Question

2) The intial velocity of an object is - 5i^ +10j^ m/s. Its constant acceleration is a = 2i + 3j m/s². Determine the velocity and the displacement after 5 s​

Answer 1

Answer:

Initial velocity of the sphere u=2

i

^

+2

j

^

As the wall is parallel to y axis, thus its velocity componant in y direction remains the same i.e 2

j

^

but its velocity componant in x direction changes.

Newtons law of collision in x direction :

v−0

−v

′

−0

=−e

2

i

^

−0

v

′

−0

=−

2

1

⟹v

′

=−

i

^

⟹ Velocity vector of sphere after hitting the wall u

′

=−

i

^

+2

j

^

solution

Answer 2

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