A body travels 200cm.in the first 2second, and 220cm in the next 4second . what will be the velocity at the end of the seventh second from the start
Answer (1)
16th Jan, 2022
Hello, I hope you are doing well
This problem can be solved using the formula:
S = Ut + 1/2at 2
Case 1:
200 = 2u + 2a
u + a = 100.....(1)
Case 2: (for next 4 seconds)
distance = 420 cm, time = 6s
420 = 6u + 18a
u + 3a = 70.....(2)
On solving equation (1) and (2) we get,
u = 115 cm/s, a = -15c m/s 2
Now, using v = u + at
v = 115 - 15*7
v = 10 cm/s
Hope this helps
Comments (0)
