Posted by Anonymous on .
The wheels of a midsize car exert a force of 2100 N backward on the road to accelerate the car in the forward direction. If the force of friction including air resistance is 250 N and the acceleration of the car is 1.80 m/s2, what is the mass of the car plus its occupants?
4.

physics 
bobpursley,
netforce=m*a
2100250=m*1.8 solve for mass m. 
physics 
Anonymous,
1027