KinematicsHard
Question
If a car at rest accelerated uniformly to a speed of 144 km/hour in 20 second it covers a distance :
Options
A.400m
B.1440m
C.2880m
D.25m
Solution
u = 0, v = 144km/hour = 144 ×
m/sec
= 40 m/sec
v = u + at
⇒ a =
= 2m/sec2
∴ s = ut +
at2
× 2 × (20)2 = 400m
m/sec= 40 m/sec
v = u + at
⇒ a =
= 2m/sec2∴ s = ut +
at2× 2 × (20)2 = 400mCreate a free account to view solution
View Solution FreeMore Kinematics Questions
A point move in a straight line under the retardation av2. If the initial velocity is u, distance covered in ‘t’ seconds...A body starts from rest and is uniformly accelerated for 30 s. The distance traveled in the first 10 s is x1, next 10 is...A particle covers half of its toatl distance with speed v1 and the rest half distance withspeed v2 . Its average speed o...The speed of projectile at its maximum height is half of its initai speed. The angle of projection is...A plane surface is inclined making an angle θ with the horizontal. From the bottom of this inclined plane, a bullet...