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A body is released from a point distance r from the centre of earth. If R is the radius of the earth and r>R, then the velocity of the body at the time of striking the earth will be
22
Sep
A body is released from a point distance r from the centre of earth. If R is the radius of the earth and r>R, then the velocity of the body at the time of striking the earth will be A body is released from a point distance r from the centre of earth. If R [...]
A particle of mass ‘m’ is kept at rest at a height 3 R from the surface of earth, where ‘R’ is radius of earth and ‘M’ is mass of earth. The minimum speed with which it should be projected, so that it does not return back, is (g is acceleration due to gravity on the surface of earth)
22
Sep
A particle of mass ‘m’ is kept at rest at a height 3 R from the surface of earth, where ‘R’ is radius of earth and ‘M’ is mass of earth. The minimum speed with which it should be projected, so that it does not return back, is (g is acceleration due to gravity on [...]
The radius in kilometers, to which the present radius of the earth (R =6400 km) is to be compressed so that the escape velocity is increased ten times is
22
Sep
The radius in kilometers, to which the present radius of the earth (R =6400 km) is to be compressed so that the escape velocity is increased ten times is The radius in kilometers to which the present radius of the earth (R =6400 km) is to be compressed so that the escape velocity is increased [...]
Two balls A and B are thrown vertically upwards from the same location on the surface of the earth with velocities 2gR/3‾‾‾‾‾√ and 2gR/3‾‾‾‾‾‾√ respectively, where R is the radius of the earth and g is the acceleration due to gravity on the surface of the earth. The ratio of the maximum height attained by A to that attained by B is
22
Sep
Two balls A and B are thrown vertically upwards from the same location on the surface of the earth with velocities 2gR/3‾‾‾‾‾√ and 2gR/3‾‾‾‾‾‾√ respectively, where R is the radius of the earth and g is the acceleration due to gravity on the surface of the earth. The ratio of the maximum height attained by [...]
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Two balls A and B are thrown vertically upwards from the same location on the surface of the earth with velocities 2gR/3‾‾‾‾‾√ and 2gR/3‾‾‾‾‾‾√ respectively ,
where R is the radius of the earth and g is the acceleration due to gravity on the surface of the earth. The ratio of the maximum height attained by A to that attained by B is ,
A particle of mass 1 kg is attached to a string of length 5 m. The string is attached to a fixed point O. It is released from the position as shown in figure. Calculate a. the impulse developed in the string when it becorries taut, b. the velocity of the particle just after the string becomes taut, c. the impulse developed in this string PQ at this instant.
22
Sep
A particle of mass 1 kg is attached to a string of length 5 m. The string is attached to a fixed point O. It is released from the position as shown in figure. Calculate a. the impulse developed in the string when it becorries taut, b. the velocity of the particle just after the [...]
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find the velocities of the particles m1 and m2 just after the string is taut. ,
the particle m1 moves with velocity v0 when the string is not taut. Neglecting fricting in all contacting surface ,
Two particles of masses m1 and m2 are connected by a light and inextensible string which passes over a fixed pulley. Initially ,
What is the escape velocity for a body on the surface of a planet on which the acceleration due to gravity is (3.1)^2 ms^−2 and whose radius is 8100 km?
22
Sep
What is the escape velocity for a body on the surface of a planet on which the acceleration due to gravity is (3.1)^2 ms^−2 and whose radius is 8100 km? What is the escape velocity for a body on the surface of a planet on which the acceleration due to gravity is (3.1)^2 ms^−2 and [...]
A plate of mass M is held at rest by firing bullets from below. Each bullet has a mass m, velocity u (up) just before hitting and stops after hitting the plate for a moment and falls. Determine the number of bullets striking the plate Fig. per unit time
22
Sep
A plate of mass M is held at rest by firing bullets from below. Each bullet has a mass m, velocity u (up) just before hitting and stops after hitting the plate for a moment and falls. Determine the number of bullets striking the plate Fig. per unit time A plate of mass M is [...]
A machine gun can fire bullets of 50 grams at a Speed of 2000 m/s, the man holding the gun can exert an average force of 200N against the gun. Calculate the maximum number of bullets which he can fire per minute.
22
Sep
A machine gun can fire bullets of 50 grams at a Speed of 2000 m/s, the man holding the gun can exert an average force of 200N against the gun. Calculate the maximum number of bullets which he can fire per minute. A machine gun can fire bullets of 50 grams at a Speed of [...]
A 3 kg steel ball strikes a wall with a speed of 10.0 m/s at an angle of 60.0 ∘ with the surfaces of the wall. The ball bounces off with the same speed and same angle. If the ball was in contact with the wall for 0.2 s, find the average force exerted by the wall on the ball.
22
Sep
A 3 kg steel ball strikes a wall with a speed of 10.0 m/s at an angle of 60.0 ∘ with the surfaces of the wall. The ball bounces off with the same speed and same angle. If the ball was in contact with the wall for 0.2 s, find the average force exerted by [...]
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find the velocities of the particles m1 and m2 just after the string is taut. ,
the particle m1 moves with velocity v0 when the string is not taut. Neglecting fricting in all contacting surface ,
Two particles of masses m1 and m2 are connected by a light and inextensible string which passes over a fixed pulley. Initially ,
The escape velocity of an object from the earth depends upon the mass of the earth ( M ), its mean density (ρ), its radius ( R ) and the gravitational constant ( G ). Thus the formula for escape velocity is
22
Sep
The escape velocity of an object from the earth depends upon the mass of the earth ( M ), its mean density (ρ), its radius ( R ) and the gravitational constant ( G ). Thus the formula for escape velocity is its mean density (ρ) its radius ( R ) and the gravitational constant [...]