Question
Wed June 22, 2011 By: Fathima M

numerical question

Expert Reply
Wed June 22, 2011
Given that
x=4t2-15t+25
 
velocity, v = dx/dt = 8t - 15
 
acceleration, a = d2x/dt2 = 8
 
At time, t = 0, position, x = 25 units
                     velocity, v = - 15 units
                    acceleration, a = 8 units
For the velocity to be zero,
 
v = 8t - 15 = 0
 
t = 15/8 = 1.9 s 
 
The motion of the particle has uniform acceleration because it does not change with time.
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