Cengage JEE Mains Physics by B.M Sharma
In the solar system, the Sun is in the focus of the system for Sun-earth binding system. Then the binding energy for the system will be [given that radius of the earth’s orbit around the Sun is 1.5×10^11m and mass of the earth = 6×10^24kg]
13
Sep
In the solar system, the Sun is in the focus of the system for Sun-earth binding system. Then the binding energy for the system will be [given that radius of the earth’s orbit around the Sun is 1.5×10^11m and mass of the earth = 6×10^24kg] A rocket is launched vertically from the surface of earth [...]
The earth moves around the Sun in an elliptical orbit as shown in the given figure. The ratio OA/OB=x. The ratio of the speed of the earth at B to that at A is nearly:
13
Sep
The earth moves around the Sun in an elliptical orbit as shown in the given figure. The ratio OA/OB=x. The ratio of the speed of the earth at B to that at A is nearly: The earth moves around the Sun in an elliptical orbit as shown in the given figure. The ratio OA/OB=x. The [...]
Two satellites of masses m1 and m2 (m1>m2) are revolving around the earth in a circular orbit of radii r1 and r2 (r1>r2), respectively. Which of the following statements is true regarding their speeds v1 and v2?
13
Sep
Two satellites of masses m1 and m2 (m1>m2) are revolving around the earth in a circular orbit of radii r1 and r2 (r1>r2), respectively. Which of the following statements is true regarding their speeds v1 and v2? respectively. Which of the following statements is true regarding their speeds v1 and v2? Two satellites of masses [...]
The value of g at a particular point is 10ms^−2. Suppose the earth shrinks uniformly to half of its present size without losing any mass. The value of g at the same point (assuming that the distance of the point from the centre of the earth does not change) will now be
13
Sep
The value of g at a particular point is 10ms^−2. Suppose the earth shrinks uniformly to half of its present size without losing any mass. The value of g at the same point (assuming that the distance of the point from the centre of the earth does not change) will now be A rocket is [...]
A solid sphere of uniform density and radius R applies a gravitational force of attraction equal to F1 on a particle placed at a distance 2R from the centre of the sphere. A spherical cavity of radius R/2 is now made in the sphere as shown in the figure. The sphere with the cavity now applies a gravitational force F2 on the same particle. The ratio F1/F2 is
13
Sep
A solid sphere of uniform density and radius R applies a gravitational force of attraction equal to F1 on a particle placed at a distance 2R from the centre of the sphere. A spherical cavity of radius R/2 is now made in the sphere as shown in the figure. The sphere with the cavity now [...]
A body is released from a point of distance R’ from the centre of the earth. Its velocity at the time of striking the earth will be (R′>Re).
13
Sep
A body is released from a point of distance R’ from the centre of the earth. Its velocity at the time of striking the earth will be (R′>Re). A body is released from a point of distance R' from the centre of the earth. Its velocity at the time of striking the earth will be [...]
Two bodies of masses M1 and M2 are placed at a distance R apart. Then at the position where the gravitational field due to them is zero, the gravitational potential is
13
Sep
Two bodies of masses M1 and M2 are placed at a distance R apart. Then at the position where the gravitational field due to them is zero, the gravitational potential is the gravitational potential is Two bodies of masses M1 and M2 are placed at a distance R apart. Then at the position where the [...]
How many hours would make a day if earth were rotating at such a high speed that the weight of a body on the equator were zero ?
13
Sep
How many hours would make a day if earth were rotating at such a high speed that the weight of a body on the equator were zero ? How many hours would make a day if earth were rotating at such a high speed that the weight of a body on the equator were zero [...]
A ball of mass m is fired vertically upwards from the surface of the earth with velocity nνe, where νe is the escape velocity and n>1. To what height will the ball rise? Neglecting air resistance, take radius of the earth as R
13
Sep
A ball of mass m is fired vertically upwards from the surface of the earth with velocity nνe, where νe is the escape velocity and n>1. To what height will the ball rise? Neglecting air resistance, take radius of the earth as R A ball of mass m is fired vertically upwards from the surface [...]
The gravitational potential due to earth at infinite distance from it is zero. Let the gravitational potential at a point P be −5 J kg^−1. Suppose, we arbitrarily assume the gravitational potential at infinity to be +10 J kg^−1, then the gravitational potential at P will be
13
Sep
The gravitational potential due to earth at infinite distance from it is zero. Let the gravitational potential at a point P be −5 J kg^−1. Suppose, we arbitrarily assume the gravitational potential at infinity to be +10 J kg^−1, then the gravitational potential at P will be The gravitational potential due to earth at infinite [...]