Summative Assessment: 1. If a free falling ball is equipped with a speedometer, by how much would its speed reading increase for every second? A. $$ 0 \mathrm{~m} / \mathrm{s} $$ B. $$ 9.8 \mathrm{~m} / \mathrm{s} $$ C. $$ 10 \mathrm{~m} / \mathrm{s} $$ D. $$ 20 \mathrm{~m} / \mathrm{s} $$ 2. A sepak takraw ball is hit vertically upward by a player. What is its acceleration after 1 second? A. 0 B. $$ 1 \mathrm{~m} / \mathrm{s}^{2} $$ C. $$ \quad 9.8 \mathrm{~m} / \mathrm{s}^{2} $$ D. $$ -9.8 \mathrm{~m} / \mathrm{s}^{2} $$ 3. A volleyball is tossed vertically upward, with an initial velocity of $$ 5 \mathrm{~m} / \mathrm{s} $$ and caught back at the same level as when it was thrown. What is the velocity of the ball at that point? A. $$ 0 \mathrm{~m} / \mathrm{s} $$ B. $$ -5 \mathrm{~m} / \mathrm{s} $$ C. $$ -9.8 \mathrm{~m} / \mathrm{s} $$ D. $$ -9.8 \mathrm{~m} / \mathrm{s}^{2} $$ 4. The motion of an object with constant acceleration is also known as $$ \qquad $$ . A. Motion B. Uniform Motion C. Constant Motion D. Uniformly Accelerated Motion

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1. For a free falling ball under Earth’s gravity, the acceleration is given by  
   $$
   g \approx 9.8 \, \mathrm{m/s^2}.
   $$  
   Since the ball starts from rest and accelerates uniformly, its speed reading increases by approximately  
   $$
   9.8 \, \mathrm{m/s}
   $$  
   for every second.  
   **Answer: $$ 9.8 \, \mathrm{m/s} $$.**

2. When the sepak takraw ball is hit vertically upward, it still experiences the constant acceleration due to gravity. Regardless of its upward motion, the acceleration immediately after 1 second remains  
   $$
   -9.8 \, \mathrm{m/s^2}
   $$  
   (the negative sign indicates the direction is downward).  
   **Answer: $$ -9.8 \, \mathrm{m/s^2} $$.**

3. A volleyball tossed vertically upward with an initial velocity of  
   $$
   5 \, \mathrm{m/s}
   $$  
   has its motion governed by the symmetry of projectile motion (ignoring air resistance). When it returns to the same level it was thrown from, its speed is equal in magnitude but opposite in direction. Hence, the velocity at that point is  
   $$
   -5 \, \mathrm{m/s}.
   $$  
   **Answer: $$ -5 \, \mathrm{m/s} $$.**

4. An object moving with constant acceleration is said to be undergoing  
   $$
   \textbf{Uniformly Accelerated Motion}.
   $$  
   **Answer: Uniformly Accelerated Motion.**
1. The speed of the free-falling ball increases by $$ 9.8 \, \mathrm{m/s} $$ every second. 2. The acceleration of the sepak takraw ball after 1 second is $$ -9.8 \, \mathrm{m/s^2} $$. 3. The velocity of the volleyball when it returns to the starting point is $$ -5 \, \mathrm{m/s} $$. 4. An object with constant acceleration is undergoing **Uniformly Accelerated Motion**.

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