A bumblebee weighing 10g flies 2ms at a height of 80 cm above the ground.

A bumblebee weighing 10g flies 2ms at a height of 80 cm above the ground. Calculate the kinetic and potential energy of the bumblebee relative to the ground.

Given:
m = 10 g = 10 * 0.001 kg = 0.01 kg;
v = 2 m / s;
h = 80 cm = 80 * 0.01 m = 0.8 m;
g = 9.8 N / kg;
Find: Eк; Ep -?
Decision:
Let’s calculate the kinetic energy according to the formula Ek = (mv²) / 2, where m is the mass of the bumblebee, v² is the speed of the bumblebee squared.
Ek = (0.01 kg * (2 m / s) ²) / 2 = 0.02 J.
The potential energy is calculated by the formula En = mgh, where m is the mass of the bumblebee, g is the acceleration of gravity, h is the height.
Ep = 0.01 kg * 9.8 N / kg * 0.8 m = 0.0784 J.
Answer: Ek = 0.02 J; Ep = 0.0784 J.