A person throws an object on a horizontal frictionless plane surface. It is noticed that there are two forces acting on this object—(i) gravitational pull and (ii) normal reaction of the surface. According to the third law of motion, the net resultant force is zero. Which one of the following can be said for the motion of the object?
The object will move with acceleration.
The object will move with deceleration.
The object will move with constant speed, but varying direction.
The object will move with constant velocity.
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CDS-2 – 2017
According to Newton’s first law of motion, an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. With zero net force acting on the object in both vertical and horizontal directions, its velocity (magnitude and direction) remains constant.