Question

A person is moving on a person is moving on the ground with speed 5 kilometres per minute rain drops are falling vertically downwards he experience that drops are hitting him at an angle of 30 degree with the vertical For what speed of man ,he will experience drops are hitting him at an angle of 30 degree with the horizontal

Answer 1

Answer:

Here, radius of curve, r=50m and banking angle, θ=15∘

We have to find out the ideal speed v (the speed for which no friction is required between the car's tires and the surface)

we know that the critical speed for an automobile without overturning in the absence of friction is given by v=rgtanθ=50×9.8×tan15=11m/s

If the car has a speed of about 11 m/s, it can negotiate the curve without any friction.

The correct option is (c)