Question

On a highway two buses A and B are running at the same velocity of magnitude 30ms^(-1) .The brakes cause a deceleration of 30/7ms^(-2) in bus A and that of bus B is 3ms^(-2). In an emergency when driver of the front car applies brakes immediately its rear light turns red and braking begins.In response driver of the rear bus also applies brakes to avoid a collision with the front bus.Every driver takes 1s to apply the brakes after he saw a need for it.If bus A ahead of bus B then the minimum separation between the buses before driver of bus A applies the brake is x1 .If bus B is running ahead of bus A then the minimum separation between the buses before the driver of bus B applies brake is x2. Find the value of x1/3x2​

Answer 1

Answer d < 25

Explanation:

On a highway two buses A and B are running at the same velocity of magnitude 30ms^(-1) .The brakes cause a deceleration of 30/7ms^(-2) in bus A and that of bus B is 3ms^(-2). In an emergency when driver of the front car applies brakes immediately its rear light turns red and braking begins.In response driver of the rear bus also applies brakes to avoid a collision with the front bus.Every driver takes 1s to apply the brakes after he saw a need for it.If bus A ahead of bus B then the minimum separation between the buses before driver of bus A applies the brake is x1 .If bus B is running ahead of bus A then the minimum separation between the buses before the driver of bus B applies brake is x2. Find the value of x1/3x2