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Doubling the mass of a moving object doubles the energy it has in its kinetic store. Doubling the speed of an object increases the energy it has in its kinetic store by four times. The energy an object has in its kinetic store of energy is found using the equation Ek = ½ mv².
Determine whether the objects in the following problems have kinetic or potential energy. Then choose the correct formula to use: KE= 1/2 m v2. PE = mass x gravity (10) x height. OR. Weight X Height. 1. You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s.
KEY. Kinetic Energy Practice Problems. 1. What is the Kinetic Energy of a 150 kg object that is moving with a speed of 15 m/s? KE = 1⁄2 mv2. KE = ? m = 150kg v = 15m/s . KE = 1⁄2 (150kg) (15 m/s)2. KE = 1⁄2 (150kg)(225) KE = 16875J. 2. An object has a kinetic energy of 25 J and a mass of 34 kg , how fast is the object moving? KE = 1⁄2 mv2.
Sample Problem. What is the kinetic energy of a 45 kg object moving at 13 m/sec? 1. First we identify the information we are given in the problem: • mass = 45 kg. • velocity = 13 m/sec. 2. Next, we place this information into the kinetic energy formula: • KE = 1/2 mv2. • KE = 1/2 (45 kg)(13 m/sec)2. 3.
KINETIC AND POTENTIAL ENERGY WORKSHEET. Potential energy: PE = mgh Kinetic energy: KE = 1/2 m v2 Total mechanical energy: ME = PE + KE. Practice problems: 1. A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby weighs 12 Kg. The carriage has ____________ energy. Calculate it.
Kinetic energy (KE) is a form of energy related to an object’s motion. KE could be translation (moving from one place to another), vibration, or rotation. KE is calculated using an object’s mass and velocity. Like PE, KE is also measured in Joules (J). KE = (1/2)mv2 where m = mass (kg), v = velocity (m/s).
Potential and Kinetic Energy Worksheet - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This document provides examples calculating potential and kinetic energy using the formulas: Kinetic Energy (KE) = 1/2 mass x velocity^2 Potential Energy (PE) = mass x gravity x height It works through 15 examples of calculating ...
