Question

D) When distance is fixed velocity is doubled then time become (a) halved (b) doubled (c) unchanged (d) tripled​

Answer 1

Answer:

a) halved

Step-by-step explanation:

s=$\frac{d}{t}$

t=$\frac{d}{s}$

if velocity is doubled

t=$\frac{d}{2s}$

comparing this with original equation, we see that time is halved

Answer 2

Answer: (a) halved.

Explanation:

We know,

t = s/v

=> t ∝ 1/v

Therefore, when velocity is doubled, the time becomes 1/2.

ALITER:

Or, we know,

s = vt

=> t = s/v ___(A)

Let, new time = t′

ATQ, t′ = s/2v => t/2 (from A)

=> t′ = t/2.

Therefore, new time is half of the former time.