The velocity y of a particle in a time t is giv... - JAMB Physics 2000 Question
The velocity y of a particle in a time t is given by the equation
y = 10 + 2t2
Find the instantaneous acceleration after 5 seconds
A
60 ms-2
B
20 ms-2
C
15 ms-2
D
10 ms-2
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Correct Option: B
The velocity V = 10 + 2t2
But acceleration, a = dv/dt
thus if V = 10 + 2t2
dv/dt = 4t
And t = 5s then a = 4x5 = 20m/s2
∴a = 20ms
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