Claire starts driving with an initial velocity of 5.0 m/s towards north. She drives along a straight, level path with a uniform acceleration and travels 500. m in 20. seconds. A. What is the average velocity for the entire 20. seconds? B. What is the velocity at the end of 20. seconds?

Question

27 March, 10:03

+2

Answers (2)

Know the Answer?

Skyler Randall · Answer 1

S=ut+1/2at^2

500m = (5m/s*20s) + 1/2 (a*20^2)

500-100=1/2 (a*400)

800=a*400

a=800/400

a=2m/s^2

v=u+at

v=5+2*20

v=5+40

v=45m/s

Gonzalez · Answer 2

A) avg velocity = (v+u) / t

= (500/20 + 5) / 20

=3/2m/s

b) v=u + at

=5 + (25-5) / 20 * 20

=25m/s