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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

What are the five kinetic energies?

The five kinetic energies are translational energy (movement from one place to another), vibrational energy (vibrations within a molecule or crystal lattice), rotational energy (spinning or rotating motion), electrical energy (movement of electrons in a conductor), and sound energy (vibrational energy transmitted through a medium).

Is acceleration equal to the initial velocity minus the final velocity and then divided by time?

No, acceleration is calculated as the change in velocity divided by time. It is the rate at which the velocity of an object changes. Mathematically, acceleration is represented as (final velocity - initial velocity) / time.

Why does speed happen?

Speed is the rate at which an object covers distance. It happens when an object moves across a distance in a specified amount of time. Speed can be influenced by various factors such as the force applied, resistance, and the mass of the object.

How fast is 12km in mph?

12 km per hour is about 7.456 MPH.

What will increase the effective energy of the xray beam?

Increasing the kilovoltage (kV) or mAs (milliamperage per second) will increase the effective energy of the x-ray beam by producing higher-energy photons. This can result in better penetration through the body and improved image quality. Additionally, filtering out low-energy photons can also increase the effective energy of the x-ray beam.

Why would a bullet pierce a mirror without breaking it?

A bullet may pierce a mirror without breaking it if it hits the mirror at a very acute angle or if the mirror is made of toughened material that can absorb the impact without shattering. The angle of impact and the velocity of the bullet both play a role in determining whether the mirror breaks or not.

Is momentum a conserved quantity?

Yes, momentum is a conserved quantity in closed systems where no external forces act. This means that the total momentum before an interaction is equal to the total momentum after the interaction. This principle is known as the law of conservation of momentum.

Is kinetic energy easily lost?

Kinetic Energy - this is the energy which came from the different radiation . the best example is MAGNET there is a popular energy that can attract to other materials and different metalic objects

From: JayRica

When is acceleration equals half of the sum of initial and final velocities?

If you have a particle with constant acceleration, and you add the initial

and final velocities and then divide them by two, what you get is the average

velocity of the particle in that period of time.

How do you find kinetic friction without the coefficient?

You can find the kinetic friction force by measuring the normal force acting on the object and the net force experienced by the object when it is in motion. By applying Newton's second law (F = ma), where a is the acceleration of the object, you can calculate the kinetic friction force without knowing the coefficient.

What is the mass of an object with a potential energy of 980 J and a height of 5 meters?

To find the mass of the object, we first need to determine the gravitational potential energy formula, which is PE = mgh (mass x gravity x height). Given the potential energy (PE) as 980 J and height (h) as 5 meters, solve for mass (m) using the formula. The mass of the object would be 40 kg.

How fast are you running if you run 328 yards in 1.25 minutes?

To determine speed, you must convert minutes to hours. 1.25 minutes is equivalent to 0.02083 hours (1.25 minutes ÷ 60). Divide the distance (328 yards) by the time in hours (0.02083 hours) to find the speed. Thus, the speed is 15732 yards per hour.

When is the shape of an position versus time graph parabolic?

If a position versus time graph is parabolic, then:

  • Speed versus time is a straight line.
  • Acceleration (magnitude) vs time is a horizontal line, so the acceleration is constant.

The graph of height/time for a stone or a baseball

tossed upward is an inverted parabola.

How many feet per second is 20 mph?

20 mi/h * (1 h / 3600 s) * (5280 ft / 1 mi) = 29.33 ft/sec

How would you categorize the energy found in the food eat kinetic or potential?

Potential Energy is energy that could come from something that if it were to fall (say, from gravity) the kinetic energy gained from that fall would be equal to that. Other forms could be elastic potential energy, chemical potential energy, electrical potential energy (eventually becomes voltage), and etc.

Kinetic energy is of an object that is moving (because I assume we're talking of Newtonain motion).

Do boats have a high or low friction?

Boats usually have low friction (drag) compared to freight trains, but they have considerably more drag than most aircraft, especially the really fast ones. The faster the boat or aircraft, the lower the friction.

Does kinetic energy in a collision cause the car to be damaged or destroyed and the occupant injured or killed?

That depends on how much kinetic energy is present, as well as the design of the car and the type of impact. Specifics?

It depends on Speed of collision and what you mean by destroying. I would say extreme damage is destruction. Otherwise it is only destroying the shape. But remember real destruction never takes place as things take a different shape and still remains..

What is 324 kmh in mph?

324 km/h is approximately 201 mph. This conversion can be calculated by multiplying the speed in kilometers per hour by 0.621371.

How is 4 knots calculated in km?

To convert 4 knots to kilometers per hour, you can use the conversion factor of 1 knot is approximately equal to 1.852 kilometers per hour. Multiply 4 knots by 1.852 to get the equivalent speed in kilometers per hour, which would be about 7.408 km/h.

Where watts indicator mechanism use?

Watt indicator mechanisms are commonly used in steam engines to measure the power output of the engine in watts. This helps engineers monitor the efficiency and performance of the engine and make adjustments as needed. Watt indicator mechanisms typically consist of a pressure gauge and a crank mechanism to measure the pressure and power output of the steam engine.

Is the acceleration of an object proportional to its weight?

No, acceleration is not directly proportional to weight. Weight is the force of gravity acting on an object, while acceleration depends on the net force acting on the object, which can be influenced by factors other than weight, such as friction or applied forces.

What is the Ek - kinetic energy - of a soccer ball which has a mass of 1 kg and is kicked at a velocity of 10m per s?

The kinetic energy (Ek) of the soccer ball can be calculated using the formula: Ek = 0.5 * mass * velocity^2. Plugging in the values, Ek = 0.5 * 1 kg * (10 m/s)^2 = 50 J. The kinetic energy of the soccer ball is 50 Joules.