A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45^@, the speed of the car is

A car of mass 1000 kg negotiates a banked curve of radius 90 m on a fr

1.	A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45^@, the speed of the car is
Answer» `20 ms^(-1)` `30 ms^(-1)` `5 ms^(-1)` `10 ms^(-1)` Solution :Here,`m = 1000kg, r = 90M , theta= 45 ^@` forbanking` tan theta= (v^2)/(Rg)` `orv= sqrt(Rg tan theta )= sqrt(90 xx10 xx tan 45^@ )= 30ms^(-1)`