A toy rocket, weighing 10. N, blasts off from ground level. At the exact top of its trajectory, its energy is 140. J. To what vertical height does it rise?
A) 1.4 km
B) 1.4 m
C) 0.12 km
D) 12. m
E) 14. m

Question

Quizplus · Accepted Answer

The potential energy at the top of the trajectory is equal to the total energy, which is 140 J. Using the formula for gravitational potential energy (PE = mgh), where m is mass (10 N / 9.8 m/s² = 1.02 kg), g is the acceleration due to gravity (9.8 m/s²), and h is the height, we solve for h: 140 J = 1.02 kg * 9.8 m/s² * h, giving h ≈ 14 m.

A Toy Rocket, Weighing 10