Question

You know the height from which an object is dropped. Which equation could you use to calculate the velocity as the object hits the ground?

a) (v = sqrt{2gh})

b) (v = gt)

c) (v = frac{gt}{2})

d) (v = frac{2gh}{t})

Answer 1

The equation to calculate the velocity as an object hits the ground when you know its height is v = sqrt{2gh}.

Step-by-step explanation:

The correct equation to calculate the velocity as an object hits the ground, given that you know the height from which it is dropped, is v = sqrt{2gh}. This equation is derived from the principle of conservation of energy and is known as Torricelli's theorem. It states that the final velocity (v) is equal to the square root of (2gh), where g is the acceleration due to gravity and h is the height.