21. A body of mass 10 g is acted on by a force of 20 Dyne. The magnitude of acceleration will bea) 4 cm/s2 b) 2 cm/s2
c) 6 cm/s2 d) 10 cm/s2
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Answer:
Correct option is
B
100 kg-m/s
F=10N,m=20kg,t=10s
a=
m
F
=
20
10
=0.5m/s
2
v=u+at=0+0.5×10=5m/s
Change in momentum =m(v−u)=20(5−0)=100kgm/s
Answer:
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