Engineering-mechanics Questions Set 26:
What is the SI unit of power?
Solution:
Calculate the work done to lift an object of mass 10 kg to a height of 20 m. (g = 9.8 m/s²)
Solution:
Which of the following is a type of normal stress?
Solution:
In an internal combustion engine, during the expansion stroke, the work done by the gases on the piston will be:
Solution:
If the horizontal range is equal to 4 times the maximum height, what is the angle of projection for a bullet fired over a horizontal plane?
Solution:
A bicyclist comes to a skidding stop in 10 m. During this process, the force on the bicycle due to the road is 200 N and is directly opposed to the motion. The work done by the road on the bicycle is:
Solution:
Two bodies of the same mass are moving towards each other with velocities of 5 m/s and 12 m/s. They collide with each other, and after the collision, their velocities are 9 m/s and 8 m/s. The coefficient of restitution is:
Solution:
A block is on a surface, weighing 200 N. The coefficient of static and kinetic friction for the surface is 0.4 and 0.2, respectively. Suppose the block is acted upon by a horizontal force, given by P (force in Newtons) = 10*t, where t is in seconds. Find the velocity (in m/s) of the block after 10 seconds.
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When a car is moving forward, what is the direction of the moment (torque) caused by the rotation of the tires?
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A rigid member ACB is shown in the figure. The member is supported at A and B by pinned and guided roller supports, respectively. A force P acts at C as shown. Let RAh and RBh be the horizontal reactions at supports A and B, respectively and RAv be the vertical reaction at support A. Self-weight of the member may be ignored.
Which one of the following sets gives the correct magnitudes of RAv, RBh and RAh?
Solution:
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