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Kinematics
Kinematics is the study of how a body moves. This includes linear motion, angular motion, and rotational motion.
3,459 Questions
If a sprinter has a mass of 80 kg and a kinetic energy of 3000 what is the speed?
Although the units of the kinetic energy aren't given, we have to assume that the "3,000"
are joules ... the SI unit of energy; otherwise we can't go anywhere at all with this question.
K.E. = 1/2 m V2 = 3,000 joules
m V2 = 6,000
80 V2 = 6,000
V2 = 6,000/80 = 75
V = sqrt(75) = 8.66 meters per second (rounded)
Total amount of energy an object has?
The total amount of energy an object has is its sum of kinetic energy (energy of motion) and potential energy (stored energy). This can be calculated using the equation: total energy = kinetic energy + potential energy.
Kinetic energy = 1/2(mass in kg)(meters per second squared )
KE = 1/2(175 kilograms)(3 m/s)^2
= 787.5 Joules
How long do it take for a Train traveling at 55 mph to stop after the emergency brakes are applied?
It can take a train traveling at 55 mph anywhere between 1 to 2 miles to come to a complete stop after the emergency brakes are applied, depending on various factors like the weight of the train and track conditions.
What is the top speed for a 1993 polaris Indy 440 liquid cooled?
about 62 mph. and I'm about 200pounds too.
those things are fast.They are more of a trail riding bike than a utility bike
Execute a swan dive would be kinetic energy or potential energy?
Executing a swan dive involves both kinetic and potential energy. When the person jumps off the platform and falls towards the water, they possess potential energy due to their height above the water. As they dive and move through the air, this potential energy is converted into kinetic energy of motion.
How does kinetic energy affect your life?
Kinetic energy is the energy an object possesses due to its motion. In daily life, kinetic energy plays a role in activities such as walking, driving a car, or playing sports. Understanding kinetic energy helps in calculating the speed and impact of moving objects, which is important for safety in various situations.
If you toss a ball in the air at what point does it have the most kinetic energy?
As soon as the ball has been released.
In this case, the energy starts off purely kinetic; dependent on motion. Once the ball has reached it's highest point, it has converted to potential energy; dependent on height. It then resumes falling back to kinetic energy. This is best shown by a graph of energy over time where Potential energy is a parabola opened down (frown face) and Kinetic energy is a parabola opened up (smiley face).
With this you can also note that Kinetic Energy + Potential Energy = mechanical energy. These two graphs added together should make a straight line for Mechanical energy (in simplistic demonstration).
Is friction independent of the area of contact?
Generally no. The friction force is typically assumed independent of surface area, and proportional to the force between the two objects. By changing the contact area, you are changing how that force is concentrated. i.e. a small surface area means that your force is distributed across a small region, creating a high pressure (force/area) at the contact. By increasing the surface area, you distrubte that force and lower the pressure.
This is, however, an idealization and can break down in some instances.
Where is mechanical energy on a roller coaster?
Mechanical energy is used on the chains that pull the roller coaster cars up the tallest incline, which is typically located at the start of the track. Mechanical energy is also used in the braking system that slows the cars to a stop at the end of the track.
The sum of the kinetic and potential energy of all the atoms in an object?
The sum of the kinetic and potential energy of all the atoms in an object is equal to the total internal energy of the object. This internal energy is a measure of the microscopic energy associated with the motion and positions of the atoms within the object. Additionally, this internal energy contributes to the overall temperature and state of the object.
well I'm guessing about 80 or 85 but my Friends about 12 can pitch 60 70 and if you keep training your arms, legs, abs for arms most of your speed comes from your arm and abs also if you but your throwing leg really high after the pitch you increase about 5 10 mph because your throwing your body also pretend you found like a dollar bill on the ground and like your picking it up after you throw.
Is pressure a scaler quantity?
Pressure is no vector. Pressure is a scalar. Pressure-gradient is a vector.why pressure is a scalar
How do you calculate kph to mph?
To convert kilometers per hour (kph) to miles per hour (mph), you can multiply the kph value by approximately 0.621 to get the equivalent mph value. For example, if a vehicle is traveling at 100 kph, you can multiply 100 by 0.621 to find that it is traveling at approximately 62.1 mph.
How many miles per hour is 30 nots?
One knot is equivalent to 1.15 miles per hour. Therefore, 30 knots would be approximately 34.5 miles per hour.
How do you convert 130 km into miles per hour?
To convert kilometers per hour to miles per hour, you can multiply by 0.6214.
Therefore, 130 km/hr is equal to approximately 80.78 miles per hour.
Name a device that is designed to change electrical energy into kinetic energy?
AC and DC generators(also called dynamos).
Whenever magnetic flux through a closed wire loop changes current flows in it. We use mechanical energy to produce change in flux and generate electricity.
A device that converts mechanical energy into electrical energy is called an Electric Generator. It works by inducing an electric current in a loop of wire by using magnetic fields.
An electrical generator or Dynamo. The mechanical energy moves a magnetic field relative to electric coils and creates electricity. Little Dynamos on bicycles provide light at night.
What are the two parts of kinetic energy?
The non-relativistic equation for kinetic energy is mv^2/2 where mass is m and velocity is v. The relativistic kinetic energy equation is m/(1-(v^2/c^2))-m where m is mass, v is velocity and c is the speed of light. The two variables which determine the kinetic energy of an object are mass and velocity.
How many feet per second at 45mph?
The ratio is 5280 feet in a mile / 3600 seconds in an hour.
So 45 m/h * 5280 f/m / 3600 s/h = 66 f/s
The rotational kinetic energy of the wheel can be calculated as (1/2)Iω^2, where I is the moment of inertia of the wheel and ω is its angular velocity. The total translational kinetic energy of the motorcycle can be calculated as (1/2)mv^2, where m is the total mass of the motorcycle and v is its velocity. The ratio of the rotational kinetic energy of the wheels to the total translational kinetic energy is then (1/2)(Iω^2) / (1/2)(mv^2).
You are correct. When the jet moved, she moved with it. If she was moving faster than she was before, then she gained kinetic energy. She lost that kinetic energy when the plane touched down and came to a stop.
How mach is the ticket to America?
The cost of a ticket to America can vary greatly depending on the airline, route, time of booking, and class of ticket. On average, prices range from $300 to $1500 for a one-way ticket, and $600 to $3000 for a round-trip ticket. It's best to check with different airlines and travel websites to find the best deals.
According to the law of conservation of energy, energy cannot be created or destroyed, only transferred or transformed. This principle applies to work input and output, as the total work output of a system will always be equal to the total work input. Any work done on a system is transformed into some form of energy that is then used to perform the work output.
