Question

A skier starts down a slope 0.250 km long at a velocity of 4.0 m/s [downhill]. If she accelerates at a

constant rate of 2.0 m/s² [downhill], find her velocity at the bottom of the slope. (31 m/s [downhill])

Answer 1

32 m/s downhill

Step-by-step explanation:

Take downhill to be positive. Given:

s = 0.250 km = 250 m

u = 4.0 m/s

a = 2.0 m/s²

Find: v

v² = u² + 2as

v² = (4.0)² + 2 (2.0) (250)

v² = 1016

v = 31.9

Rounded to 2 significant figures, the skier's final velocity is 32 m/s downhill.