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2 years ago

11

A delivery man is told to go 60 miles per hour north to make his delivery on time. These instructions describe the delivery man'

s
-speed
-velocity
-acceleration
-magnitude

2 answers:

sergeinik [125]2 years ago

5 0

Velocity here because it's speed and direction

Nonamiya [84]2 years ago

4 0

Answer:

Speed

Explanation:

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An object is placed to the left of a convex mirror, such that the object-to-image distance is 140 cm.

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Answer:

The focal length of the mirror is 52.5 cm.

Explanation:

Given that,

Object to Image distance d = 140 cm

Image distance v= 35 cm

We need to calculate the object distance

$u = d-v$

$u = 140-35=105\ cm$

We need to calculate the focal length

Using formula of mirror

$\dfrac{1}{f}=\dfrac{1}{u}+\dfrac{1}{v}$

Put the value into the formula

$\dfrac{1}{f}=\dfrac{1}{-105}+\dfrac{1}{35}$

$\dfrac{1}{f}=\dfrac{2}{105}$

$f=52.5\ cm$

Hence, The focal length of the mirror is 52.5 cm.

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