Velocity of car is 30m/s and suddenly a dog comes on the way of car and driver applies brakes and car stops 4 seconds after applying brakes. If total mass of cae is 1000kg then calculate force excerted on car by brakes.

Velocity of car is 30m/s and suddenly a dog comes on the way of car an

1.	Velocity of car is 30m/s and suddenly a dog comes on the way of car and driver applies brakes and car stops 4 seconds after applying brakes. If total mass of cae is 1000kg then calculate force excerted on car by brakes.
Answer» question we are given the initial velocity (u) as 30 m/s and it is said in question that, suddenly a DOG comes on the way of car and driver applies the brakes and car STOPS so, final velocity (v) will be 0 m/s and time interval (t) is 4 second and it is also given that,the total mass (m) of the car is 1000 kg. We are asked to find the force exerted on car by brakes.To solve this numerical first we need to find the acceleration (a) of the car and after FINDING the acceleration we can find the force exerted on car by brakes by USING Newton's second law. So,let's do it :

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Velocity of car is 30m/s and suddenly a dog comes on the way of car and driver applies brakes and car stops 4 seconds after applying brakes. If total mass of cae is 1000kg then calculate force excerted on car by brakes.​

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Velocity of car is 30m/s and suddenly a dog comes on the way of car and driver applies brakes and car stops 4 seconds after applying brakes. If total mass of cae is 1000kg then calculate force excerted on car by brakes.