A racing car accelerates on a straight line from rest to a speed of 50 m s in 25 s Assuming uniform ...........

General Science (NDA) Physics

A racing car accelerates on a straight line from rest to a speed of 50 m/s in 25 s. Assuming uniform acceleration of the throughout, the distance covered in this will be

625 m

1250 m

2500 m

50 m

Explanation:

Acceleration of the car is uniform. Therefore, according to first equation of motion v = u + at
where, v = final velocity of the car = 50 m/s
a = acceleration of the car
t = time interval = 25 s
u = initial velocity = 0
50 = 0 + a × 25 => a = 2 m/ s²

Now, applying second equation of motion we get,
s = ut + 1/2at²
=1/2 x 2 x 25 x 25= 625m