A 750 kg car zooms away from a red light with an acceleration of 7.8 m/s2. What is the average net force in Newtons that the car experiences?

5850N

Explanation:

Given parameters:

Mass of the car  = 750kg

Acceleration = 7.8m/s²

Unknown:

Net force  = ?

Solution:

According to Newton's second law of motion;

  Force  = mass x acceleration

To find the net force input the given parameters:

   Net force on the car  = 750 x 7.8  = 5850N

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

compass can be used day and night, cloudy or sunny