Numerical - Initial velocity of an object along a straight line

Q.  What is the initial velocity of an object which travels a distance of 10t2 +15t + 5 along a straight line in time t?
- Published on 18 Sep 15

a. -10
b. +10
c. -15
d. +15

ANSWER: +15

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    Discussion

  • Sravanthi   -Posted on 15 Dec 15
    Solution:

    Given: Distance traveled (d) = 10t2 +15t + 5

    Therefore,

    (ds/dt) = velocity = 20 t + 15

    Initially, t is zero,

    velocity = 20 t + 15

    Initially velocity of an object = 15

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