2. 1D Motion / Kinematics

In the absence of air resistance, how many forces act on an object in free fall near the surface of the $Earth$?

A rock is dropped from rest from a height of $2.5$ meters. What is its velocity just before it reaches the ground? (Assume $g=9.8m/s^2$ and ignore air resistance.)

Two balls of different masses are dropped from the same height in the absence of air resistance. Which ball has a greater acceleration as it drops toward the ground?

In which of the following scenarios is a baseball in free fall?

In the absence of air resistance, which of the following statements about an object in free fall near Earth's surface is correct?

If you throw a ball straight up into the air and ignore air resistance, what is the velocity of the ball at its highest point ($v$)?

An object is dropped from rest from a height of $25$ meters. Assuming no air resistance, what is its velocity just before it hits the ground? (Take $g=9.8m/s^2$)

An object is projected vertically upward with initial speed $u$. What is its speed $v$ when it reaches a height equal to half of its maximum height $\frac{1}{2}{h}_{\max }$?

How does air resistance affect the acceleration of a falling object during free fall?

As an air mass rises vertically in the atmosphere, what typically happens to its temperature?

A package is dropped from rest from a height $h$ above the ground, neglecting air resistance. What is the speed $v_f$ of the package when it hits the ground?

When an object is in free fall near Earth's surface, what is the only force acting on it?

When you throw a ball directly upward, what is the velocity $v$ of the ball at its highest point?

Why are objects that fall near Earth's surface rarely in free fall?