A car is traveling towards North at 30 km/h. It rounds a curve, and 3.0 s later it is traveling towards East at 35 km/h Find the average acceleration of the car
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Answered by
0
Answer:
Correct option is
B
24kmh
−1
Let distance from A to B be x
Time for travel from A to B= x/20
Time for travel from B to A= x/30
Hence,speed for total distance 2x is:
30
x
+
20
x
2x
=
5x
2x×60
=24 km\hr
Answered by
0
Explanation:
Given that =30km/h=325m/s and R=60m
assume that mass of vehicle is m
as the diagram(FBD) shows, if vehicle driven on a curved unbanked road, the friction force towards the center balance out the centrifugal force, we get three equations from here
N=mg...(1)f=μN...(2)f=mRv2...(3)
putting the valur of N in eqn(2) and then putting the valur of f in eqn(3)
⇒μ=Rgv2=60×10(325)2=0.1181
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