Question

question 25 of 25 a skydiver slows down from 65 m/s to 5 m/s by opening the parachute. if this takes 0.75 seconds, what is the skydivers acceleration? a. 45 m/s2 down b. 80 m/s2 down c. 45 m/s2 up d. 80 m/s2 up

Explanation:

Step1: Identify variables

\( v_i = 65 \, \text{m/s}, v_f = 5 \, \text{m/s}, t = 0.75 \, \text{s} \)

Step2: Calculate acceleration

\( a = \frac{v_f - v_i}{t} = \frac{5 - 65}{0.75} = -80 \, \text{m/s}^2 \)

Step3: Determine direction

Negative sign means acceleration opposite to motion (up).

Answer:

D. 80 m/s² up