a 50g bullet moving with velocity of 10m/s gets embedded into a 950g stationary body.The loss in kinetic energy of system will be(A)95%(B)100%(C)5%(D)50%

a disc rotating about its axis from rest , aquires the angular speed 100rev/s in 4 sec. the angle rotated by it during these 4 sec.( in radian) is

ans: 400

plz xplain how?

The ratio of radius of gyration of a circular disc about a tangential axis in the plane of the disc and a circular ring of the same radius about a tangential axis in the plane of the ring is

A simple pendulum with bob of mass m and conducting wire of length L swings(is hanging ) under gravity thro' an angle 2theetha.

The earth's magnetic feild component in the direction perpendicular to swing is B.

the max potential diff induced across pendulum is?

two rods of equal length(l) and equal mass M are kept along x and y axis respectively such that their centre of mass lie at origin.the moment of inertia about an line y=x,is

"A bullet of mass 0.01 kg and travelling at a speed of 500m/s strikes a block which is suspended by a string of length 5m. The centre of gravity of the block is found to rise a distance of 0.1m. What is the speed of bullet after it emerges from the block?"

if a magnet is suspended at an angle 30 degree to the magnetic meridian the dip needle makes angle of 45 degree with the horizontal. the real dip is ??

a 50g bullet moving with velocity of 10m/s gets embedded into a 950g stationary body.The loss in kinetic energy of system will be

(A)95%

(B)100%

(C)5%

(D)50%

a disc rotating about its axis from rest , aquires the angular speed 100rev/s in 4 sec. the angle rotated by it during these 4 sec.( in radian) is

ans: 400

plz xplain how?

2. Two particles of masses 2 kg and 4 kg are thrown from the top of a tower such that first is vertically upward and second is at angle 45

^{o}above horizontal. Acceleration of the centre of mass of two particle system is.$\left(1\right)g\left(2\right)\frac{g}{6}\left(3\right)\frac{2g}{3}\left(4\right)\frac{g}{3}$

Solve this :$8.\mathrm{If}\mathrm{current}{\mathrm{I}}_{3}=3\mathrm{A}\mathrm{sin}\mathrm{\omega t}\mathrm{and}{\mathrm{I}}_{2}=4\mathrm{A}\mathrm{cos}\mathrm{\omega t},\mathrm{then}{\mathrm{I}}_{3}\mathrm{is}:\phantom{\rule{0ex}{0ex}}\left(1\right)5\mathrm{A}\mathrm{sin}\left(\mathrm{\omega t}+53\xb0\right)\left(2\right)5\mathrm{A}\mathrm{sin}\left(\mathrm{\omega t}+37\xb0\right)\phantom{\rule{0ex}{0ex}}\left(3\right)5\mathrm{A}\mathrm{sin}\left(\mathrm{\omega t}+45\xb0\right)\left(4\right)5\mathrm{A}\mathrm{sin}\left(\mathrm{\omega t}+30\xb0\right)$

(Answer 2L)

Ris rotated with an angular velocity ω perpendicular to the plane of a magnetic fieldBas shown in the figure. Emf induced in the loop is(1)

BωR^{2}(2) $\frac{1}{2}B\omega {R}^{2}$ (3) $\frac{3}{2}B\omega {R}^{2}$ (4) $\frac{1}{4}B\omega {R}^{2}$The ratio of radius of gyration of a circular disc about a tangential axis in the plane of the disc and a circular ring of the same radius about a tangential axis in the plane of the ring is

A simple pendulum with bob of mass m and conducting wire of length L swings(is hanging ) under gravity thro' an angle 2theetha.

The earth's magnetic feild component in the direction perpendicular to swing is B.

the max potential diff induced across pendulum is?

(1) ACW, In horizontal plane

(2) ACW, In vertical plane

(3) CW, In horizontal plane

(4) CW, In vertical plane

two rods of equal length(l) and equal mass M are kept along x and y axis respectively such that their centre of mass lie at origin.the moment of inertia about an line y=x,is

"A bullet of mass 0.01 kg and travelling at a speed of 500m/s strikes a block which is suspended by a string of length 5m. The centre of gravity of the block is found to rise a distance of 0.1m. What is the speed of bullet after it emerges from the block?"

if a magnet is suspended at an angle 30 degree to the magnetic meridian the dip needle makes angle of 45 degree with the horizontal. the real dip is ??