a body travels at uniform speed of 3 m/sor 20 sec,thenit stops for 10 sec and then travels at uniform speed of 2 m/s for 30 sec.its average speed during he motion
Answers
Answer:
2 m/s
Explanation:
Average Speed = Total Distance/Total Time
Distance = Speed × Time
= 3 × 20 + 0 × 10 + 2 × 30
= 60 + 0 + 60
= 120 m
Total Distance = 120 m
Total time = 20 + 10 + 30 = 60 s
Average Speed = 120/60
= 2 m/s
Answer:
Explanation:
1 st case -
Speed of the body = 3m/sec
Time taken = 20 sec
Distance covered = speed * time
= (3 * 20)km
= 60 km
2 nd case -
Speed of the body = 2m/sec
Time taken = 30 sec
Distance = speed * time
= (2 * 30)km
= 60 km
Average speed = Total Distance
Total Time
= 60 + 60 m
20+50 sec
= 120 m
70 s
= 1.71 m/sec
= 2 m/sec (App.)