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How much kinetic energy does a 7.2-kg dog need to make a vertical jump of 1.2 m the acceleration due to gravity is 9.8 ms2?
Wiki User
∙ 9y ago
The kinetic energy with which he leaves the ground must be at least equal to
the potential energy he will have when he reaches 1.2 meters above it.
Potential energy = (mass) x (gravity) x (height) = (7.2) x (9.8) x (1.2) = 84.672 Joules.
If the dog has that much KE AND his speed off the ground is entirely vertical,
then he'll just reach 1.2 meters.
(The same argument applies if the dog is a female. I just naturally wrote a male
dog into the solution because both of my dogs are boys.)
Wiki User
∙ 9y ago
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The water runs down hill. That's why all rivers lead to the sea.
How is kinetic energy formed?
Kinetic energy is a form of energy that comes from motion. Therefore any moving object (that has a mass!) has kinetic energy. For kinetic energy to be produced, a force must act upon an object to give it an acceleration, to put it in motion. The simplest case is the conversion of potentiel energy to kinetic energy. When an object is far from its "normal" standing position (in this case the ground), it is said to have potential energy. When this object is attracted by the force of gravity, its potential energy is slowly converting into kinetic energy because the objet keeps on accelerating.
What energy is a falling apple in a tree?
From gravitational potential energy to kinetic energy and if you want it until it drops onto the ground , (continue from kinetic energy) heat energy + sound energy.
What type of energy exists in a ball sitting on top of a hill?
kinetic energy
Kinetic energy is the energy of?
Motion.
Is gravity kinetic energy?
There is no "gravity kinetic energy". There is gravitational energy (a type of potential energy), and - separately - there is kinetic energy (the energy of movement).
When gravity is pulling on something does the something have kinetic energy?
The object can be stationary and have gravity pulling on it ergo no kinetic energy
What type of energy is stored in thermal energy-kinetic or potential energy?
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Is gravity energy?
No. Gravity is a force. Potential energy turns into kinetic (moving) energy when you fall due to gravity.
What is the main kinetic energy?
gravity
Is gravity potential or kinetic energy?
Gravity is a force more so than an energy
Gravity your kinetic energy when you are driving uphill and it when you are driving downhill?
it is both kinetic and potential energy
What happens when gravity pulls water down a slope?
The water runs down hill. That's why all rivers lead to the sea.
What factors effect potential and kinetic energy?
Use the formula for kinetic energy: KE = (1/2) mv2 (one-half times the mass times speed squared). Clearly, the amount of kinetic energy depends both on the mass and on the speed of the object.
The amount of kinetic energy in an object is based on its?
mass and acceleration
Does a book falling from a shelf have gravitational energy?
Yes; while on the shelf it has potential energy due to gravity of mgh where m = mass and g =gravity acceleration and h is height fom floor. As it falls its potential energy is converted to kinetic energy mv squared/2 where v = velocity
What are two types of mechanisms?
The traditional definitions are kinetic energy (due to motion) and potential energy (due to the relative location within a gravity field).There is really only one type and it is the sum of the gravitational potential energy and the kinetic energy. Mechanical energy = (Mass)((Gravitational acceleration)(Height)+(1/2)(Velocity)²)
