tonygp17 tonygp17

Today at 11:44 PM
Physics

Answered

A student throws a 0.22 kg rock horizontally at 20.0 m/s from 10.0 m above the ground. Find the initial kinetic energy of the rock.

Answer :

quasarJose quasarJose

Today at 11:49 PM

Answer:

44J

Explanation:

Given parameters:

Mass of rock = 0.22kg

Initial velocity = 20m/s

Distance moved = 10m

Unknown:

Initial kinetic energy of the rock = ?

Solution:

To solve this problem, we need to understand that kinetic energy is the energy due to the motion of a body.

It is mathematically expressed as;

Kinetic energy = [tex]\frac{1}{2}[/tex] m v²

m is the mass

v is the velocity

Kinetic energy = [tex]\frac{1}{2}[/tex] x 0.22 x 20² = 44J

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