Question

Assertion : An object can move with constant velocity if no net force acts on it.

Reason : No net force is needed to move an object with constant velocity.​

Answer 1

Assertion: An object can move with constant velocity if no net force acts on it. Reason: No net force is needed to move an object with constant velocity.

In this Assertion is correct, the reason is correct; the reason is a correct explanation for assertion.​

• A force is indeed an engagement between things that causes the items to accelerate. When there has been a resultant force on an item, acceleration happens; because when resultant force (the total of all forces) is zero, no acceleration happens.
• In other words, while there is a force acting, acceleration arises, however when forces are equal, no acceleration occurs. Because an imbalanced force involves a alter in velocity (magnitude and/or direction), an unbalanced force will cause an object's velocity to vary.
• An object that really is initially at repose and it has no net pressures operating on it will remain at repose. If it's going, it will keep on operating in a symmetrical line at a consistent speed.

• Forces were "pushes" and "pulls" onto an object, and they are vector numbers, like velocity & acceleration.

• Vectors have two properties: magnitude and direction. When two forces are added together, a resultant or net force is produced, which is represented by a third vector.
• The method for adding the two vectors is to place the first vector's tip on the tail across another vector, resulting in a third vector that spans first from the tail across the first to the point of the second.

Answer 2

Assertion is correct and reason is also correct. Reason is correct explanation of assertion.

Explanation:

• Velocity is a vector quantity which has both magnitude as well as direction.
• Constant velocity means that the direction as well as the magnitude will be constant.
• The object will not be changing either its direction or its speed.
• But still there is motion in the object as it is moving with uniform or constant velocity.
• There is no change in velocity which means the acceleration is zero.
• So, force is absent which means that a body can be in motion even without any force acting on it.