Homework Help: Physics

Posted by carak on Tuesday, July 24, 2012 at 2:19pm.

starting from ypur house, run 2oom east at an average speed of 4m/s, then turn around and run 280m west at an average spped of 7m/s to a post.
1) calculate Average velocity from house to post

Physics - Elena, Wednesday, July 25, 2012 at 5:19am
Average velocity=final displacement/total time taken
Final displacement = 280-200 = 80 m,
t1=s1/v1=200/4=50 s,
t2=s2/v2 = 280/7 =40 s.
total time =50+40 =90 s.
Average velocity = 80/90=0.89 m/s.

Note!
Average speed=total distance travelled/ total time taken=(200+280)/90=5.33 m/s

Answer this Question

Related Questions

Physics - starting from your house, run 2oom east at an average speed of 4m/s, ...
PHYSICS - Starting from a pillar, you run a distance 200 m east (the + x-...
Physics - It takes you 13.5 minutes to run 8 full laps around a 400m track. Find...
physics 111 - A runner times his speed around a circular track with a ...
physics - a runner run halfway around a circular track whose radius is 60 meters...
physics - Two beetles run across flat sand, starting at the same point. Beetle 1...
Microeconomics help please (urgent) - True or False? Explain your reasoning. a...
Physics - A car races at a constant speed of 25 m/s around a circular track with...
physics - a boy is running on a straight road.He run towards north in 2 minutes ...
physics - A train moving at a constant speed of 68.0 km/h moves east for 33.0 ...

For Further Reading

First Name:
School Subject:
Answer: