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When a child rides a skateboard down an inclined ramp when the skateboard gets to exactly onehalf the starting height the child's kinetic energy?
Wiki User
∙ 13y ago
First off an assumption: dissipative forces are negligible - this means no energy goes into overcoming friction and air resistance. It also means that the total energy of the system "U" is a constant.
The total energy is the sum of the kinetic and potential energies:
U=Ke+Pe
Potential energy is a function of height and mass, kinetic is a function of mass and velocity. So at the top when the skateboard isn't moving:
Ke=1/2mv2 =0 as velocity =0
Pe=mgh
U=Pe+0=mgh Where h is the full height of the ramp.
Halfway down the ramp the height =h/2 so
Pe=mgh/2
Remembering U must be the same as it was at the top of the ramp:
U=mgh=Pe+Ke=mgh/2 +Ke
So solving gives Ke=mgh/2.
Wiki User
∙ 13y ago
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What kind of energy does a skate board have?
In physics, the kinetic energy of an object is the energy that the object possess, due to the fact that the object is moving. When the object/skateboard isn't moving it has no kinetic energy. However when it is given energy such as a push, it would move and keep going until it is stopped by another force, such as a wall.
What relationship between the potential and kinetic energy as the objects rolled down the inclined plane?
As objects roll down an inclined plane, potential energy is converted into kinetic energy. As the object loses height (potential energy), it gains speed and energy of motion (kinetic energy). The sum of potential and kinetic energy remains constant, in accordance with the law of conservation of energy.
What happens to the kinetic energy of a skateboard that is coasting along a flat surface slows downand comes to a stop?
As the skateboard slows down and comes to a stop, the kinetic energy is transferred into other forms, mainly heat and sound. Friction between the wheels and the surface, as well as air resistance, cause the skateboard's kinetic energy to be dissipated as heat and sound energy.
What force slows a skateboard when a skateboarder puts a foot down to brake?
The friction between the foot and the ground creates a force that opposes the motion of the skateboard, causing it to slow down. This friction converts the kinetic energy of the skateboard into thermal energy.
What energy transformation happens during a skateboard jump?
During a skateboard jump, the skater's potential energy is converted into kinetic energy as they push off the ground and gain speed. As the skater leaves the ground, some of the kinetic energy is transferred into potential energy due to the increase in height. Finally, when the skater lands, the potential energy is converted back into kinetic energy.
What kind of energy does a skate board have?
In physics, the kinetic energy of an object is the energy that the object possess, due to the fact that the object is moving. When the object/skateboard isn't moving it has no kinetic energy. However when it is given energy such as a push, it would move and keep going until it is stopped by another force, such as a wall.
How do you increase the kinetic energy of a skateboard?
Since kinetic energy depends on mass and speed, you can increase either of these.
Where is the maximum kinetic energy on the inclined plane?
At the point where the velocity is the maximum
How can a skateboard do what it does?
This is a mighty vague question, but I'll give it a shoot. A skateboard has wheels - when these wheels are acted upon by a force (such as you pushing it), they proceed to take the energy from that force and change it into centrifugal and centripetal forces- this causes the wheels on your skateboard to turn. Your skateboard won't roll indefinitely from 1 push because while your skateboard is rolling it is creating friction with the sidewalk you're skateboarding on. Friction is caused when 2 objects rub up against each other - this creates heat and a transfer of kinetic energy. Once all the kinetic energy has been transferred from your skateboard's wheels to the sidewalk, your skateboard come to a stop.
What type of energy is when the motion of a skateboard?
A moving skateboard has kinetic energy. If it is moving down an incline, it also has potential energy that is converted to kinetic energy as it gains speed. If its moving up an incline, kinetic energy is converted to potential energy as it loses speed.
What is the maximum kinetic energy on the inclined plane?
The maximum kinetic energy on an inclined plane occurs when the object reaches the bottom of the incline. This maximum kinetic energy can be calculated using the formula: KE = 0.5 * m * v^2, where m is the mass of the object and v is the velocity at the bottom of the incline.
What relationship between the potential and kinetic energy as the objects rolled down the inclined plane?
As objects roll down an inclined plane, potential energy is converted into kinetic energy. As the object loses height (potential energy), it gains speed and energy of motion (kinetic energy). The sum of potential and kinetic energy remains constant, in accordance with the law of conservation of energy.
What happens to the kinetic energy of a skateboard that is coasting along a flat surface slows downand comes to a stop?
As the skateboard slows down and comes to a stop, the kinetic energy is transferred into other forms, mainly heat and sound. Friction between the wheels and the surface, as well as air resistance, cause the skateboard's kinetic energy to be dissipated as heat and sound energy.
What force slows a skateboard when a skateboarder puts a foot down to brake?
The friction between the foot and the ground creates a force that opposes the motion of the skateboard, causing it to slow down. This friction converts the kinetic energy of the skateboard into thermal energy.
What energy transformation happens during a skateboard jump?
During a skateboard jump, the skater's potential energy is converted into kinetic energy as they push off the ground and gain speed. As the skater leaves the ground, some of the kinetic energy is transferred into potential energy due to the increase in height. Finally, when the skater lands, the potential energy is converted back into kinetic energy.
Does kinetic energy decreases as a box accelerates down an inclined plane?
Kinetic energy increases; potential energy decreases, because the object is now in motion
How does the energy in a skateboard change as it goes down hill?
the skateboards potential energy becomes kinetic energy and heat energy.
