Free Fall Physics
* Acceleration due to gravity: The primary force acting on an object in free fall is gravity, which causes a constant downward acceleration of approximately 9.8 m/s². This means the object's velocity increases by 9.8 m/s every second.
* Initial velocity: The object might have started its fall from rest (initial velocity = 0 m/s), or it might have been thrown upwards or downwards, giving it an initial velocity.
Calculating Velocity
To calculate the velocity after 1.5 seconds, you'd use the following equation:
v = u + at
where:
* v is the final velocity
* u is the initial velocity
* a is the acceleration due to gravity (9.8 m/s²)
* t is the time (1.5 s)
Example:
* If the object starts from rest (u = 0 m/s):
* v = 0 + (9.8 m/s²) * (1.5 s) = 14.7 m/s downwards
* If the object is thrown upwards with an initial velocity of 5 m/s (u = 5 m/s):
* v = 5 + (9.8 m/s²) * (1.5 s) = 19.7 m/s downwards (the object would be moving downwards at this point)
Conclusion:
The velocity of an object in free fall after 1.5 seconds depends on its initial velocity. You need to know the initial conditions to calculate the final velocity.
