It depends on how many hours!
1 hour = 40km
2 hours = 80km
Potential energy can be calculated using the following rule:
potential energy = mgh where:
m is the mass = 85 kg
g is the acceleration due to gravity = 9.8 m/sec^2
h is the height = 4 km = 4000 meters
Substitute in the above equation to get the potential energy as follows:
Potential energy = 85*9.8*4000 = 3332000 joules
Answer:
14 newtons is the answer
Explanation:
because if they act in the same direction they are added together
Can you give more information