braking news

A tain moving at 30 m//s reduces its speed to 10 m//s due to braking in a distance of 240m. Now the braking force is increased by 12(1)/(2)% . Find the stoping distance in the new situation if the train is mobing with the same initial speed 30 m//s

A driver travelling at 90 kph applied the brakes for 5 s. If the braking acceleration was 2 m//s^(2) , what was her final speed ?

On what principle does the hydraulic brakes in a vehicle work ?

Why is a liquid (the hydraulic fluid) used to operate the brakes in a car ?

Braking froce per unit area of cross section of a wire is called

A car is initially travelling at 50.0 km/h. The brakes are applied and the car stops over a distance of 35 m. What was magnitude of the car's acceleration while it was braking ?

A car is travelling on road at 50kmh^-1 . The driver applies brakes and brings the car to rest. Which frictional force does more work: (a) the force between the wheels and the brakes or (b) the force between the wheels and the road?

When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then retardation will be :