Mechanics | Relativity Answers

An airplane travels 209 km on a straight course at an angle of 22.5° east of north. It then changes course by moving 100 km north before reaching its destination. Determine the resultant displacement of the airplane

Find moment of inertia of solid cylinder through an axis which passes through middle of its width

A boomerang is thrown with the following
displacements: 4.5 m, E, 7.5 m, 30 degrees N of
W, and 3.0 m at 10 degrees S of W. What is the
resultant displacement?

A stone is thrown with an initial velocity of 55 ft/
s, at an angle of 23° with the horizontal. Find the
vertical and horizontal components of the velocity

A car of mass 100 kg starts moving on a horizontal road from a point o take the horizontal plane containing o as reference level for gravitational potential energy g=10m/s^2 the car reaches point A with speed 72km/hr calculate the mechanical energy

Write maxium height in projectile motion.

A cyclist start a journey with rest with 5m/s for 5sec find travelling distance.

An angular momentum of a fly wheel having a momentum of inertia of 0.125kgm^2 decreases form 3.0kgm^2/s to 2.0kgm^2/s in a period of 1.5secs.
(i) what is the average torque acting on the fly wheel during this period.
(ii) assuming a uniform angular acceleration, through how many revolution will the fly wheel have turned?

A fly wheel of inertia 0.32kgm^2 is rotated steadily at 120rad/s by a 50watt electric motor. Calculate the kinetic energy of the fly wheel and the angular momentum of the fly wheel.