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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
How do you convert 45 miles per hour to how many feet per minute?
To convert 45 miles per hour to feet per minute, first convert miles to feet by multiplying by 5,280 (since 1 mile = 5,280 feet). Next, divide by 60 to convert hours to minutes.
45 miles/hour * 5,280 feet/mile / 60 minutes/hour = 3,960 feet/minute.
Does increasing the mass or velocity have the most affect on an object's kinetic energy?
Increasing an object's velocity has a greater effect on its kinetic energy than increasing its mass. This is because kinetic energy is directly proportional to the square of the object's velocity, while it is linearly proportional to the object's mass.
What is the speed of an object that has 7.5 joules of kinetic energy and a mass of 82 gr?
The speed of an object with 7.5 joules of kinetic energy and a mass of 82 grams can be calculated using the formula: KE = 0.5 * mass * speed^2. Rearranging the formula gives speed = sqrt(2 * KE / mass). Plugging in the values gives a speed of approximately 5.96 m/s.
Does a rock have potential and kinetic energy as it hits the ground?
When a ball is about to fall it has potential energy because of its height.
When a ball is about to hit the ground it still has some potential energy since it has't hit the ground yet, but much less than it had when it started falling.
What is 300km in miles per hour?
300 km/h = 186 mph
Here is the conversion formula
300 km*
1 mi
1.609344 km
=
186.4113577 mi
Yes, it is possible to change the translational kinetic energy of an object without changing its rotational energy. Translational kinetic energy depends on an object's linear velocity, while rotational energy depends on its angular velocity. By adjusting the linear velocity without changing the angular velocity, you can change the object's translational kinetic energy without affecting its rotational energy.
What is the potential and kinetic energy of a system with moving parts called?
The potential and kinetic energy of a system with moving parts is called mechanical energy. Potential energy is the energy stored in an object due to its position or state, while kinetic energy is the energy possessed by an object in motion. The sum of an object's potential and kinetic energy is its mechanical energy.
If 70 kg of mass is 3 m above the reference level, then its gravitational potential
energy is ( m x G x h) = (70) x (9.8) x (3) = 2,058 joules. Whether it happens to be
rising, falling, or stationary makes no difference.
To convert words per minute (wpm) to keystrokes per hour (kph), we multiply by 12. So, for 50 wpm, the calculation is 50 wpm * 12 = 600 kph.
Is debt a vector or scalar quantity?
debt is a scalar quantity. It is a single number - how much money you (or government, or whoever) owes
What does a horizontal line represent on a position vs time graph?
If time is along the horizontal axis, and speed up the vertical, then a horizontal line indicates that at all times the speed remains at a fixed value. Hence the object is travelling at a constant speed of v, where v is the height of the horizontal line.
Can kinetic energy be changed back to potential energy?
History
A roller coaster train going down hill represents merely a complex case as a body is descending an inclined plane. Newton's first two laws relate force and acceleration, which are key concepts in roller coaster physics. At amusement parks, Newton's laws can be applied to every ride. These rides range from 'The Swings' to The 'Hammer'. Newton was also one of the developers of calculus which is essential to analyzing falling bodies constrained on more complex paths than inclined planes. A roller coaster rider is in an gravitational field except with the Principle of Equivalence.
Potential Energy
Potential energy is the same as stored energy. The "stored" energy is held within the gravitational field. When you lift a heavy object you exert energy which later will become kinetic energy when the object is dropped. A lift motor from a roller coaster exerts potential energy when lifting the train to the top of the hill. The higher the train is lifted by the motor the more potential energy is produced; thus, forming a greater amount if kinetic energy when the train is dropped. At the top of the hills the train has a huge amount of potential energy, but it has very little kinetic energy.
Kinetic Energy
The word "kinetic" is derived from the Greek word meaning to move, and the word "energy" is the ability to move. Thus, "kinetic energy" is the energy of motion --it's ability to do work. The faster the body moves the more kinetic energy is produced. The greater the mass and speed of an object the more kinetic energy there will be. As the train accelerates down the hill the potential energy is converted into kinetic energy. There is very little potential energy at the bottom of the hill, but there is a great amount of kinetic energy.
Theory
When the train is at the top and bottom of the hill there is not any potential or kinetic energy being used at all. The train at the bottom of the first drop should have enough energy to get back up the height of the lift hill. The "Act of Faith" in riding these amazing rides which seems more of a phenomena that is only a theory. In practices, the train never could make it back up the hill because of dissipative forces. Friction and air resistance, and even possible mid-course breaks, are dissipative forces causing the theory to be changed but not destroyed. These forces make it impossible for the train to have enough energy to make it back up the lift hill's height. In the absence of the dissipative forces the potential and kinetic energies(mechanical energy) will remain the same. Since the mechanical energy is destroyed by the forces, the first hill is always the highest
What is final velocity minus initial velocity divided by time used for?
That expression represents average speed during the time.
What is the possible miles per hour of a kicked soccer ball?
If you kick a soccerball hard enough it would go 100 mph.
Does a golf ball on the grass have a potential energy?
Yes, a golf ball on the grass has potential energy due to its position in the Earth's gravitational field. When the ball is raised to a certain height, it gains potential energy which can be converted into kinetic energy when it is in motion.
Is kinetic energy dissapated into heat and energy?
Yes, kinetic energy can be dissipated into heat and other forms of energy through processes like friction and collisions. This is known as energy dissipation, where the initial kinetic energy of an object is converted into other energy forms due to interactions with its surroundings.
Is the kinematics equations true if acceleration is not uniform?
The answer is "No". If acceleration changes, forces of inertia should be taken to consideration. It requires dynamic equations of motion. However, if acceleration changes are not significant, you may continue using kinematics. To check if kinematic solution is within required precision limits you need to compare the solution of kinematic and dynamic equations and decide if kinematic solution is good enough.
What is 7.44 miles per hour in kilometers per hour?
7.44 miles per hour is equivalent to approximately 11.98 kilometers per hour.
What parts of a car use kinetic energy?
The wheels and engine components of a car use kinetic energy. When the car is in motion, kinetic energy is generated and transferred to these components to enable movement.
600 km per second is extremely fast. It is approximately 2.16 million km per hour or around 1.34 million miles per hour. At this speed, you could travel around the Earth's equator in just over 6 minutes.
How fast does the elevator travel in mph?
Elevators typically travel at speeds ranging from 500 feet per minute to 2,000 feet per minute, which is approximately 5 to 20 miles per hour. The speed can vary depending on the building's height and design.
How do you calculate the velocity of a moving object from two points on a position time graph?
First, note that velocity is a vector quantity. This means it has a magnitude (the speed) as well as a direction.
The magnitude of the velocity is the difference in position divided by difference in time. Hopefully, the direction should be evident from the graph.
Can kinetic energy and potential energy both increase when a gas filled balloon is rising in air?
Yes, both kinetic energy and potential energy can increase when a gas-filled balloon is rising in air. As the balloon rises, it gains potential energy due to its increased height above the ground. At the same time, the balloon also gains kinetic energy as it accelerates upward, increasing its speed.
