Question

Solve this correctly

Answer 1

1.

i. (c) Accelerstion

ii.(a)kg.m/s

iii.(c) isolated system

iv.(a) conserved

v.(b) opposes

vi.(a) force of limiting friction

vii.(d) all the above

viii.(b)smaller

ix. (a)reduces

x.(b)increases

2.

from newton's 2and law of motion we know that force is equal to change in momentum per unit time

OR, force is directly proportional to rate of change of momentum

let the mass of the body be= m

let the initial velocity of a body be= u,

final velocity be= v

time taken =t

initial momentum =mu

final momentum =mv

thus, rate of change of momentum = mv-mu/t

=m(v-u)/t

= ma (v-u/t=a)

(where a=acceleration)

thus F=ma

Answer 2

Answer:

1) acceleration

2)kgms^-1

3) non uniform system

4) conserved

5) opposes

6) force of limiting friction

7)all of these

8) smaller

9) reduce

10) increase

hope it's helpful

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