Question

An antelope trots through the grasslands at a velocity of 2 m/s. Suddenly, a lion begins to chase the antelope. If the antelope accelerates at a rate of 4 m/s2, what is the antelope's final velocity after 7 seconds? Assume that the antelope moves in only one direction. A. -26 m/s B. 26 m/s C. 56 m/s D. 30 m/s

Answer 1

v₀ = initial velocity antelope through the grasslands = 2 m/s

a = acceleration of the antelope = 4 m/s²

t = time for which the antelope accelerate = 7 seconds

v = final velocity of antelope = ?

using the kinematics equation

v = v₀ + a t

inserting the above values in the above equation

v = 2 + (4) (7)

v = 2 + 28

v = 30 m/s

hence the correct choice comes out to be

D. 30 m/s