Mechanics | Relativity Answers

the moment of inertia of a uniform,rod of length 2l and mass m about an axis xx passing through its centre and inclined at an angle is

(b) A plane is flying with a constant speed along a straight line at an angle of 30° with the horizontal.
The weight of the plane is 80, 000 N and its engine provides a thrust of 100, 000 N in the
direction of flight. Two additional forces are exerted on the plane: the lift force perpendicular to
the plane’s wings, and the force due to air resistance opposite to the direction of motion. Draw
the free-body diagram showing all forces on the plane. Determine the lift force and the force due
to air resistance.
2. A bus is moving downhill at a slope of 5° on a rainy day. At the moment when the speed of the bus is
30 km h−1,the driver spots a deer 30 m ahead. He applies the brakes and comes to a stop. The deer is
paralyzed by fear and does not move. Will the bus stop

a 20kg wagon is pulled along a level ground by a rope inclined at 30 degrees above the horizontal.a friction force of 30 newtons opposes the motion.how large is the pulling force of the wagon is movin at constant speed

What do you understand by the term inertial force? Do inertial forces arise in inertial frames?
Explain. Derive the expression for the inertial force exerted on an accelerating object in
translational motion in the non-inertial frame attached to it.

A 10 g ball falls vertically on a surface at a speed of 5m/s and rebounds with the same speed. The ball remains in contact with the surface for 0.01 sec.Then what will be the average force exerted by the surface on the ball?

What will be the weight of the 10 x 10 x 20 cm wooden box (density 2 g/ml) in the water?

A hollow cylinder of radius 10 cm rotates about its axis which is vertical. A small body remains in contact with the inner wall if the frequency of rotation is 200 per minute but falls at lower frequencies. Find the co-efficient of friction between the body and the cylinde

a rocket is traveling at 10km/s. how long does it take rocket to travel 30km?
Give me answer in full details!

a heavy plank is moving with horizontal acceleration a=2 in S I units towards left.A hollow cylinder of mass m=3kg and radius 25cm is on upper surface of plank and moves without slipping find it angular acceleration [about axis in rad per second square ] of hollow cylinder?

two cars 200 kilometers apart are moving toward each other;each one is going at a speed of 50 km/h. a large wasp starting on the front of one of them flies back and forth between them at a rate of 75 km/h.it does this until the cars collide and crash the large wasp.what is the total distance the large wasp has flown?