Free Body Diagram

A helicopter is moving to the right at a constant horizontal velocity. It experiences thre forces vecF_("gravitational"), vecF_("drag") force on it caused by rotor vecF_("rotor") . Which of the following diagrams can be a correct free body diagram represents forces on the helicopter?

A small elecrtrically charged sphere is suspended vertically from a thread. An oppositely charged rod is brought close to the sphere such that the sphere is the sphere is in equlibrium displaced from the vertical by an angle of 30^(@). When one of the following best represents the free body diagram for the sphere?

The figure shows two blocks of mass m_(1) and m_(2) placed one above the other. These is no friction between the lower block and ground. The lower block is being pushed by a constant horizontal force F. There is sufficient friction between the blocks so that they do not slip over each other. Draw the free body diagram of the upper block in the frame of groung and in the frame of lower block. Find the work done by various forces on the upper block in the two frames as the arrangement moves through 'S'

Blocks A, B and C are placed as shown in Fig and connected by the rops of negligible mass . Both A and B weigh 25.0 N each , and the coefficient of kinetic friction between each and the surface is 0.35 blocks C descends with constant velocity . a. Draw two separate free- body diagrams showing the forces acting on A and B b. Find the tension in the rope connecting blocks A and B c. What is the weight of blocks C? d. If the rope connecting A and B were cut, what would be the acceleration of C?

A man of mass M stands on a weighing machine in an elevator accelerating upwards with an acceleration a. Draw the free-body diagram of the man as observed by the observer A (stationary on the ground) and observer B (stationary on the elevator). Also, calculate the reading of the weighing machine.

A right-angled triangular block of mass M rests on a horizontal table . The inclination of the block is 30^(@) with the table . A cubical block of mass m is placed on the incline of the block . What horizontal force must be applied on M so that m may remain stationery relative to the block ? [Hint: Apply d' Alember's principal and consider free-body diagrams of m and the system ( m+ M).]

A plane surface, incline at 37^(@) to the horizontal is accelerated horizontally till a block of mass m originally at rest with respect to the plane, just starts to slip up the plane. The coefficient of static friction between surfaces in contact is mu = (5)/(9) Find the acceleratiobn of the plane [Hint : Applying D' Alembert's principle bring the system to rest. Make free-body diagram adn apply second law of motion]

A hot- air balloon consists of a basket, one passenger, and some carge. Let the total mass be M. Even though there is an upward lift force on the balloon, the balloon is initially acceleration downwards at a rate of g//3 . (a) Draw a free-body diagram for the descending balloon. (b) Find the upward lift force in terms of the initial total weight Mg. (c ) The passenger notices that he is heading straight for a waterfall and decides he needs to go up. What fraction of the total weight must he drop overboard so that the balloon accelerates upward at a rate of g//2 ? Assume that the upward lift force remains the same.