What is the final velocity of a car that accelerates at a rate of 10 meters/second^2 for 7 seconds?
A) 20 meters/second
B) 50 meters/second
C) 70 meters/second
D) 90 meters/second
E) 100 meters/second
To find the final velocity of a car, we can use the formula:
final velocity (v) = initial velocity (u) + (acceleration (a) × time (t))
Given:
acceleration (a) = 10 meters/second^2
time (t) = 7 seconds
Since the car initially starts from rest (u = 0), we can substitute these values into the formula:
v = 0 + (10 meters/second^2 × 7 seconds)
v = 0 + 70 meters/second
Therefore, the final velocity of the car is 70 meters/second.
So the correct answer is C) 70 meters/second.