which has more gpe, a 4 kg ball at 20 m or a 7 kg rock at 11 m in height?
which has more gpe, a 4 kg ball at 20 m or a 7 kg rock at 11 m in height?
Answer
Explanation:
Step1: Calculate GPE for the ball
The formula for gravitational potential energy (GPE) is (GPE = mgh), where (m) is mass, (g = 9.8\ m/s^{2}), and (h) is height. For the ball: (m = 4\ kg), (h = 20\ m) (GPE_{ball}=4\times9.8\times20) (GPE_{ball}=784\ J)
Step2: Calculate GPE for the rock
For the rock: (m = 7\ kg), (h = 11\ m) (GPE_{rock}=7\times9.8\times11) (GPE_{rock}=7\times107.8) (GPE_{rock}=754.6\ J)
Answer:
The (4\ kg) ball at (20\ m) has more GPE.