If a body is in motion, some force, of necessity, acted upon it to get it moving in the first place. However, if no furtherforces are acting upon it, including, for example, friction, gravity or solar radiation as with an object traveling through space, for example, the object would tend to continue on its path, unaltered, ad infinitum.
Some forces that can act upon a moving object include friction, air resistance, gravity, and applied forces like pushing or pulling. These forces can affect the speed, direction, and motion of the object.
Friction, air resistance, and opposing forces like gravity can all act on an object to make it stop moving. These forces create resistance against the object's motion, eventually bringing it to a halt.
No, balanced forces do not change an object's motion. When balanced forces act on an object, the object will either remain at rest or continue moving at a constant velocity.
When the entire group of forces acting on an object is balanced, the object's motion is 'uniform' ... its speed is constant and it moves in a straight line. If its speed is changing or its path is not straight, that's called "acceleration", and it means that the group of forces acting on the object is not balanced.
When two forces act in opposite directions on an object, they create a net force that is the difference between the two forces. The object will accelerate in the direction of the greater force. If the two forces are equal in magnitude, the object will remain stationary or continue moving at a constant velocity.
Intertia is the tendency of an object to maintain its velocity: if an object is at rest, it has the tendency to remain at rest; if it is moving, the tendency is to keep moving with the same velocity. That is what happens if no forces act on the object; if forces act on the object, including gravitation, friction, and others, its velocity will change.
Some forces that can act upon a moving object include friction, air resistance, gravity, and applied forces like pushing or pulling. These forces can affect the speed, direction, and motion of the object.
Inertia
Yes.
A group of balanced forces adds vectorially to zero, so has no effect on any object, whether it's moving or not moving.
If forces on an object are unbalanced, the object will accelerate or decelerate. If forces on an object are balanced, the object will stay still or keep moving with the same velocity.
Friction, air resistance, and opposing forces like gravity can all act on an object to make it stop moving. These forces create resistance against the object's motion, eventually bringing it to a halt.
It's not necessary to specify that the object is moving at a constant speed. Any object with no outside forces acting on it does that. It also continues moving in a straight line.
No resultant forces act upon it
No, balanced forces do not change an object's motion. When balanced forces act on an object, the object will either remain at rest or continue moving at a constant velocity.
When the entire group of forces acting on an object is balanced, the object's motion is 'uniform' ... its speed is constant and it moves in a straight line. If its speed is changing or its path is not straight, that's called "acceleration", and it means that the group of forces acting on the object is not balanced.
Sure. If all of the forces on an object are balanced, then the object continues moving in a straight line at constant speed. All of the forces on an airplane cruising in level flight, or on a car on cruise-control on a straight piece of road, are balanced.