Advertisements
Advertisements
प्रश्न
If a bus travelling at 20 m/s is subjected to a steady deceleration of 5 m/s2, how long will it take to come to rest ?
उत्तर
We have to find the time taken to reach the given final velocity.
We have:
Initial velocity (u) = 20 m/s
Final velocity (v) = 0 m/s
Acceleration for the entire journey (a) = –5 ms2.
Let the time taken be (t).
We can calculate the time taken using the first equation of motion.
`t = (v-u)/a`
Time taken by the bus to come to rest:
= `(0-20)/-5`
= 4 s
APPEARS IN
संबंधित प्रश्न
What does the path of an object look like when it is in uniform motion?
Change the speed of 6 m/s into km/h.
What name is given to the speed in a specified direction ?
Convert a speed of 54 km/h into m/s.
A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds:
How far does it travel in 1 second ?
Give one example of a motion where an object does not change its speed but its direction of motion changes continuously.
The tip of seconds’ hand of a dock takes 60 seconds to move once on the circular dial of the clock. If the radius of the dial of the clock be 10.5 cm, calculate the speed of the tip of the seconds’ hand of the clock. `("Given" π= 22/7)`.
What do you mean by motion in one direction?
Define variable velocity and give one example.
