Question

kirsten is travelling 6.5( m)/(s) when she applies her brakes to avoid a patch of loose gravel. she accelerates at a rate of -2.6( m)/(s). How much time does it take her to stop?

Answer 1

Kirsten takes 2.5 seconds to stop.

Step-by-step explanation:

To find the time it takes for Kirsten to stop, we can use the equation:

vf = vi + at

Where:

• vf is the final velocity, which is 0 m/s in this case because Kirsten stops
• vi is the initial velocity, which is 6.5 m/s
• a is the acceleration, which is -2.6 m/s^2 (negative because it is a deceleration)
• t is the time we want to find

Substituting the values into the equation, we have:

0 = 6.5 - 2.6t

Simplifying the equation gives:

t = 6.5 / 2.6

t = 2.5 seconds

Therefore, it takes Kirsten 2.5 seconds to stop.