A car starts from rest with an acceleration of 6 m/s2 which decreases to zero linearly with time, in 10 seconds, after which the car continues at a constant speed. Find the time required for the car to travel 400 m from the start.
Asked by Arushi Juyal
12th November 2017,
3:07 PM
Answered by Expert
Answer:
Acceleration decreases from initial value 6 m/s2 to zero in 10 seconds. Hence acceleration is function of time.
From the definition of acceleration we can write
From the above relation, we can get the velocity after 10 second is 30 m/s
Distance travelled for the time 10 second is given by
So initial 200 m travelled in 10 seconds and the next 200 m is travelled with constant speed 30 m/s.
Hence total time is 10+6.66 = 16.66 s
Answered by Expert
15th November 2017,
1:59 PM
Rate this answer
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
You have rated this answer 10/10
Your answer has been posted successfully!
RELATED STUDY RESOURCES :
NEET QUESTION ANSWERS
Trending Tags
Latest Questions
JEE Main Mathematics
Asked by amaladelsingh
28th October 2020,
10:24 PM
CBSE X Biology
Asked by reenacharan2008
28th October 2020,
9:11 PM
