Home
Class 7
PHYSICS
A car moving along a straight road with ...

A car moving along a straight road with a speed of 72 km ` h^(-1)` , is brought to rest within 3 s after the application of brakes. Calculate the deceleration produced by the brakes.

Text Solution

Verified by Experts

Initial velocity 'u' = `720 km h^(-1) = 72 xx 5/18 = 20 ms^(-1)`
Final velocity , v=0 m `s^(-1)`
Time = t=3s
`(v-u)/t= a`
` (0 -20)/3 =a Rightarrow "deceleration" = - 6.67 m s^(-2)`
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS

    PEARSON IIT JEE FOUNDATION|Exercise Test 1|15 Videos

  • KINEMATICS

    PEARSON IIT JEE FOUNDATION|Exercise EXAMPLE|4 Videos

  • KINEMATICS

    PEARSON IIT JEE FOUNDATION|Exercise Level 2|18 Videos

  • HEAT

    PEARSON IIT JEE FOUNDATION|Exercise Test 2|14 Videos

  • LIGHT

    PEARSON IIT JEE FOUNDATION|Exercise ASSESSMENT TEST (TEST 2 (SELECT THE CORRECT ALTERNATIVE))|15 Videos

Similar Questions

Explore conceptually related problems

A car is moving along a straight level road with constant speed. Then

A car moving along a straight road with speed of 144 km h^(-1) is brought to a stop within a distance of 200 m. How long does it take for the car to stop ?

A car moving along a straight highway with a speed of 72 km h^(-1) is brought to a stop within the distance of 100 m . What is the retardation of the car and how long does it take for the car to stop ?

A bus moving along a straigth highway with a speed of 72 km h^(-1) is brought to rest within a distacne of 50m. How long does it take for the bus to stop?

A car moving along a stainght highway with a speed of 72 kmh^(-1) is brought to a stop within a distance of 100m. What is the retardation of the car and how long does it takes for the car to stop ?

A car moving aling a straight highway with speed of 126 km h^(-1) is brought to a stop within a distance of 200 m . What is the retardation of the car (assumed uniform ) ans how doest it take fro the car to stop ?