Question

1. If a man ran at 1 m/s for 10 s and then -1 m/s for 10 s more. Show calculations. 10 pts

What would be the total distance he traveled? ______________ m

What would be his average speed? ______________ m/s

What was his displacement at the end of his trip? ______________ m

What was his average velocity? ______________ m/s and direction ____________

Answer 1

1)

Total distance travelled = 10*1 + |10*(-1)|

= 10 + 10

= 20 m <<<<<<<<<-----------------------Answer

his average speed = total distance travelled/total time taken

= 20/20

= 1 m/s <<<<<<<<<-----------------------Answer

his displacement = 10*1 + 10*(-1)

= 0 m <<<<<<<<<-----------------------Answer

his average velocity = total displacement/total time taken

= 0/20

= 0 m/s <<<<<<<<<-----------------------Answer

Note : distance travelled is always positive. but displacement can be positove or negative.