A car is running on a road at a uniform speed of 60 km/hr. The net resultant force on the car is:

A car moving at a uniform speed on a straight road has constant velocity; thus its acceleration is zero. In such situations the driving force from the engine is balanced by resistive forces (air resistance, friction), so the resultant (net) force is zero. Newton’s First Law states that a body in motion at constant velocity remains so unless acted upon by an outside (unbalanced) force, implying no net force when velocity is steady [1]. Since forces cause changes in speed or direction, the absence of any change in motion indicates no net unbalanced force acting on the car [1]. Therefore option 4 (Equal to zero) is correct.

Sources

1. [1] https://www.grc.nasa.gov/www/k-12/WindTunnel/Activities/first2nd_lawsf_motion.html
2. [2] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 5: Exploring Forces > Snapshots > p. 77