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Determine whether the objects in the following problems have kinetic (KE) or potential energy. (PE). Then, use the appropriate formula to calculate the answer. KE = mass x velocity2 2 PE = m (mass) x g (gravity) x h (height) On Earth, gravity (g) = 9.8 m/s2, so in the formula substitute 9.8 for gravity. 7. You serve a volleyball with a mass of ...
Kinetic Energy KE. Kinetic energy KE, is energy associated with motion. KE = 1⁄2 mv2. where m = mass in kilograms (kg), and v is the speed in m/s. The unit of kinetic energy is the joule (J) If an object’s speed is doubled, then its kinetic energy is quadrupled.
To identify the two forms of mechanical energy, to distinguish between mechanical and non-mechanical energy, to describe the relationship between mechanical energy and work, and to relate the total mechanical energy (TME) to the amounts of kinetic energy (KE) and potential energy (PE).
To understand energy and conservation of energy, we must first define some terms: work, kinetic energy (KE), and potential energy (PE). We’ll get to PE in the next Chapter. Let’s look at work and KE. Definition of work done by a force: consider an object moving while a constant force F is applied to the object.
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.
o k is the spring constant. o Δx is the displacement of the system or object from equilibrium or rest position. o Because the spring constant cannot be negative and the displacement is squared, elastic potential energy cannot be negative. The units for Work and Energy are the same, they are joules, J. Work and Energy are scalars.
Using a metric ruler and the scale of 1.0 cm = 3.0 m., determine the height of each hill. Calculate the gravitational potential energy at the top of each hill. Show all work including the equation and substitutions with units. Calculate the gravitational potential energy at the bottom of each hill.
