Acar travelled 16km north and then 20 km east. the total time of travel is 0.75 hr. find the average speed and average velocity for the trip.

Average speed of the car is 48 km/hour.

Average velocity of the car is 34.15 km/hour in north east direction.

Explanation:

Total distance traveled by car = 16 km + 20 km = 36 km

Total time taken by car = 0.75 hour

Average speed of the car =

Average speed of the car is 48 km/hour.

A car traveled 16 km north and then 20 km east .The displacement of the car can be calculated by :

From figure given:

AB = 16 km

BC = 20 km

AC = Displacement

Average velocity of the car =

in north east direction.

Average velocity of the car is 34.15 km/hour in north east direction.

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2