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A satellite of mass m is orbiting the earth in a circular orbit of radius r. It starts losing energy due to small air resistance at the rate of C J/s. Then the time taken for the satellite to reach the earth is
27
Aug
A satellite of mass m is orbiting the earth in a circular orbit of radius r. It starts losing energy due to small air resistance at the rate of C J/s. Then the time taken for the satellite to reach the earth is A satellite revolving in a circular equatorial orbit of radius R=2.0×10 4 [...]
A ball is thrown downwards with a speed of 20 m s^(-1), from the top of a buling 150 m high and simultane-ously another ball is throun vertically upwrds wuth a speed of 30 m s^(-1) from the foot ot the building . Find the time after wguch both the balls will meet. (g=10 m s^(-2))
27
Aug
A ball is thrown downwards with a speed of 20 m s^(-1), from the top of a buling 150 m high and simultane-ously another ball is throun vertically upwrds wuth a speed of 30 m s^(-1) from the foot ot the building . Find the time after wguch both the balls will meet. (g=10 m [...]
The displacement x of a particle varies with time t as x = ae^−αt + be^βt, Where a, b, α and β are positive constants. The velocity of the particle will:
27
Aug
The displacement x of a particle varies with time t as x = ae^−αt + be^βt, Where a, b, α and β are positive constants. The velocity of the particle will: B The displacement x of a particle varies with time t as x = ae^−αt + be^βt Where a α and β are positive [...]
A particle moves along a straight line OX. At a time t(in seconds) the distance x(in meters)of the particle from 0 is given by:-x = 40 + 12t − t3. How long would the particles travel before coming to rest?
27
Aug
A particle moves along a straight line OX. At a time t(in seconds) the distance x(in meters)of the particle from 0 is given by:-x = 40 + 12t − t3. How long would the particles travel before coming to rest? A car moves from X to Y with a uniform speed vu and returns to [...]
Two bodies A(of mass 1kg) and B (of mass 3kg) are dropped from heights of 16m and 25 m. Respectively. The ratio of the time taken to reach the ground is :
27
Aug
Two bodies A(of mass 1kg) and B (of mass 3kg) are dropped from heights of 16m and 25 m. Respectively. The ratio of the time taken to reach the ground is : Two bodies A(of mass 1kg) and B (of mass 3kg) are dropped from heights of 16m and 25 m. Respectively. The ratio of [...]
The position x of a particle with respect to time t along x−axis is given by x = 9t^2 − t^3 where x is in metres and t in seconds. What will be the position of this particle when it achieves maximum speed along the + x direction?
27
Aug
The position x of a particle with respect to time t along x−axis is given by x = 9t^2 − t^3 where x is in metres and t in seconds. What will be the position of this particle when it achieves maximum speed along the + x direction? A car moves from X to Y [...]
An artificial satellite (mass m) of a planet (mass M) revolves in a circular orbit whose radius is n times the radius R of the planet in the process of motion the satellite experiences a slight resistance due to cosmic dust. Assuming the force of resistance on satellite to depend on velocity as F=av2 where ‘a’ is a constant caculate how long the satellite will stay in the space before it falls on to the planet’s surface.
27
Aug
An artificial satellite (mass m) of a planet (mass M) revolves in a circular orbit whose radius is n times the radius R of the planet in the process of motion the satellite experiences a slight resistance due to cosmic dust. Assuming the force of resistance on satellite to depend on velocity as F=av2 where [...]
Two particles A and B are thown vertically upward with velocity, vertically upward with velocity, 5 m s^(-1) and 10 m s^(-1) respectively (g=10 m s^(-2)), Find separation between them after 1 s.
27
Aug
Two particles A and B are thown vertically upward with velocity, vertically upward with velocity, 5 m s^(-1) and 10 m s^(-1) respectively (g=10 m s^(-2)), Find separation between them after 1 s. 5 m s^(-1) and 10 m s^(-1) respectively (g=10 m s^(-2)) Find separation between them after 1 s. Two particles A and [...]
A satellite revolving in a circular equatorial orbit of radius R=2.0×10 4 from west to east appears over a certain point at the equator every 11.6h. From these data, the mass of the earth is x×10 24 kg Find x. G=6.67×10 −11 Nm 2 Kg −2
27
Aug
A satellite revolving in a circular equatorial orbit of radius R=2.0×10 4 from west to east appears over a certain point at the equator every 11.6h. From these data, the mass of the earth is x×10 24 kg Find x. G=6.67×10 −11 Nm 2 Kg −2 A satellite revolving in a circular equatorial orbit of [...]
A car travelling ast 60 km/h overtakes another car travellign at 42 km/h. Assuming each car to be 5.0 m long, find the time taken during the overtake aned the total road distance used for the overtake.
27
Aug
A car travelling ast 60 km/h overtakes another car travellign at 42 km/h. Assuming each car to be 5.0 m long, find the time taken during the overtake aned the total road distance used for the overtake. A car travelling ast 60 km/h overtakes another car travellign at 42 km/h. Assuming each car to be [...]