Question

A vehicle moving at a speed of 88 km / hr weighs 62293.5 N and its rolling resistance coefficient is 0.018. The rolling resistance of the vehicle is
1. 1121.3 N
2. 1000.4 N
3. 975.7 N
4. 845.6 N

Answer 1

Correct Answer - Option 1 : 1121.3 N

Concept:

Rolling friction: When objects such as a wheel (disc or ring), sphere, or a cylinder roll over a surface, the force of friction that comes into play are called rolling friction. Rolling friction is much weaker than sliding friction or static friction.

Mathematically, F = μR

Where, R = mg = Weight of roller and μ = friction coefficient

Calculation:

Rolling resistance, F = 0.018 × 62293.5 = 1121.3