How can you answer part c?
Answers
Answer:
7.5 sec
Step-by-step explanation:
Total time taken = 15sec
Half of that time is 7.5 sec.
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Given : velocity time Graph
To Find : acceleration
Distance covered in 15 secs
Time take to cover half distance
Solution:
velocity time Graph is straight line hence constant acceleration
a = dv/dt
a = ( 30 - 0)/ ( 15 - 0) = 2 m/s²
V = u + at
u = 0
=> V = at
Distance covered in 15 secs
= (1/2) (0 + 30) * 15
= 225 m
Half distance = 225/2 m
time = t
v = at
=> (1/2)( 0 + at) * t = 225/2
=> at² = 225
=> 2t² = 225
=> t² = 225/2
=> t = 15/√2
=> t = 10.605 sec
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