假设您可以忽略空气阻力,您可以使用运动学方程:
v^2 + u^2 = 2as
地点:
我们可以重新排列方程来求解起始速度 u:
u = sqrt(v^2 -2as)
即使对于初学者来说,在 python 中实现它也相对简单:
def calculate_start_velocity(displacement: float, acceleration: float) -> float:
"""Calculate the start velocity for an object given its displacement and acceleration.
Args:
displacement: The displacement of the object (maximum height reached).
acceleration: The acceleration (should be negative for gravity).
Returns:
float: The calculated start velocity.
"""
final_velocity_squared = 0 # since final velocity at max height is 0
start_velocity_squared = final_velocity_squared - 2 * acceleration * displacement
start_velocity = start_velocity_squared ** 0.5
return start_velocity
def main() -> None:
"""Main function to calculate and print the start velocity."""
max_height = 80.0 # displacement
gravity = -9.805 # acceleration due to gravity
start_velocity = calculate_start_velocity(max_height, gravity)
print(f'The start velocity is: {start_velocity:.2f} m/s')
if __name__ == "__main__":
main()
输出:
39.61 m/s