Question

physical science : Find the speed of an object that covers 400 km in 5 hr.
a. 40 km/hr
b. 80 km/hr
c. 2000 km/hr
d. 800 km/hr

Answer 1

The answer would be 80km/hr because
400/5=80

Answer 2

so the answer would be b?

Answer 3

\[Speed=\frac{distance}{time} = \frac{400}{5} = 80 km/hr\]

Answer 4

b

Answer 5

k thx!! what about this 1?

Answer 6

What is the acceleration of an object that takes 20 sec to change
from a speed of 200m/sec to 300 m/sec?
a. 5 m/sec.
b. 5 m/sec/sec.
c. 100 m/sec.
d. 100 m/ sec/sec.

Answer 7

a