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Question

A particle moves in the xy plane with only an x-component of acceleration of 2ms2. The particle starts from the origin at t=0 with an initial velocity having an x-component of 8ms1 and y-component of 15 ms1. Velocity of particle after time t is :

A
[(8+2t)^i15^j] ms1
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B
Zero
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C
2t^i+15^j
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D
Directed along z-axis
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Solution

The correct option is A [(8+2t)^i15^j] ms1
Acceleration only affects x component.
Using the equation of motion.
v=u+at.
vx=8+2t
Hence velocity is given by:
V=((8+2t)i15j)ms1
Hence option A is correct.

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