Statements (iii) and (iv) are correct. At the highest peak, vertical velocity momentarily becomes zero making kinetic energy zero, while the entire initial mechanical energy turns into maximum gravitational potential energy at that height.
When a ball thrown upwards reaches its highest point, tick which of the following statement(s) are correct? (i) The force acting on the ball is zero. (ii) The acceleration of the ball is zero. (iii) Its kinetic energy is zero. (iv) Its potential energy is maximum.
Share
Statements (iii) and (iv) are correct. At the highest point of its vertical flight, the upward velocity of the ball becomes momentarily zero, causing its kinetic energy to drop to zero. Because the height is greatest, its gravitational potential energy reaches maximum. Statements (i) and (ii) are incorrect because downward gravitational force and acceleration due to gravity g act continuously on the ball.
For more NCERT Solutions of Class 9 Science Exploration Chapter 7 Work, Energy and Simple Machines Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-7/