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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 is the Emergency Highway Energy Conservation Act?

The Emergency Highway Energy Conservation Act was a law enacted in the United States in 1974 in response to the oil crisis. It aimed to conserve fuel by establishing a national speed limit of 55 mph on highways and promoting fuel-efficient driving practices. The act was repealed in 1995.

What is energy and how is it different from kinetic energy?

Energy is the capacity to do work or produce heat. Kinetic energy is a type of energy associated with the motion of an object. While energy is a broad concept that encompasses various forms like kinetic, potential, and thermal energy, kinetic energy specifically refers to the energy of motion.

When an object is lifted 12 feet off the ground it gains a certain amount of potential energy if the same object is lifted 36 feet off the ground its potential energy is?

The potential energy of an object can be calculated using the simple formula

Potential Energy = mass*acceleration due to gravity*distance above ground.

For simplification, we can call the mass m and the acceleration g. Using these values, the object will have a potential energy of 12m*g when it is 12 feet off the ground. When it is 24 feet off the ground, it will have an energy of 24*m*g. This is nothing more than twice the value we calculated before, so we can say that the object's potential energy at 24 feet is twice its potential energy at 12 feet. In order to give an exact value, we would need to know the mass of the object as well.

A man hoists himself up in a basket The combined mass of the man and basket is 95 kg With what force magnitude must the man pull on the rope if he is to rise with a constant velocity?

The man must pull with a force equal to his weight plus the weight of the basket, which is 95 kg * 9.8 m/s^2 ≈ 931 N. Since he is rising with constant velocity, this force must also counteract the force of gravity pulling him down.

How fast is 50 kilometers per hour?

type this in google "50 kph in mph" and you will have your answer. you can do that with most any common units of measurment, cool huh?

Is the kelvin temperature of a substance directly proportional to the total kinetic energy of the particles in the substance?

Yes, the Kelvin temperature of a substance is directly proportional to the average kinetic energy of the particles in the substance. The higher the temperature in Kelvins, the higher the average kinetic energy of the particles.

Convert 64 mPh to kilometers per hour?

To convert from meters per hour (mPh) to kilometers per hour (km/h), you need to divide by 1,000.

So, 64 mPh is equal to 0.064 km/h.

Who lowered the speed limit to 55 miles per hour?

The U.S. government lowered the speed limit to 55 miles per hour during the 1970s energy crisis in an effort to conserve fuel. This nationwide speed limit was part of a broader strategy to reduce oil consumption and dependency on foreign oil.

What are types of motion?

Types of motion include linear motion (movement in a straight line), circular motion (movement in a circular path), rotational motion (spinning or rotating around a central point), and oscillatory motion (repetitive back-and-forth motion).

If this acts on an object the object will change speed and direction?

You mean a force I guess. A force acting on an object will make it accelerate or decelerate, and if it is acting at an angle to the existing line of motion will make it change direction.

What is the conversion from 93miles per hour to meters per second?

To convert 93 miles per hour to meters per second, you can use the conversion factor:

1 mile per hour is approximately equal to 0.447 meters per second.

Therefore, 93 miles per hour is approximately equal to 41.61 meters per second.

Is the energy an object have due to its movement or position called mechanical energy?

The energy that an object have due to its movement or position is called the mechanical energy. The total mechanical energy of an object is equal to the sum of the potential energy and kinetic of an object in an instant. The potential energy is dependent on the height from the ground and the mass of the object; Kinetic energy is dependent on the mass and the velocity of the object.

Is calories a scalar or a vector quantity?

well, by definition vector is something that has both direction and magnitude, in this case weight is only countable when gravity exists, and of course gravity has direction

direction for vector doesnt have to be like north, south or within the plane because vectors are free and can be moved anywhere without changing its magnitude.

What happens to the speed of body when kinetic energy increase by four times?

When the kinetic energy increases by four times, the speed of the body will double. The relationship between kinetic energy and speed is not linear, but rather quadratic. So if the kinetic energy increases by four times (2^2), the speed will increase by two times (2).

What is the formula for vibrational kinetic energy?

Vibrational kinetic energy is the energy due to vibrational motion :)

How fast must a 2.0 kg basketball be thrown to start with a kinetic energy of 160 J?

The formula for kinetic energy is KE = 0.5 * m * v^2, where KE is kinetic energy, m is mass, and v is velocity. Rearranging the formula to solve for velocity, we get v = sqrt(2 * KE / m). Plugging in the values (KE = 160 J, m = 2.0 kg), we find that the basketball must be thrown with a velocity of approximately 8 m/s.

When a jumbo jet slows and descends on approach to landing there is a decrease in both its kinetic and potential energy Where does this energy go?

The decrease in kinetic and potential energy of the jumbo jet as it slows and descends on approach to landing is converted into other forms of energy such as heat and sound due to air resistance, and work done by the engines to counteract gravity and maintain the descent rate.

A 1.20 x 103 kg car accelerates uniformly for 15.0s from rest During this time the car travels 176m north What is the net force acting on the car during this acceleration?

To find the net force acting on the car, we can use Newton's second law: [ F = ma ] where ( m = 1.20 \times 10^3 , \text{kg} ) and ( a ) can be calculated from the kinematic equation: [ d = \frac{1}{2} at^2 ] Given that the car starts from rest, the initial velocity is 0, so ( a = \frac{2d}{t^2} ). Substitute the values and solve for ( F ) to find the net force acting on the car.

Is coal potential or kinetic energy?

Coal contains potential energy, which is energy that is stored within an object based on its position, composition, or state. When coal is burned, it releases this stored energy in the form of heat and light.