Ask a Question

A person swims 100 m in the first 40 s, 80 m in the next 40 s and 45 m in the last 20 s. What is the average speed?

0 votes
251 views
in Chapter 1 Laws of Motion by (98.9k points)
edited
A person swims 100 m in the first 40 s, 80 m in the next 40 s and 45 m in the last 20 s. What is the average speed?

1 Answer

+1 vote
by (172 points)
selected by
 
Best answer

formula for velocity is given as;

\(v=x/t\)

therefore,

v1=x1/t1=100m/40sec=2.5m/s.

v2=x2/t2=80m/40sec=2m/s

v3=x3/t3=45m/20sec=2.25m/s

\(Vavg={V1+V2+V3\over3}\).=2.25m/s

by (98.9k points)
edited
Thank You Saifali Shaikh

Related questions

Doubtly is an online community for engineering students, offering:

  • Free viva questions PDFs
  • Previous year question papers (PYQs)
  • Academic doubt solutions
  • Expert-guided solutions

Get the pro version for free by logging in!

Most popular tags

jeemain geography-10th engineering physics semester 5 web computing

5.7k questions

5.1k answers

108 comments

557 users

Doubtly
...