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deff fn [24]
3 years ago
10

Can somone help me with this problem I have been stuck on it for a while. The answer is 17.1m but I dont understand how to get i

t. If you dont know dont answer or I will report you.

Physics
1 answer:
Musya8 [376]3 years ago
8 0

Hi There, Buddy!

To solve this problem, let us divide the entire motion into 2 phases

1.) When the elevator is moving with an acceleration

2.) When the elevator has a deceleration

For the first half -

u = 0 , a = 0.6 , t = t1

v = 0.6(t1)  ---------- ( 1 )

s = 1/2 x 0.6 x (t1)^2 = 0.3(t1^2) -------- ( 2 )

For the second half -

u = 0.6(t1) , a = -0.8 , v = 0

0.6 x (t1) = 0.8 (t2) ----> 3(t1) = 4(t2) ---------- ( 3 )

0.36(t1)^2 = 1.6 s2 ---------- ( 4 )

Now, we know that the total time taken is 10 seconds

------- t1 + t2 =10 , 3t1 = 4t2 ---- t1 = 40/7 , t2 = 30/7

Now, substitute values of t1 and t2 in s1 and s2 and add both s1 and s2 to get total distance travelled.

PLEASE MARK AS BRAINLIEST!

If you liked the answer, please visit my website abcd123iitians.wixsite/mysite for Physics Questions and solutions. Thanks!!!

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