Acar moves in a straight line at 16.0 m/s for 8.0 miles, then at 30.0 m/s for another 8.0 miles.
(a)
is the car's average speed less than, greater than, or equal to 23.0 m/s?
less than 23.0 m/s
equal to 23.0 m/s
greater than 23.0 m/s
(b)
calculate the car's average speed in meters/second. (enter your answer to three significant figures.)
/s

a)The car's average speed less than 23.0 m/s.

b) The car's average speed is 20.9 m/s.

Explanation:

a) A car moves in a straight line at 16.0 m/s for 8.0 miles.

Distance covered =

1 mile = 1609.34 m

Time taken by the car to cover 8 mile distance =

Speed of the car =

After this car moves in a straight line at 30.0 m/s for 8.0 miles.

Distance covered =

Time taken by the car to cover further 8 mile distance =

Speed of the car =

Average speed =

=

Average speed of the car is 20.87 m/s which is less than 23.0 m/s speed.

b)The car's average speed =  20.87 m/s ≈ 20.9 m/s

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr