find the displacement taken place in 10 second if the velocity of a car is 72km/h ?
Answers
Answer:
Explanation:
Initial Velocity = u = 0
Final velocity = v = 72 km/hr
= 72 ×
18
5
= 20 m/s
Time = t = 10 sec
Acceleration = a
Equation of motion :-
v = u + at
20 = 0 + 10a
a =
10
20
a = 2 m/s
2
displacement = distance traveled = s
Equation of motion :-
v
2
−u
2
= 2as
20
2
=2×2×s
400 = 4s
s =
4
400
s = 100 m
Average velocity =
time
displacement
=
10
100
= 10 m/s
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