Grade 11 Physics Question : Concerning the Law of Conservation of Energy?

Ramona Pago: regulation of Conservation of Mass states that remember is neither created nor destroyed and regulation of Conservation of capability states that capability is neither created nor destroyed. So merged those 2 regulations, the entire volume of mass and capability interior the universe is persevering with. this is termed regulation of Conservation of Mass-capability. So the terrific answer is D.

Derrick Cacioppo: Gravity, its the simplest of answers. I believe you would like a more scientific answer. All i can say is Gravity causes the ball to eventually lose its inertia bringing it to rest. It seems like your question should be more inertia based and less energy based. I hope this helps in any shape or form. sorry if i couldnt help :(

Jinny Dronen: This does not violate the principle of conservation of energy. Some of the energy was lost due to air resistance (not much from only 1.5m) and some was lost in the bounce. In fact, the measure of the a! mount of energy lost during the bounce is called the modulus of elasticity. Just before the ball is dropped:Ep = mgh = m(9.8 m/s^2)(1.5 m) = (14.7 m^2/s^2) mThe mass is not stated, but is constant throughout the formulas.Now, after it has bounced up:Ep = mgp = m(9.8 m/s^2)(1.3 m) = (12.74 m^2/s^2) mSo the modulus of elasticity of this ball is: 12.74 / 14.7 ~= 86.7%, although usually the kinetic energy just before the bounce and just after are usually measured, but those measures will be very close to the gravitational potential energies at the top of travel....Show more

Laveta Fathy: The law of energy conservation would suggest that dropping a ball 1.5 metres would mean it bounces back 1.3. However that is only in an ideal world, with no friction or energy loss. However when a ball is held at 1.5 m it has gravitational potential energy, which is converted to kinetic upon being let go, and upon impact energy is dissipated into the surroundings through slight heat ener! gy, sound energy (it will make a noise) and so not all energy ! is kept within the ball, meaning it doesn't bounce as high as it was....Show more

Esteban Lyson: It does NOT violate the conservation of energy law. Some of the energy is converted to HEAT created when the ball hits the ground (friction). While some of the energy is converted to SOUND. Depending on the size of the ball, WIND RESISTANCE may also be something to consider.