Physics question and answers for May 09, 2024
- Q Time speed of revolution of a nearest satellite around a planet of radius R is T Period of revolution around another planet whose radius is 3 R but having same...
- Q A body of mass m kg starts falling from a point 2R above the earth surface Its kinetic energy when it has fallen to a point upto height R above...
- Q As shown in the figure a uniform rod of length 1 is sliding along two mutually perpendicular axes If the velocity of end B is VB 2 4 m s...
- Q An astronaut orbiting the earth in a circular orbit 120 00 above the surface of earth gently drops a spoon out of space ship The spoon will O Fall vertically...
- Q Determine the work done in moving a body of mass m 100 kg slowly from the earth s surface to the infinity Take g 10 m s Radius of earth...
- Q Solar energy reaches the earth at the rate of about 1 4 kW per square meter of surface perpen dicular to the direction of the sun Fig 1 15 By...
- Q Q 5 O 4 A point mass is placed inside a thin spherical shell of radius R and mass M at 202 1 a distance R 2 from the centre...
- Q secured at point Ex A particle of mass m and charge q is attached to a light insulating thread Exactly below point O there is a small ball having charge...
- Q If both the masses and radius of the earth each decreases by 50 the acceleration due to gravity would O Remain same O O O Decrease by 50 Decrease by...
- Q The acceleration due to earth s gravity on a point particle at a height h above the surface of the arth is denoted by 9 h and at a depth...
- Q In the arrangement of capacitors shown in Fig 3 63 the capacitors are initially uncharged and 200V now are connected with switch S open Find the potential of point b...
- Q 15 Example 8 A square of side 4 cmand uniform thic divided into four equal squares as shown in Fig 7 11 If one of the squares is cut off...
- Q There are three planets in circular orbits around a fixed star at distances a 4a and 9a respectively in same sense say anticlockise At time t 0 the star and...
- Q Two satellites A and B of masses 200 kg and 400 kg are revolving round the earth at height of 600 km and 1600 km respectively If TA and Tg...
- Q Choose the correct option The value of acceleration due to gravity is
- Q Questions 8 10 Planet A 2Kx B Kx C D 4R Identical satellites X and Y of mass m are in circular orbits around a planet of mass M The...
- Q divisions which match with 16 main scale division The least count of the vernier calipers is 1 0 02 mm 2 0 2 mm 3 0 8 mm 4 0...
- Q sider two point masses m and 2m at a distance of 3 m in a gravity free space Find the maximum possible velocity vo which can be given to 2m...
- Q In case of an orbiting satellite if the radius of orbit is decreased Answer A B C Your Attempt its KE decreases its PE decreases Its ME decreases Correct answer
- Q A satellite is revolving in a circular orbit of radius 2R R radius of earth The plane of the orbit is in equatorial plane and the direction of rotation of...
- Q If the period of the planet Neptune is 165 0 Earth years what is its orbital radius Ans 4 50x10 2 m If the Earth be at one half of...
- Q 3 If the earth stops rotating the apparent value of g on its surface will a increase everywhere b decrease everywhere c remain the same everywhere d increase at some...
- Q 3 External torque is zero 4 All of these 10 If density of earth is p radius is R then its gravitational field at distance from centre will be 1...
- Q A particle of mass m moves in response to a central force according to Newton s second law mr f r Show that F x c where is a constant...
- Q ng 115 A body weighs 72 N on the surface of the earth What is the gravitational force on it at a height equal to half the radius of the...
- Q e escape velocity of a body projected from thesurface of earth is v If the body is projected at an angle to the horizontal surface of earth then the escape...
- Q at distance r 2r 4r 8r and so on form a reference point O The gravitatonal field intensity at O will be A C GM r 2GM 3r B D...
- Q 14 Satellite X moves around Earth in a circular orbit of radius R Satellite Y is also in a circular orbit around Earth and it completes one orbit for every...
- Q 10 In the following two exercises choose the correct answer from among the given ones The gravitational intensity at the centre of a hemispherical shell of uniform mass density has...
- Q D A block of mass M is hanging over a smooth and light pulley through a light string The other end of the string is pulled by a constant force...
- Q 4 A rocket has landed on Planet X which has half the radius of Earth An astronaut onboard the rocket weighs twice as much on Planet X as on Earth...
- Q The kinetic energies of a planet in an elliptical orbit about the Sun at positions A B and C are KA KB and Kc respectively AC is the major axis...
- Q 27 A planet is moving in an elliptical orbit around the sun If T V E and L stand respectively for its kinetic energy gravitational potential energty total energy and...
- Q 18 A uniform metal ring of mass m and radius r is placed directly above a uniform sphere made up of same metal of mass M and of equal radius...
- Q A clock S is based on oscillation of a spring and a clock P is based on pendulum motion Both clocks run at the same rate on earth On a...
- Q length L and mass M is lying on a smooth table and one third of its length is hanging vertically down over the edge of the table If g is...
- Q 37 R is the radius of earth and is its angular a velocity and ge is the acceleration of gravity at equator The effective value of acceleration due to gravity...
