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Solution 8.1a
From Mechanics
In this case we have
u=4i
and
a=0.9i+0.7j
Substituting these into the equation
v=u+at
gives the velocity of the ball at time t=10 s as:
v=4i+(0.9i+0.7j)
10
which gives
v=13i+9j ms-1
