Question

A car is traveling at a speed of 80 ft/s when the brakes are suddenly applied, causing a constant deceleration of 10 ft/s2. Determine the time required to stop the car and the distance traveled before stopping.

Answer 1

Answer:

Time taken = 8 second

Distance traveled = 320 ft

Explanation:

Given:

Initial velocity (u) = 80 ft/s

Acceleration (a) = (-)10 ft/s²

Final velocity (v) = 0 ft/s

Find:

Time taken

Distance traveled

Computation:

v = u + at

0 = 80 + (-10)(t)

t = 8 second

Time taken = 8 second

s = ut + (1/2)(a)(t)²

s = (80)(8) + (1/2)(-10)(8)²

s = 320 ft

Distance traveled = 320 ft