# AS PhysicsWatch

#1
This is a question from edexcel may 2009. I don't know how to answer it.

When asked to run one complete lap around a track, a student says, "However fast I run, My average velocity got the lap will bro zero."
Comment on his statement.

0
4 years ago
#2
Comment on this statement: It doesn't make sense
1
4 years ago
#3
This is a question from edexcel may 2009. I don't know how to answer it.

When asked to run one complete lap around a track, a student says, "However fast I run, My average velocity got the lap will bro zero."
Comment on his statement.

He is moving in a circle, or similar shaped thing.

He ends up where he started to although he has moved in distance, his average velocity (speed of something in a given direction) is zero because he hasn't moved. That is the difference between velocity and speed.

If he does a 10km lam in 60 minutes, he ran at an average SPEED of 10km/h but if he arrived where he started, his average velocity is zero, since he goes in two different directions they cancel out.

Hope this helps
0
4 years ago
#4
Velocity is a vector, and therefore has direction. Therefore the equation for velocity is velocity = DISPLACEMENT / time. Therefore, as he is running around a track, completing one lap causes his displacement to be zero, thereby causing his average velocity to always equal zero.

Hope this helps
0
#5
Thank you guys that really helped
0
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