A 2 kg projectile is launched from ground level at an angle of 30° with an initial speed of 40 m/s. Neglecting air resistance and taking , what is its kinetic energy at the peak of its trajectory?
Answer and explanation
Correct answer: A. Kinetic energy at peak is 1.200 J
- Step 1: At the highest point, vertical velocity , and horizontal velocity remains constant: m/s. Step 2. Kinetic energy at peak: J. Answer: Kinetic energy at peak is 1.200 J. Why not the others: Total initial energy is 1600 J, of which 400 J becomes potential energy and 1200 J remains kinetic energy.
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