Applied Mechanics And Graphic Statics - Study Mode

[#301] A cube on a smooth horizontal surface
Correct Answer

(D) Can be in any of these states

[#302] The mechanical advantage of an ideal machine is 100. For moving the local through 2 m, the effort moves through
Correct Answer

(A) 0.02 m

[#303] The rate of change of displacement of a body with respect to its surrounding, is known
Correct Answer

(A) Velocity

Explanation

Solution: Displacement refers to the change in position of a body in a particular direction. The rate of change of displacement with respect to time is defined as velocity . Velocity is a vector quantity , meaning it has both magnitude and direction. In contrast, speed is the rate of change of distance (not displacement) and is a scalar quantity . Acceleration is the rate of change of velocity, not displacement. Therefore, the correct term for the rate of change of displacement is Velocity.

[#304] A train weighing 196 tonnes experiences a frictional resistance of $$5frac{{11}}{{22}}$$ xa0per tonne. The speed of the train at the top of a down gradient 1 in 78.4 is 36 km/hour. The speed of the train after running 1 km down the slope, is
Correct Answer

(A) $$5sqrt {10} { ext{ m/sec}}$$

[#305] A trolley wire weighs 1 kg per metre length. The ends of the wire are attached to two poles 20 m apart. If the horizontal tension is 1000 kg, the central dip of the cable is
Correct Answer

(D) 5 cm