Question

To move at the same speed, a car with a flat face and another with a streamlined body will require a different amount of force from the engine. The engine of the streamline bodied car will:

• A. Exert less force
• B. Exert more force
• C. Exert zero force
• D. Exert no force

Answer 1

The correct option is A Exert less force

Friction opposes the relative motion between two surfaces in contact. Fluid friction can be minimized by giving suitable shapes to bodies moving in fluids. A car with a streamlined body suffers less air friction while moving and a car with a flat face will suffer higher air friction. As a result car with a streamlined body will require less force from the engine to maintain the same speed.