CBSE Class 9CBSE
Share
Notifications

View all notifications

Find the Initial Velocity of a Car Which is Stopped in 10 Seconds by Applying Brakes. the Retardation Due to Brakes is 2.5 M/S2. - CBSE Class 9 - Science

Login
Create free account


      Forgot password?

Question

Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. The retardation due to brakes is 2.5 m/s2.

Solution

We have to find the initial velocity.
Final velocity as the car stops after some time, (v) = 0 m/s
Acceleration for the entire journey, (a) = –2.5 m/s2
Time taken is (t) = 10 s
Let the initial velocity be (u) 
We can calculate initial velocity using 1st equation of motion as, u = v – at
So initial velocity,
u = 0 – (–2.5)(10)
⇒ u = 25 m/s

  Is there an error in this question or solution?

APPEARS IN

Video TutorialsVIEW ALL [1]

Solution Find the Initial Velocity of a Car Which is Stopped in 10 Seconds by Applying Brakes. the Retardation Due to Brakes is 2.5 M/S2. Concept: Rate of Change of Velocity.
S
View in app×