Physics - Study Mode

[#536] A single fixed pulley is used to draw water from a well because
Correct Answer

(D) Force is applied in a convenient direction

Explanation

Solution: A single fixed pulley is used to draw a bucket of water from a well. It is easy to draw from a well using a pulley because it helps in changing the direction of the force applied. This, in turn, makes it easy to move the object. In this case, the pulley helps in lifting the bucket full of water upwards.

[#537] A fixture is defined as a device which
Correct Answer

(B) Holds and locates a workpiece and guides and controls one or more cutting tools

Explanation

Solution: A fixture is a work-holding or support device used in the manufacturing industry. Fixtures are used to securely locate (position in a specific location or orientation) and support the work, ensuring that all parts produced using the fixture will maintain conformity and interchangeability.

[#538] What type of simple machine is an axe?
Correct Answer

(C) Both A & B

Explanation

Solution: The axe head and the doorstop are both examples of a wedge, a type of simple machine. It also acts as a type of lever.

[#539] While ascending a hill, the driver of the vehicle keeps the gear ratio
Correct Answer

(D) Either equal to or greater than 1

Explanation

Solution: While ascending a hill Gear Ratio should be “Either equal to or greater than 1. Gear Ratio is the ratio between angular velocity of input gear to the angular velocity of output gear. It prevents the vehicle from stalling.

[#540] The size of gear is usually specified by
Correct Answer

(A) Pitch circle diameter

Explanation

Solution: The size of the gear is usually specified by the pitch circle diameter. It is also called as pitch diameter.