3 The ball below left has been falling for 5 seconds
a What is its acceleration?
b What is its speed?
c What is its average speed?
d What height has it fallen?
Answers
Answered by
2
Answer:
please tell me which part should I answer
Answered by
1
Answer:
(a) 9.8m/s²
(b) 49m/s
(c) 24.5m/s
(d) 122.5m
Explanation:
Given,
Time (t) = 5se
Initial Velocity (u) = 0 ; (starting from rest)
Acceleration (a) = g = 9.8m/s² ; (The object is undergoing freefall)
We know that,
⇒ v = u + at
⇒ v = 0 + 9.8 * 5
= 49m/s
We also know that,
⇒ S = ut + 1/2at²
⇒ S = 0 + 1/2 * 9.8 * 5²
= 122.5m
We have,
Average Velocity = Total Displacement/Time taken
= 122.5/5
= 24.5m/s
I hope that this helps you, mate!
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