Approximately, yes. But detailed analysis would require you to take account of its aerodynamic properties, of any rotational motion as it falls, etc.
Accelerated motion.
If the body is freely falling, this sum will remain constant.
A freely falling body A car moving along a straight road. Light too has rectilinear propagation.
If the 'weight' of a body is the gravitational force between the body and the Earth, then as long as the body stays at about the same distance from the center of the Earth, its weight is constant, and has no connection with its motion.
Velocity
Accelerated motion.
Freely falling body is a good example
No. "Uniform motion" means motion at a constant speed in a straight line. But the speed of a body falling freely to the ground is continuously increasing, in response to the force of gravity.
A freely falling body Planet going around the sun electron going around the nucleus
If the body is freely falling, this sum will remain constant.
A freely body is the body which is freely falling under the force of gravity i.e. an acceleration of 9.8 m/s2
A freely falling body A car moving along a straight road. Light too has rectilinear propagation.
If the 'weight' of a body is the gravitational force between the body and the Earth, then as long as the body stays at about the same distance from the center of the Earth, its weight is constant, and has no connection with its motion.
Velocity
You're probably thinking of the term 'free-fall' or 'freely falling', or in relativity you might say it follows a 'geodesic'.
no force act on it
Nothing. If the 'weight' of a body is the gravitational force between the body and the Earth, then as long as the body stays at about the same distance from the center of the Earth, its weight is constant, and has no connection with its motion.