- Q A body of mass m is situated at distance 4Re above the Earth s surface where Re is the radius of Earth How much minimum energy be given to the...
- Q 35 The height h at which the weight of a body will be th same as that at the same depth h from the surface of the eart is Radius...
- Q Three satellites are circling around the earth one along the circular orbit and the other two along elliptical orbi whose major axes are equal to the diameter of the circular...
- Q The acceleration due to gravity on the earth s surface at the poles is g and angular velocity of the earth about the axis passing through the pole is w...
- Q loating the duration of the day would be approximately Take g 10 ms 2 the radius of earth R 6400 10 m Take 3 14 1200 minutes 84 minutes does...
- Q Weight of a body of mass m decreases by 1 when it is raised to height h above the earth s surface If the body is taken to a depth...
- Q Two particles with mass of 1 kg and 2 kg initially at rest start moving towards each other due to mutual gravitational force of attraction If the initial distance between...
- Q The following figure shows two shells of masses m and m The shells are concentric At which point a particle of mass m shall experience zero force 1 A 3...
- Q If three uniform spheres each having mass M and radius R are kept in such a way that each touches the other two the magnitude of the gravitational force on...
- Q a point below the surface of earth equal to half the radius of earth R to a height R above the earths surface then work done on it will be...
- Q a m m m m Four point masses each of mass m are placed on the corner of square of side a Calculate magnitude gravitational force experienced by each particle
- Q A small particle of mass m is attached at one end of a light string of length and other end is connected to the ceiling of a satellite revolving around...
- Q Two bodies A and B have masses M and m respectively where M m and they are at a distance d apart Equal force is applied to each of them...
- Q 4 Find the altitude at which the acceleration due to gravity is 25 of that at the surface of the earth Radius of the earth R 6400 km
- Q 018 part 1 of 3 10 0 points Given G 6 67259 10 1 Nm kg After a supernova explosion a star may un dergo a gravitational collapse to an...
- Q Three identical bodies each mass M are placed at vertices of an equilateral triangle of arm L keeping the triangle as such by which angular speed the bodies should be...
- Q 2 0 m s The force of buoyancy exerted by the atmosphere on a balloon is B in the upward direction and remains constant The force of air resistance on...
- Q Given G 6 67259 x 10 1 Nm kg After a supernova explosion a star may un dergo a gravitational collapse to an extremely dense state known as a neutron...
- Q B A ball is projected upwards from a height h above the surface of the earth with velocity v The time at which the ball strikes the ground is 1...
- Q The gravitational force between two objects is proportional to 1 R and not as 1 R2 where R is separation between them then a particle in circular orbit under such...
- Q b Given that an earth satellite near the earth s surface takes about 90 minutes per revolution and that a moon satellite takes also about 90 minutes per revolution Compare...
- Q A uniform bar AB of mass M and length L has a particle of mass m held at a distance a from end A as shown The gravitational force exerted...
- Q A saturn year is 29 5 times the earth year How far is the saturn from the sun if the earth is 1 5 108 km away from the sun...
- Q Two space stations A and B are orbiting the earth with speed u in the same orbit of radius R Station B is a distance s ahead of station A...
- Q diame as a solid sphere of uniform density Show that if a harmonic motion Calculate the time period of this particle is released in this tunnel it will execute a...
- Q Calculate the ratio of the angular momentum of th earth about its axis due to its spinning motion to the about the sun due to its orbital motion Radius of...
- Q 31 The distance of Neptune and Saturn from sun are nearly 1013 and 1012 meters respectively Assuming that they move in circular orbits their periodic times will be in the...
- Q 6 4 6N Iwo bodies A and B having masses m and 2m respectively are kept at a distance d apart A small particle is to be placed so that...
- Q ith it application of concepts How can you differentiate between a contact force and a force at a distance AS Find the net forces from the following diagrams uscul 5...
- Q If a rocket is fired with a speed v 2 gR near the earth s surface and coasts upwards its speed in the intersteller space is 1 4 gR 3...
- Q Five bodies of mass m m m m mo placed at corners of a pentagon as shown in figure The net ravitational force on body of mass m placed at...
- Q Consider two solid uniform spherical objects of the same density p One has a radius R and the other 2R They are in outer space where the gravitational force due...
- Q 1 If g be the acceleration due to gravity on the earth s surface the gain in the potential energy of an object of mass m raised from the surface...
- Q Gravitational force between two masses at a distance d apart is 6N If these masses are taken to moon and kept at same separation then the force between them will...
- Q Newton s law of gravitation 1 is not applicable out side the solar system 2 is used to govern the motion of satellites only 3 control the rotational motion of...
- Q 4 Mars has a diameter of approximately 0 5 of that of earth and mass of 0 1 of that of earth The surface gravitational field strength on mars as...
- Q A satellite of mass 2000 kg is revolving in elliptical path around earth If mean altitude at perigee and apogee are 1600 km and 5600 km respectively then the energy...
- Q 13 Assume that a tunnel is dug through earth from North pole to south pole and that the earth is a non rotating uniform sphere of density p The gravitational...
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