Tagential and centripetal acceleration problem. Help please!?
2007-03-18 2:18 pm
The particle does a circular move with a radius R=0.2m with a tangential acceleration a=5m/s^2. How much time after the start of the move, the centripetal acceleration will be equal to the tangential acceleration?
回答 (1)
2007-03-18 3:18 pm
✔ 最佳答案
centripetal acc, a_c = v^2/r ----- (1)Use tangential acc, a_t (given), to find velocity v at time t:
v = ut + 1/2 a_t * t^2 = 0.5*5*t^2 = 2.5t^2
Subt v in terms of t into (1) and take a_c = a_t = 5m/s^2. Then solve for the remaining variable t.
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