The book is ignoring air resistance. Can you see that in the absence of air resistance, horizontal velocity must be constant?anandzoom said:
Projectile motion is the motion of an object through the air that is affected by gravity. It follows a curved path, known as a parabola, due to the force of gravity pulling it towards the ground.
A sand bag drop demonstrates projectile motion because the sand bag is initially at rest, and when dropped, it follows a curved path as it falls due to the force of gravity acting on it. The sand bag also has a horizontal velocity component, giving it a parabolic trajectory.
The factors that affect the trajectory of a sand bag drop include the initial height of the drop, the angle at which it is dropped, the initial velocity of the sand bag, and the force of gravity.
The mass of the sand bag does not affect its motion in terms of its trajectory, as long as air resistance is negligible. However, a heavier sand bag will experience a greater force of gravity and accelerate faster towards the ground, reaching the ground at the same time as a lighter sand bag dropped from the same height.
Yes, the equations of projectile motion can be applied to a sand bag drop, as long as air resistance is negligible. These equations include the vertical and horizontal components of the sand bag's motion, such as velocity, acceleration, and displacement.
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