Physical Quantity | MCQs

Explanation

r is inversely proportional to p³, so r = k/p³.

Given p = 9 and r = 2:

2 = k/729

k = 2 × 729 = 1458

Now, r = 1/4:

1/4 = 1458/p³

p³ = 1458 × 4 = 5832

p = 18

Explanation

A magnitude that has zero magnitude is called a zero vector or null vector.

This type of vector has a magnitude of zero, and its direction is considered arbitrary or indeterminate. 

Explanation

Work done is equal to Effort x distance.

This is represented mathematically as 

W=F⋅d, where W is work, F is the force (or effort), and d is the distance over which the force is applied.