A car is travelling at a speed of 72 km/hr. Brakes are applied so as to produce a uniform acceleration of -0.5m/s². Find how far the car will go before it is brought to rest?
Answers
Answered by
0
Answer:
200
Explanation:
v=0
u = 72km/hr = 20m/s
v^2 =u ^2 -2as
s = u^2/2a
s = -400/2
s = -200m
s= 200 m in opposite directions
Answered by
0
Answer:
Initial valocity=72km/h
acceleration=-0.5m/s²
conversation of km/h to m/s =
72×5/18
=20m/s
Apply formula
2as=v²-u²
s=v²-u²/2a
S = 0²-20²/2×0.5
S = -400/1
S = 400m
Ans -- the car will travel 400m after brake was applied
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