Posts

A heavy iron bar , of weight W is having its one end on the ground and the other on the shoulder of a person , the bar makes an angle 𝜽 with the horizontal . The weight experienced by the person is : 2024 w/2 W W cos𝜽 W sin𝜽

Education is a part of Life
Post a Comment
WE COME TO NXT WEB

2 kg and 3 kg blocks are placed on a smooth horizontal surface and connected by a spring which is unstretched initially. The blocks are imparted velocities as shown in the figure. 3. Maximum speed of 2kg block in the subsequent motion will be a. 𝑣_0 b. 2𝑣_0 c. 3𝑣_0 d. 4𝑣_0

Education is a part of Life
Post a Comment
WE COME TO NXT WEB

2 kg and 3 kg blocks are placed on a smooth horizontal surface and connected by a spring which is unstretched initially. The blocks are imparted velocities as shown in the figure. 2. Maximum speed of 3kg block in the subsequent motion will be a. 𝑣_0 b. 2𝑣_0 c. 3𝑣_0 d. 4𝑣_0

Education is a part of Life
Post a Comment
WE COME TO NXT WEB

2 kg and 3 kg blocks are placed on a smooth horizontal surface and connected by a spring which is unstretched initially. The blocks are imparted velocities as shown in the figure. The maximum energy in the spring in the subsequent motion will be . a. 5𝑣_0^2 b. 15𝑣_0^2 c. zero d. 10𝑣_0^2

Education is a part of Life
Post a Comment
WE COME TO NXT WEB

A ball moving with a velocity v hits a massive wall moving towards the ball with a velocity u. An elastic impact lasts for time Δt. 1. The average elastic force acting on the ball is "m(u+v)" /"Δt." 2. The average elastic force acting on the ball is" 2m(u+v)" /"Δt." 3. The kinetic energy of the ball increases by 2mu(u+v). 4. The kinetic energy of the ball remains the same after the collision.

Education is a part of Life
Post a Comment
WE COME TO NXT WEB

A particle moving with kinetic energy 3 J makes an elastic head-on collision with a stationary particle which has twice its mass. During the impact,  (a) the minimum kinetic energy of the system is 1 J  (b) the maximum elastic potential energy of the system is 2 J  (c) momentum and total energy are conserved at every instant  (d) the ratio of kinetic energy to potential energy of the system first decreases and then increases

Education is a part of Life
Post a Comment
WE COME TO NXT WEB

A blast breaks a body initially at rest of mass 0.5kg into three pieces , two smaller pieces of equal mass and the third double the mass of either of small piece . After the blast two smaller masses move at right angles to one another with equal speed . Find the statements that is/are true for this case assuming that the energy of blast is totally transferred to masses. All the three pieces share the energy of blast equally The speed of bigger mass is √2 times the speed of either of the smaller mass The direction of motion of bigger makes an angle of 135° with the direction of smaller pieces The bigger pieces carries double the energy of either pieces

Education is a part of Life
Post a Comment
WE COME TO NXT WEB

Two charges moving under their only own mutual attraction separated by large distance initially. Then choose the correct statement(s) 1. If both are free, mechanical energy is conserved. 2. If one is fixed and other is free, mechanical energy is conserved. 3. If one is fixed and other is free, momentum is conserved. 4. If both are free momentum is conserved.

Education is a part of Life
Post a Comment
WE COME TO NXT WEB

X and Y component of acceleration of centre of mass are : 𝑎_(𝑐𝑜𝑚 𝑥)=(𝑚_1 𝑚_2 𝑔)/(𝑚_(1+) 𝑚_2 ) 𝑎_(𝑐𝑜𝑚 𝑥)=(𝑚_1 𝑚_2 𝑔)/〖𝑚_(1+) 𝑚_2〗^2 𝑎_(𝑐𝑜𝑚 𝑦)= 〖(𝑚_2/(𝑚_(1+) 𝑚_2 ))〗^2g 𝑎_(𝑐𝑜𝑚 𝑦)=(𝑚_2 𝑔)/〖𝑚_(1+) 𝑚_2〗^2

Education is a part of Life
Post a Comment
WE COME TO NXT WEB