Advertisements
Advertisements
Question
During an experiment, a signal from a spaceship reached the ground station in five minutes. What was the distance of the spaceship from the ground station? The signal travels at the speed of light, that is, 3 × 108m s−1.
Advertisements
Solution
Time taken by the signal to reach the ground station from the spaceship.
= 5 min
= 5 × 60
= 300 s
Speed of the signal = 3 × 108 m/s
`"Speed"="Distance travelled"/"Time taken"`
∴ Distance travelled = Speed × Time taken
= 3 × 108 × 300
= 9 × 1010 m
Hence, the distance of the spaceship from the ground station is 9 × 1010 m.
APPEARS IN
RELATED QUESTIONS
Name the physical quantity obtained by dividing ‘Distance travelled’ by ‘Time taken’ to travel that distance.
Write the formula for acceleration. Give the meaning of each symbol which occurs in it.
A motorcyclist starts from rest and reaches a speed of 6 m/s after travelling with uniform acceleration for 3 s. What is his acceleration ?
When is a body said to be in motion?
Express the following in m s−1.
1 km h−1
A train takes 2 h to reach station B from station A, and then 3 h to return from station B to station A. The distance between the two stations is 200 km. Find:
The average speed,
The average velocity of the train.
A car moving on a straight path covers a distance of 1 km due east in 100 s. What is the speed of the car?
For the motion with uniform velocity , how is the distance travelled related to the time ?
What are the uses of equations of motion?
Distinguish between speed and velocity.
