Science
An artificial satellite is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.
Motion in One Dimension
64 Likes
Answer
Given,
Radius of the orbit (r) = 42250 km
∴ circumference of the orbit
= 2 x x r
= 2 x x 42250
= 265571.42 km
Time taken to complete one revolution in the orbit = 24 hours
Convert hours into sec
1 hour = 3600 sec
So, 24 hour = 24 x 3600 sec
Speed =
Substituting we get,
Speed = = 3.07 kms-1
∴ Speed of the artificial satellite = 3.07 kms-1.
Answered By
48 Likes
Related Questions
Fig below shows the distance-time graph of three objects A, B and C. Study the graph and answer the following questions:
(a) Which of the three is travelling the fastest?
(b) Are all three ever at the same point on the road?
(c) How far has C travelled when B passes A?
(d) How far has B travelled by the time it passes C?
A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 ms-2, with what velocity will it strike the ground? After what time will it strike the ground?
The speed-time graph for a car is shown in Fig. below
(a) Find how far does the car travel in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period.
(b) Which part of the graph represents uniform motion of the car?
State which of the following situations are possible and give an example for each of these:
(a) an object with a constant acceleration but with zero velocity
(b) an object moving with an acceleration but with uniform speed.
(c) an object moving in a certain direction with an acceleration in the perpendicular direction.