A toy car released with the same initial speed will travel farthest on (a) muddy surface (b) polished marble surface (c) cemented surface (d) brick surface

Answer: (b) polished marble surface

Because a polished marble floor has the least frictional force and inertia, a car will move farthest on it.

Frictional Force

When the surface of one object comes into touch with the surface of another, friction is the force that resists motion. Friction reduces a machine’s mechanical advantage, or, to put it another way, friction reduces the output-to-input ratio. Frictional force refers to the force generated by two surfaces that contact and slide against each other.

  • Friction is caused due to the irregularities on the two surfaces in contact. So, when one object moved over the other, these irregularities on the surface get entangled, giving rise to friction.
  • The more the roughness, the more irregularities and more significant will be the friction.

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