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A person walks up a stationary escalation in t 1 second. If he remains stationary on the escalator, then it can take him up in t 2 second. If the length of the escalator is L, then a. Determine the speed of man with respect to the escalator. b. Determine the speed of the escalator. c. How much time would it take him to walk up the moving escalator?
27
Aug
A person walks up a stationary escalation in t 1 second. If he remains stationary on the escalator, then it can take him up in t 2 second. If the length of the escalator is L, then a. Determine the speed of man with respect to the escalator. b. Determine the speed of [...]
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A person walks up a stationary escalation in t 1 second. If he remains stationary on the escalator ,
then a. Determine the speed of man with respect to the escalator. b. Determine the speed of the escalator. c. How much time would it take him to walk up the moving escalator? ,
then it can take him up in t 2 second. If the length of the escalator is L ,
1The Earth may be considered to be a uniform sphere with its massMconcentrated at itscentre.A satellite of massmorbits the Earth such that the radius of the circular orbit isr.(a)Show that the linear speedvof the satellite is given by the expressionv=√GM.r[2](b)For this satellite, write down expressions, in terms ofG,M,mandr, for(i)its kinetic energy,kinetic energy = …………………………. [1](ii)its gravitational potential energy,potential energy = …………………………. [1](iii)its total energy.total energy = …………………………. [2]ForExaminer’sUse© UCLES 2006⎛⎞⎝⎠
27
Aug
1The Earth may be considered to be a uniform sphere with its massMconcentrated at itscentre.A satellite of massmorbits the Earth such that the radius of the circular orbit isr.(a)Show that the linear speedvof the satellite is given by the expressionv=√GM.r[2](b)For this satellite, write down expressions, in terms ofG,M,mandr, for(i)its kinetic energy,kinetic energy = …………………………. [1](ii)its [...]
A bird flies to and fro between two cars which move with velocities v 1 and v 2 . If the speed of the bird is v 3 and the initial distance of separation between them is d, find the total distance covered by the bird till the cars meet.
27
Aug
A bird flies to and fro between two cars which move with velocities v 1 and v 2 . If the speed of the bird is v 3 and the initial distance of separation between them is d, find the total distance covered by the bird till the cars meet. A bird [...]
A satellite of mass 1000kg is rotating around the earth in a circular orbit of radius 3R. What extra energy should be given to this satellite if it is to be lifted into an orbit of radius 4R?
27
Aug
A satellite of mass 1000kg is rotating around the earth in a circular orbit of radius 3R. What extra energy should be given to this satellite if it is to be lifted into an orbit of radius 4R? A satellite of mass 1000kg is rotating around the earth in a circular orbit of radius 3R. [...]
A car A moves with velocity 15 m s^(-1) and B with velocity 20 m s^(-1) are moving in opposite directions as shown in . Find the relative velocity of B w.r.t. A and w.r.t. B.
27
Aug
A car A moves with velocity 15 m s^(-1) and B with velocity 20 m s^(-1) are moving in opposite directions as shown in . Find the relative velocity of B w.r.t. A and w.r.t. B. A car A moves with velocity 15 m s^(-1) and B with velocity 20 m s^(-1) are moving in [...]
A satellite is revolving round the earth in a circular orbit of radius `r` and velocity `upsilon_(0)`. A particle is projected from the satellite in forward direction with realative velocity `upsilon = (sqrt(5//4) – 1) upsilon_(0)`. Calculate its minimum and maximum distances from earth’s centre during subsequent motion of the particle.
27
Aug
A satellite is revolving round the earth in a circular orbit of radius `r` and velocity `upsilon_(0)`. A particle is projected from the satellite in forward direction with realative velocity `upsilon = (sqrt(5//4) – 1) upsilon_(0)`. Calculate its minimum and maximum distances from earth’s centre during subsequent motion of the particle. August 27, 2020 Category: [...]
A car A moves with velocity 15 m s^(-1) and B with velocity 20 m s^(-1) are moving in opposite directions as shown in . Find the relative velocity of B w.r.t. A and w.r.t. B.
27
Aug
A car A moves with velocity 15 m s^(-1) and B with velocity 20 m s^(-1) are moving in opposite directions as shown in . Find the relative velocity of B w.r.t. A and w.r.t. B. A car A moves with velocity 15 m s^(-1) and B with velocity 20 m s^(-1) are moving in [...]
The motion of a particle along a straight line is described by equation x = 8 + 12 t – t^3 where x is in metre and t in second. The retardation of the particle when its velocity becomes zero is
27
Aug
The motion of a particle along a straight line is described by equation x = 8 + 12 t – t^3 where x is in metre and t in second. The retardation of the particle when its velocity becomes zero is The motion of a particle along a straight line is described by equation x [...]
A stone falls freely under gravity. It covers distances h1,h2 and h3 in the first 5 seconds, the next 5 seconds and the next 5 seconds respectively. The relation between h1,h2 and h3 is
27
Aug
A stone falls freely under gravity. It covers distances h1,h2 and h3 in the first 5 seconds, the next 5 seconds and the next 5 seconds respectively. The relation between h1,h2 and h3 is A stone falls freely under gravity. It covers distances h1 h2 and h3 in the first 5 seconds h2 and h3 [...]
Ball 1 is released from the top of a smooth inclined plane, and at the same instant ball 2 is projected from the foot of the plane with such a velocity that they meet halfway up the incline. Determine: a. the velocity with which balls are A1 projected and b. the velocity of each ball when they meet.
27
Aug
Ball 1 is released from the top of a smooth inclined plane, and at the same instant ball 2 is projected from the foot of the plane with such a velocity that they meet halfway up the incline. Determine: a. the velocity with which balls are A1 projected and b. the velocity of each ball [...]