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?a)The object will move with acceleration.b)The object will move with deceleration.c)The object will move with constant speed, but varying direction.d)The object will move with constant velocity.Correct answer is option 'D'. Can you explain this answer?

Question

Answer

Explanation:

Net Force Acting on the Object:
- According to the third law of motion, for every action, there is an equal and opposite reaction. In this case, the gravitational pull downwards is balanced by the normal reaction force acting upwards from the surface.
- Since the net resultant force is zero (equal and opposite forces cancel each other out), the object will move with a constant velocity.

Frictionless Surface:
- The horizontal frictionless surface ensures that there are no external forces acting on the object, apart from the gravitational pull and normal reaction force.
- Without any external force to change its velocity, the object will continue to move in the same direction with the same speed.

Constant Velocity:
- When the net force acting on an object is zero, it will continue to move at a constant velocity.
- In this case, the object will move with constant velocity on the frictionless surface as there is no force to change its motion.

Therefore, the correct answer is option 'D' - The object will move with constant velocity.

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