Francisco and Ethan were pushing a car down the road. The force exerted was an equal amount from each person. The total force exerted on the car 600 newtons. The car did not move. What was the amount of force exerted by the car on each person? a.300 Newtons
b.0 Newtons
c.6000 Newtons
d.1200 Newtons

Estimate the kinetic energy of mars with respect to the sun as the sum of two terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. (assume mars is a uniform sphere with mass = 6.4×10 to the power of 23 kg, radius = 3.4×10 to the power of 6 m, rotation period = 24.7 hours, orbital period = 686 days and is 2.3×10 to the power of 8 km from the sun.)