A boy is moving on a straight road against a frictional force of 5 N. After travelling 1.5 km, he forgot the path at cross roads of radius 100m. He moves on the circular path for one and half cycle and then he moves forward up to 2 km. Calculate the work done by him.

A body moves on a circular path of radius 1 m. It completes one circle in 2 seconds. Find its speed.

A particle moves alog the x - axis from x=0 to x=5 m under the influence off a force given by F=7-2x+3x^2 .Calculate the work done in doing so.

A mass of 5 kg is moving along a circular path of radius 1 m. If the mass moves with 300 revolutions per minute, its kinetic energy would be

A cyclist is moving on a circular track of radius 80 m with a velocity of 72 km//h .He leans from the direction through an angle of :

A car of mass 1000 kg moves on a circular road with a speed of 20 ms^-1 . Its direction changes by 90^@ after travelling 628 m on the road. The centripetal force acting on the car is

A rain drop of radius 2 mm falls from a height of 500 nr above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original height, it attains its maximum (terminal) speed, and moves with uniform speed thereafter. What is the work done by the gravitational force on the drop in the first and second half of its journey ? What is the work done by the resistive force in the entire journey if its speed on reaching the ground is 10 m s^-1 ?

A man travels 30m due north on a straight road and reaches a road junction. He then turns through 90^@ towards th east and moves 40m straight.Find what is the distance travelled.

A man travels 30m due north on a straight road and reaches a road junction. He then turns through 90^@ towards th east and moves 40m straight.Find what is the displacement?

A car is moving at a constant speed of 60kmh^-1 on a straight road. Looking at the rear view mirror, the driver finds that the car following him is at a distance of 100 m and is approaching with a speed of 5 kmh^-1 . In order to keep track of the car in the rear, the driver begins to glance alternatively at the rear and side mirror of his car after every 2 s till the other car overtakes. If the two cars were maintaining thier speed, whihc of the following statement is/are correct?