The weight of 200 g slides off a 2 m long slope plane, which makes an angle

The weight of 200 g slides off a 2 m long slope plane, which makes an angle of 30 degrees with the horizontal. what is the work of gravity equal to?

Work is measured in joules and is denoted by J. 1 J = 1 kg * m ^ 2 / s ^ 2.
Let’s translate grams into kilograms: 200 g = 0.2 kg.
Work is equal to a change in potential energy. The potential energy is equal to Ep = mgh. Work is equal to: A = En1-En2 = mgh1 – mgh2.
Find the height of the slide. The length is the hypotenuse, the angle is 30 degrees. Height is the opposite leg, equal to the product of the hypotenuse and the sine of the angle: h = sin (30) * 2 = 0.5 * 2 = 1. At the end of the slide, the height will be zero.
Work is equal to A = mgh1 – mgh2 = 0.2 * 10 * 1-0.2 * 10 * 0 = 2 J.
Answer: 2 J