5. Which of the following is true about the ball's velocity and acceleration the highest pointB?A. Its velocity and acceleration are both zeroB. Its velocity is up and non-zero constant and acceleration is zeroC Its velocity is down and non-zero constant and acceleration is zeroD Its velocity is zero and acceleration is down and non-zero constant6.A ball is tossed straight up with an initial velocity of 5 0 m/s. What is the speed of theball at its maximum height?A 0 Om/s B 50 m/s 0.9.8 m/s D. 14.8 m/s7. Four students were discussing projectile motion in the canteen after science class Whodo you agree with?Luz: "A projectile's Vx changes because of gravity, and its Vy remains constant"Joseph: "Both Vx and Vy are constant."Tito: 'A projectile has no acceleration in the vertical dimension but it does acceleratehorizontally."Jay: "A projectile has vertical acceleration and a constant horizontal velocity"A Luz B Joseph C. Tito D Jayshow
Answer (1)
Answer:5. D6. A7. DExplanation5. D: At the highest point of its trajectory, the ball’s velocity is zero because it momentarily stops before descending. However, its acceleration due to gravity is still acting downward and is non-zero.6. A: At its maximum height, the ball’s speed is 0 m/s because it stops momentarily before starting to fall back down.7. D: Jay is correct. A projectile has vertical acceleration due to gravity and a constant horizontal velocity because there is no horizontal acceleration (assuming air resistance is negligible).
