A drag racer starts from rest and accelerates at 10 m/s² for the entire distance of 400 m (1/4 mile).What is the velocity of the race car at the end of the run? A)45 m/s B)89 m/s C)130 m/s D)180 m/s

Question

Quizplus · Accepted Answer

We can use the equation of motion:

v^2 = u^2 + 2as

where, 
u = 0 (starting from rest) 
a = 10 m/s^2 (acceleration) 
s = 400 m

Substituting the values:

v^2 = 0 + 2(10)(400) 
v^2 = 8000 
v = √8000 
v ≈ 89 m/s

Therefore, the velocity of the race car at the end of the run is 89 m/s.

A Drag Racer Starts from Rest and Accelerates at 10