Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
Two blocks of masses in and 4 m lie on a smooth horizontal surface connected with a spring in its natural length. Mass m is given velocity v0 through an impulse as shown in Fig. Which of the following is not true about subsequent motion?
21
Sep
Two blocks of masses in and 4 m lie on a smooth horizontal surface connected with a spring in its natural length. Mass m is given velocity v0 through an impulse as shown in Fig. Which of the following is not true about subsequent motion? A strip of wood mass M and length l is [...]
A person rows a boat across a river making an angle of 60 with the downstream. Find the percentage time he would have saved, had he crossed the river in the shortest possible time.
21
Sep
A person rows a boat across a river making an angle of 60 with the downstream. Find the percentage time he would have saved, had he crossed the river in the shortest possible time. A person rows a boat across a river making an angle of 60 with the downstream. Find the percentage time he [...]
A man directly crosses a river in time t1 and swims down the current a distance equal to the width of the river in time t2. If u and v be the speed of the current and the man respectively, show that t1 : t2 :: root v +u : root v – u.
21
Sep
A man directly crosses a river in time t1 and swims down the current a distance equal to the width of the river in time t2. If u and v be the speed of the current and the man respectively, show that t1 : t2 :: root v +u : root v – u. A [...]
A boatman finds that he can save 6 s in crossing a river by the quickest path than by the shortest path. If the velocity of the boat and the river be, respectively, 17 m/s and 8 m/s, find the river width.
21
Sep
A boatman finds that he can save 6 s in crossing a river by the quickest path than by the shortest path. If the velocity of the boat and the river be, respectively, 17 m/s and 8 m/s, find the river width. 17 m/s and 8 m/s A boatman finds that he can save 6 [...]
A strip of wood mass M and length l is placed on a smooth horizontal surface. An insect of mass m starts from rest at one end of the strip and walks to the other end in time t, moving with a constant speed. The speed of the insect as seen from the ground is
21
Sep
A strip of wood mass M and length l is placed on a smooth horizontal surface. An insect of mass m starts from rest at one end of the strip and walks to the other end in time t, moving with a constant speed. The speed of the insect as seen from the ground is [...]
Two ships are 10 km apart on a line joining south to north. The one farther north is seaming west at 20 km/h. The other is steaming north at 20 km/h. What is their distance of closest approach?
21
Sep
Two ships are 10 km apart on a line joining south to north. The one farther north is seaming west at 20 km/h. The other is steaming north at 20 km/h. What is their distance of closest approach? Two ships are 10 km apart on a line joining south to north. The one farther north [...]
A block ‘A’ of mass m1 hits horizontally the rear side of a spring (ideal) attached to a block B of mass m^2 resting on a smooth horizontal surface. After hitting, ‘A’ gets attached to the spring. Some statements are given at any moment of time: i. If velocity of A is greater than B, then kinetic energy of the system will be decreasing. ii. If velocity of A is greater than B, then kinetic energy of the system will be increasing. iii. If velocity of A is greater than B, then momentum of the system will be decreasing. iv. If velocity of A is greater than B, then momentum of the system will be increasing. Now select correct alternative:
21
Sep
A block ‘A’ of mass m1 hits horizontally the rear side of a spring (ideal) attached to a block B of mass m^2 resting on a smooth horizontal surface. After hitting, ‘A’ gets attached to the spring. Some statements are given at any moment of time: i. If velocity of A is greater than B, [...]
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'A' gets attached to the spring. Some statements are given at any moment of time: i. If velocity of A is greater than B ,
A block 'A' of mass m1 hits horizontally the rear side of a spring (ideal) attached to a block B of mass m^2 resting on a smooth horizontal surface. After hitting ,
then kinetic energy of the system will be decreasing. ii. If velocity of A is greater than B ,
then kinetic energy of the system will be increasing. iii. If velocity of A is greater than B ,
then momentum of the system will be decreasing. iv. If velocity of A is greater than B ,
then momentum of the system will be increasing. Now select correct alternative: ,
Winds blows with a velocity x in the direction shown in Fig. 5.137. Two aeroplanes start out from point A and fly with a constant speed y. The first flies form A to B and the other along A to C. Both of them return back to A.
21
Sep
Winds blows with a velocity x in the direction shown in Fig. 5.137. Two aeroplanes start out from point A and fly with a constant speed y. The first flies form A to B and the other along A to C. Both of them return back to A. Find the time an aeroplane having velocity [...]
Figure shows a hollow cube of side ‘a’ and volume ‘V’. There is a small chamber of volume V/4 in the cube as shown. The chamber is completely filled by in kg of water. Water leaks through a hole H and spreads in the whole cube. Then the work done by gravity in this process assuming that the complete water finally lies at the bottom of the cube is
21
Sep
Figure shows a hollow cube of side ‘a’ and volume ‘V’. There is a small chamber of volume V/4 in the cube as shown. The chamber is completely filled by in kg of water. Water leaks through a hole H and spreads in the whole cube. Then the work done by gravity in this process [...]
An aeroplane flies along a straight path A to B and returns back again. The distance between A and B is l and the aeroplane maintains the constant speed v w.r.t. wind.
21
Sep
An aeroplane flies along a straight path A to B and returns back again. The distance between A and B is l and the aeroplane maintains the constant speed v w.r.t. wind. An aeroplane flies along a straight path A to B and returns back again. The distance between A and B is l and [...]