Physics - Study Mode

[#541] Which of the following is a compound machine?
Correct Answer

(C) Bicycle

Explanation

Solution: Bicycle is an example of compound machine. A compound machine is a combination of two or more simple machines.

[#542] Which of the following is an example for cantilever beam?
Correct Answer

(B) Bridge

Explanation

Solution: A cantilever is a beam anchored at only one end. The beam carries the load to the support where it is resisted by moment and shear stress. Cantilever construction allows for overhanging structures without external bracing. Cantilevers can also be constructed with trusses or slabs. This is in contrast to a simply supported beam such as those found in a post and lintel system. A simply supported beam is supported at both ends with loads applied between the supports. Cantilevers are widely found in construction, notably in cantilever bridges.

[#543] A machine powered by rotating blades is a
Correct Answer

(B) Turbines

Explanation

Solution: A machine powered by rotating blades is a turbines. A turbine is a device that harnesses the kinetic energy of some fluid - such as water, steam, air, or combustion gases - and turns this into the rotational motion of the device itself.[2] These devices are generally used in electrical generation, engines, and propulsion systems and are classified as a type of engine.

[#544] Second and third class levers are differentiated by
Correct Answer

(A) The location of the load

Explanation

Solution: Second and third class levers are differentiated by the location of the load.

[#545] The Law of Kepler is related with which among the following ?
Correct Answer

(A) Planetary Motion

Explanation

Solution: The Law of Kepler is related with planetary motion.