Question

Guys, Plz answer 2 Questions with proper explanation...​

Answer 1

Explanation:

$\huge\sf\underline\red{answer}$

7) given,

mass of you 'm'= 50kg

speed of train 'v' = 108km/h

= 108×5/18mls [.: 1km/h = 5/18m/s]

= 6×5m/s

= 30m/s

Option A:

as you are waiting for your friends since, you are in rest so your kinetic energy is zero.

.: OPTION A IS CORRECT.

OPTION B:

as your friends are in train , it will appear for them you are moving

.: velocity of train = velocity of you = 30m/s

mass of you = 50kg

K.E = 1/2mv²

= 1/2×50×(30)²

= 25×900 J

= 22500 J

.: OPTION B IS CORRECT

OPTION C:

as option b is correct it is wrong

Answer 2

7) given,

mass of you 'm'= 50kg

speed of train 'v' = 108km/h

= 108×5/18mls [.: 1km/h = 5/18m/s]

= 6×5m/s

= 30m/s

Option A:

as you are waiting for your friends since, you are in rest so your kinetic energy is zero.

.: OPTION A IS CORRECT.

OPTION B:

as your friends are in train , it will appear for them you are moving

.: velocity of train = velocity of you = 30m/s

mass of you = 50kg

K.E = 1/2mv²

= 1/2×50×(30)²

= 25×900 J

= 22500 J

.: OPTION B IS CORRECT

OPTION C:

as option b is correct it is wrong

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