Consider a vehicle going on a horizontal road towards east. Neglect any force by the air. The frictional forces on the vehicle by the road
(a) is towards east if the vehicle is accelerating
(b) is zero if the vehicle is moving with a uniform velocity
(c) must be towards east
(d) must be towards west.
Answers
Answer ⇒ Option (a). and option (b).
Explanation ⇒ The Friction is the tangential force which always opposes the Relative Motion.
∴ If the Vehicle is moving towards east then friction will be acting west. But this case is true only when the acceleration of the vehicle is constant or it is increasing (not decreasing, because in case of decreasing friction will acts towards east), then Friction will be acting west.
Now, If the vehicle is accelerating which means acceleration is towards east.
Also, Frictional force may be zero because nothing is sure about the velocity of the object. If velocity will be uniform no force will be required to move it, therefore, Friction will also be zero.
Hope it helps.
ans
Boh a and b
Consider the circular motion