May I please get some help?
A unicorn running on a beach at 8 m/s changes speed at a constant rate of 2.7 m/s2 over a period of 2 seconds. What is the unicorn's velocity at the end of this time?
- oldprofLv 73 months agoFavorite Answer
The physics is simple. The end speed = initial speed + increase in speed over time = U + aT = 8 + 2.7*2 = 13.4 m/s ANS.
- 3 months ago
V_f = V_i + a*t
V_f = 8 + 2.7*2
V_f = 13.4m/s
- oubaasLv 73 months ago
final speed Vf = Vi+a*t = 8+2.7*2 = 13.4 m/sec
distance d = Vi*t+a/2*t^2 = 8*2+1.35*2^2 = 16+5.4 = 21.4 m
- Andrew SmithLv 73 months ago
never confuse speed and velocity. Velocity can alter even when speed does not. The SPEED of the unicorn would be either 8+2.7*2 = 13.4 m/s or 8 - 2.7 *2 = 2.6 m/s Depending on the direction of the change. We cannot know what the change in the velocity is without more information.
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- Anonymous3 months ago
Trick question, Unicorns don't exist.