Vertical component compared to motion of free fall?
How does the vertical component of a projectile’s motion compare with the motion of vertical freefall when air resistance is negligible?
a) identical to that of free fall
b) greater than that of free fall
c) it cannot be determined
d) less than that of free fall?
Answers:
a) identical to that of free fall
(if the maximum height of the projectile is the same as the release height from freefall)
In both cases (when the projectile is dropping down and when the object is freefalling down):
The vertical accelerations of the particles are the same as they are dependent on the Earth's gravity (g=9.81 m/s2 - assuming downwards as positive).
The horizontal acceleration for the projectile is zero as the velocity is always the same, ie not accelerated due to negligible air resistance.
A
Gravitational Free-Fall
An object can be given an initial vertical velocity (either positive or negative) and an initial height above the ground. Displayed is the motion of the object along with both the distance vs. time and velocity vs. time diagrams.
the acceleration of any body falling or moving upwards in a gravitational field is equal to the acceleration of free fall if no external forces are acting
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a) identical to that of free fall
b) greater than that of free fall
c) it cannot be determined
d) less than that of free fall?
Answers:
a) identical to that of free fall
(if the maximum height of the projectile is the same as the release height from freefall)
In both cases (when the projectile is dropping down and when the object is freefalling down):
The vertical accelerations of the particles are the same as they are dependent on the Earth's gravity (g=9.81 m/s2 - assuming downwards as positive).
The horizontal acceleration for the projectile is zero as the velocity is always the same, ie not accelerated due to negligible air resistance.
A
Gravitational Free-Fall
An object can be given an initial vertical velocity (either positive or negative) and an initial height above the ground. Displayed is the motion of the object along with both the distance vs. time and velocity vs. time diagrams.
the acceleration of any body falling or moving upwards in a gravitational field is equal to the acceleration of free fall if no external forces are acting
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