Question

A car is moving in a straight line with a speed 18kmpl. It is stopped in 5 second by applying the brakes find :
1) speed of car in metre per second
2) the retardation
3) the speed of the car after 2 seconds of applying the brakes​

Answer 1

answer:

Given, Speed=18km/h,t=5s

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18×

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 18

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/s

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a=

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= t

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= tv−u

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= tv−u

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= tv−u =

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= tv−u = 5

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= tv−u = 50−5

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= tv−u = 50−5

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= tv−u = 50−5 =1m/s

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= tv−u = 50−5 =1m/s 2

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= tv−u = 50−5 =1m/s 2

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= tv−u = 50−5 =1m/s 2 c) The velocity of the as a funcition of time 2sis:

Given, Speed=18km/h,t=5sa)The speed of the car in m/s=18× 185 =5 m/sb) The retardation is:a= tv−u = 50−5 =1m/s 2 c) The velocity of the as a funcition of time 2sis:v(t)=5−t⇒v(t)=5−2=3m/s=10.8 km/h