecond before it reaches the ground. What is the height of the cliff? `g =

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Establish `s=ut+1/2at^2` from velocity time graph for a uniform accelerated

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(a) Define the term relative velocity?(b) Write the expression for relative velocity of one moving with respect to another body when objects are moving in same direction and are moving in opposite directions?(c) A Jet airplane traveling at the speed of 500km/hr ejects its products of combustion at the speed of 1500km/h relative to the Jet plane. What is the speed of the latter with respect to an observer on the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Define (i) `v = u + at` (ii) `V^2 – u^2 = 2as` by calculus

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Derive expressions for velocity and acceleration for uniform circular motion.OR Derive expression for linear acceleration in uniform circular

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Derive an equation for the path of a projectile fired parallel to

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(a) Define time of flight and horizontal range?(b) From a certain height above the ground a stone A is dropped gently. Simultaneously another stone B is fired horizontally. Which of the two stones will arrive on the ground

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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What is a uniform circular motion? Explain the terms time period, frequency and angular velocity. Establish relation between

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A body of mass m is thrown with velocity `'υ'` at angle of `30^o` to the horizontal and another body B of the same mass is thrown with velocity υ at an angle of `60^o` to the horizontal. Find the ratio of the horizontal range and maximum height of A and

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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At what point of projectile motion (i) potential energy maximum (ii) Kinetic energymaximum (iii) total mechanical energy is

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A man weighs 70kg. He stands on a weighting machine in a lift, which is moving (a) Upwards with a uniform speed of 10m/s. (b) Downwards with a uniform acceleration of 5m/`s^2`. (c) Upwards with a uniform acceleration of 5m/`s^2`. Take g = 9.8m/`s^2`. What would be the readings on the scales in each case what would be the reading if the lift mechanism failed and it came down freely under

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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(a) State impulse – momentum theorem?(b) A ball of mass 0.1kg is thrown against a wall. It strikes the wall normally with a velocity of 30m/s and rebounds with a velocity of 20m/s. calculate the impulse of the force exerted by the ball on the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Ten one rupee coins are put on top of one another on a table. Each coin has a mass m kg. Give the magnitude and direction of (a) The force on the `7^(th)` coin (counted from the bottom) due to all coins above it. (b) The force on the `7^(th)` coin by the eighth coin and (c) The reaction of the sixth coin on the seventh

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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What is meant by coefficient of friction and angel of friction? Establish the relation between the two? ORA block of mass 10kg is sliding on a surface inclined at a angle of `30^o` with the horizontal. Calculate the acceleration of the block. The coefficient of kinetic friction between the block and the surface is

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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