Question

The position of an object is given by: 2t^2 + 3t + 4 (units in m). What is the velocity after three seconds?

Question 1 options:
a. 0 m/s
b. 4 m/s
c. 15 m/s
d. 31 m/s
e. 43.5 m/s

Answer 1

Step-by-step explanation:

x=2t^2 + 3t + 4

v=dx/dt=4t+3

v at t=3 sec, =>4(3)+3=15ms^-1