Question

What are the kinematic assumptions for objects thrown vertically downwards?

1) The object is in free fall
2) The object experiences constant acceleration
3) The object moves in a straight line
4) The object does not experience air resistance

Answer 1

Objects thrown vertically downwards in kinematic assumptions are in free fall, have constant acceleration due to gravity, move in a straight line, and do not experience air resistance.

Step-by-step explanation:

When analyzing the kinematic assumptions for objects thrown vertically downwards, we consider the motion to be one-dimensional and having constant acceleration due to gravity (g). The object is indeed in free fall, meaning no external forces like air resistance or friction are acting on it, apart from gravity. This allows us to apply the kinematic equations cleanly. Here are the key assumptions simplified:

• The object is in free fall.
• The object experiences constant acceleration due to gravity, which is on average g = 9.80 m/s² downwards.
• The object moves in a straight line along the vertical axis.
• The object does not experience air resistance or any other forms of friction.

These assumptions simplify the analysis of the motion and are typically used when initial velocities and displacements are known, allowing for the prediction of future positions and velocities.