Question

If the velocity of the object 0 m/s 10 m/s, 20 m/s, 30 m/s and 40 m/s at Os, 1 s. 2s .3s and 4
respectively then the average velocity of the object is​

Answer 1

Explanation:

average velocity= total velocity / total time

= 0+10+20+30+40/0+1+2+3+4

=100/10

= 10 m/ s

Answer 2

Answer:

Force = mass × acceleration

F=10N

m=2kg

then,

a=mF=210=5m/s2

(i) Now, 

u=0

t=3sec

v=u+at=0+3×5=15m/s

(ii)Initialmomentum=mu=2×0=0

       Finalmomentum=mv=2×15=30kg−m/s

Change in momentum=Final momentum - Initial momentum 

                                    =30−0=30kg−m/s