Question:

Consider a vehicle going on a horizontal road towards east. Neglect any force by the air. The frictional force on the vehicle by the road

  • is zero if the vehicle is moving with a uniform velocity
  • is towards east if the vehicle is accelerating
  • must be towards east
  • must be towards west
Hide Solution
collegedunia
Verified By Collegedunia

The Correct Option is B

Solution and Explanation

When vehicle is moving with uniform velocity, its acceleration is zero, and external force applied is zero. Therefore, force of friction is zero. When vehicle is accelerating towards east, force exerted by rear wheels on the ground make force of friction acting in the forward direction ie, towards east.
Was this answer helpful?
0
0

Concepts Used:

Laws of Motion

The laws of motion, which are the keystone of classical mechanics, are three statements that defined the relationships between the forces acting on a body and its motion. They were first disclosed by English physicist and mathematician Isaac Newton.

Newton’s First Law of Motion

Newton’s 1st law states that a body at rest or uniform motion will continue to be at rest or uniform motion until and unless a net external force acts on it.

Newton’s Second Law of Motion

Newton's 2nd law of motion deals with the relation between force and acceleration. According to the second law of motion, the acceleration of an object as built by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

Newton’s Third Law of Motion

Newton's 3rd law of motion states when a body applies a force on another body that there is an equal and opposite reaction for every action.