An aircraft executes horizontal loop of radius 1 km with constant speed 900 km/hr. How many times is centripetal acceleration greater than acceleration due to gravity?

A body of mass 1 kg is revolving in horizontal circle of radius 2 m. it is performs 420 r.p.m. Calculate Centripetal acceleration

If the density of the earth is doubled, by keeping it’s radius constant, then what will be the acceleration due to gravity ?

A rocket of initial mass 6000 kg ejects gases at a constant rate of 16 kg/s with constant relative speed of 11 km/s. What is the acceleration of the rocket one minute after the blast.

A figher plane flying horizontal at an altitude of 1.5 km with a speed of 720 km/h passed directly overhead an anti-aircraft gun. At what angle from the vertical shoud the gum be fired for the shell with muzzle velocity of 600 m/s to hit the plane ? At what minimum altitude should the pilot fly to avoid being hit ? g= 9.8 m/ s^2

A jeep moving at a speed of 50 km/hr reaches the foot of smooth incline where its engine is switched off. How much distance does the jeep go up the incline before coming to rest ? The inclination of the plane to the horizontal is 45^@ and the acceleration due to gravity at the place is 9.8m/s^2