Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 25

**physics**

The length of a sonometer wire AB is 100cm where should the two bridges be placed from A to divide the wire in 3 segments whose fundamental frequencies are in the ratio of 1:2:6 options: 1.60cm,90cm 2.40cm,80cm

**physics**

the angular frequency of a particle in a progressive wave in an elastic medium is 100.(3.14) rads^-1.and it is moving with a velocity of 200 ms^-1. the phase difference between two particles separated by a distance of 20cm is options: 1.31.4 rad 2.36 rad

**physics**

the equation of a transverse wave travel ling on a rope is given by y=10sin3.14(0.01x-2.00t)where y and x are in cm and t is in seconds.the maximum transverse speed of the particle in the rope is about options: 1. 62.8 cm/s 2. 75 cm/s

**physics**

12. A particle starts moving from rest with uniform acceleration. it travels a distance x in first 2 sec and a distance y in the next 2 sec .Then options: 1.y=x 2.y=3x

**physics**

a car moving with a speed of 50 km/hr can be spotted by breaks after at least 6m.If the same car is moving with a speed of 100km/hr the minimum stopping distance is? options: 1. 24m 2. 6m

**physics**

a car moving with constant acceleration covers a distance between two points 180m apart in 6 sec.its speed as it passes the second point in 45m/s. what is its acceleration and its speed at the first point? options: 1. -5 m/s^2;15m/s 2. 5 m/s^2;15m/s

**physics**

A particle moving with a constant acceleration describes in the last second of it's motion 9/25th of the whole distance.of it starts from rest ,how long is the particle is in motion and through what distance does it move if it describes 6cm in first second? options 1. 5s,1...

**physics**

a bullet fired into a fixed target loses half of its velocity in penetrating 15cm.how much further will it penetrate before coming to rest? options: 1.5cm 2.15cm

**physics**

a train moving at constant velocity of 54 k mph moves east wards for 30 min, then due to north with the same speed for 40 min. What is the average velocity of the train during the run?(in k mph)

**physics**

a boy walks to his school at a distance of 6km with constant speed of 2.5 k mph and walks back with a constant sped of 4 k mph. His average speed of round trip expressed in k mph is?

**physics**

if a car covers 2/5th of the total distance with v1 speed and 3/5th distance with v2 then average speed is?

**physics**

a boy walks to his school at a distance of 6km with constant speed of 2.5 k mph and walks back with a constant sped of 4 k mph. His average speed of round trip expressed in k mph is?

**physics**

A particle moving with a constant acceleration describes in the last second of it's motion 9/25th of the whole distance.of it starts from rest ,how long is the particle is in motion and through what distance does it move if it describes 6cm in first second?

**physics**

a train moving at constant velocity of 54 k mph moves east wards for 30 min, then due to north with the same speed for 40 min. What is the average velocity of the train during the run?(in k mph)

**physics**

a ball dropped on to a floor .if the coefficient of restitution is 0.5.the percentage loss of energy of the ball on rebounding from the floor is?

**physics**

a neutron of mass 1.67*1o power of (-27) is moving with a velocity 10 to the power of(6) collides with a deuteron of mass 3.34*10 to the power of (-27) kg at rest .after collision if both have single particle find its velocity

**physics**

a ball bounces directly upon another ball at rest and it self brought to rest by the impact.if half of initial kinetic energy is destroyed in the collision ,the co-efficient of restitution is?

**physics**

a man of 50kg is standing on one end on a boat of length 25m and mass 200 kg .if he starts running and when he reaches the other end ,he has a velocity 2m/s with respect to the boat .the final velocity of the boat is?

**physics**

yes the bob goes straight up and stops

**physics**

a pendulum consists of a wooden bob of mass m and length l. A Bullet of mass m1 is fired towards the pendulum with a speed v1.the bullet emerges out of the bob with a speed v1/3 and the bob just completes motion along a vertical line ,then v1 is?

**physics**

a simple pendulum of length 0.2m has bob of mass 5gm, it is pulled aside through an angle 60 degrees from the vertical. a spherical body of mass 2.5gm is placed at the lowest position of the bob. when the bob is released it strikes the spherical body and comes to rest.what is ...

**physics**

two perfect elastic balls of same mass m are moving with velocities u1 and u2 . they collide elastically n times. the kinetic energy of the system finally is?

**physics**

a ball falls vertically onto a floor , with momentum p,and then bounces repeatedly.the co-efficient of restitution is e.the total momentum imparted by the ball is

**physics**

a ball of mass m , moving with uniform speed, collides elastically with another stationary ball.the incident ball will lose maximum kinetic energy when the mass of the stationary ball is?

**physics**

a ball striking a horizontal plane with a velocity v rebounds with a velocity 256v/625 after 4th collision. the coefficient of restitution is?

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