Calculate the angular speed of a car which rounds a curve of radius 8 m at a speed of 50 km/h .

Mass of an electron is 9xx10^(-31) kg. It revolves round the nucleus of an atom in a circular orbit of radius 4.0 Å with a speed of 6 xx 10^(6) m.s^(-1) . Calculate the linear kinetic energy and the angular momentum of the electron .

An automobile driver travels from plain to a hill station 120 km distant at an average speed of 30 km per hour. He then makes the return trip at an average speed of 25 km per hour. He covers another 120 km distance on plain at average speed of 50 km. per hour . His average speed over the entire distance of 360 km will be

The roadway bridge over a stream is in the form of an arc of a circle of radius 50 m. What is the maximum speed with which a car can cross the bridge without leaving the ground at the highest point?

A jet airplane travelling at the speed of 500 km h^(-1) ejects its products of combustion at the speed of 1500 km h–1 relative to the jet plane. What is the speed of the latter with respect to an observer on the ground ?

A car passes over a convex bridge. The centre of gravity of the car follows an arc of a circle of radius 30 m. Assuming that the car has a mass of 1000 kg, find the force that the car will exert at the highest point on the bridge, if the velocity of the car is 15 m cdot s^(-1) . At what speed will the car lose contact with the road?