Question

How much time does it take a skater to increase her speed uniformly, from 3.0 meters per second to 7.0 meters

per second, over a distance of 10 meters?
a. 1.0 S
b. 4.0 s
C 6.0 s
d. 2.0 s

Answer 1

d. 2.0 s

Step-by-step explanation:

Given:

v₀ = 3.0 m/s

v = 7.0 m/s

Δx = 10 m

Find: t

Δx = ½ (v + v₀) t

(10 m) = ½ (7.0 m/s + 3.0 m/s) t

t = 2.0 s