Engineering Mechanics - Mechanical Engineering MCQ

A uniform metal chain is placed on a rough table such that one end of chain hangs down over the edge of the table. When one third of its length of hangs over the edge, the chain starts sliding. Then, the coefficient of static friction is:-

A box is lying on an inclined plane. What is the coefficient of static friction if the box starts sliding when an angle of inclination is 60^o?

A block of mass m is placed on a surface with a vertical cross section given by   If
coefficient of friction is 0.5, the maximum height above the ground at which the block can be placed without slipping is :-

Common data for 11 & 12

Force in member EA is:-

Force in member DE is:-

Consider the truss shown below :-

force in member BE is:-

Determine the force in the member DE shown below (P₁ = P₂ = 4kN) :-

Which are the zero force members in the truss shown below:-

In a toggle joint shown in figure, find out horizontal force P. Vertical force at joint C is 5 N. Length of links are 3 m and 5 m.

A weight 'W' is supported by two cables as shown in the figure below. The tension in
the cable making an angle e will be the minimum when the value of 9 is

Find out force ‘F’ required to pull the weight of 5 N using the pulley as shown in the figure.

Common Data Questions 17-18

In a carnival ride, the passengers sit on a seat that rotates with constant speed in a vertical circle of radius 2 m. The heads of the seated passenger always pointed towards the axis of rotation and the carnival ride completes one full circle in 2 seconds.

Q. Find the acceleration of passenger

In a carnival ride, the passengers sit on a seat that rotates with constant speed in a vertical circle of radius 2 m. The heads of the seated passenger always pointed towards the axis of rotation and the carnival ride completes one full circle in 2 seconds.

Find the slowest rate of rotation if the seat belt is to exert no force on the passenger at the top of ride.

A ladder of mass 10 kg leans against a larger smooth sphere of radius 5 m which is fixed on a horizontal surface. The ladder makes an angle 60° with horizontal and having length 12.5 m

What is the force that the sphere exerts on ladder?

A body of weight 64N is pushed with just enough force to start it moving across a horizontal floor and the same force continues to act afterwards. If the coefficients of static and dynamic friction are 0.6 and 0.4 respectively, the acceleration of the body will be  (g=10m/s²):-

The coefficient of friction between body and surface of an inclined plane at 45º is 0.5.If g = 9.8m/s², the acceleration of body downwards in m/s² is:-?