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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

Energy due to position and motion?

Energy due to position is potential energy, which is stored energy an object has because of its position in a force field. Energy due to motion is kinetic energy, which is the energy an object possesses due to its motion. Both forms of energy are important in understanding the behavior of objects and systems in physics.

In an isolated system Bicycle 1 and Bicycle 2 each with a mass of 30 kg collide Bicycle 1 was moving to the right at 2 m' s while Bicycle 2 was moving to the left at 4 m's What is the magnitude o?

In an isolated system, momentum is conserved. The total initial momentum is the sum of the momentum of Bicycle 1 and the momentum of Bicycle 2. Given the masses and velocities of the bicycles, you can calculate their momenta and add them together to find the total initial momentum of the system.

Do changes in velocity and mass have the same effect on kinetic energy?

Kinetic energy is equal to one half the mass times the square of the velocity. Thus, changes in velocity and mass do not have the same effect on kinetic energy. If you increase the mass by a factor of 10 at the same velocity, you increase the kinetic energy by a factor of 10. However, if you increase the velocity by a factor of 10 at the same mass, you increase the kinetic energy by a factor of 100.

What is a kinematics equation that uses acceleration final velocity distance and time but not initial velocity?

There is no ready equation, but you can derive one using the three known kinematic equations.


Using the general notations:

u = initial velocity

v = final velocity

a = acceleration

s = distance

t = time


v = u + at

Hence, u = v - at


v2 = u2 + 2as

Hence, substituting the value of u from above,

v2 = (v - at)2 + 2as

v2 = v2 -2vat + a2t2 + 2asÂ?

2vt = at2 + 2s Â? Â? Â? Â? Â? Â? Â? Â? Â? Â? Â? Â? Â? Â? Â? Â? Â? .......(Cancelling v2 and dividing by a)


How fast is 148 kilometers per hour?

85 km/h is the same as about 52.8 miles per hour.

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.

Explain how the maximum height is related to the maximum potential energy?

This question makes sense in the context of something like a pendulum. At the top of its swing, a pendulum is at maximum height, is not moving and so has zero kinetic energy, and has maximum potential energy since all its energy is potential. As it falls, it gradually moves with increasing speed, so its potential energy is being converted to kinetic energy. At the bottom of the swing, it is moving at maximum speed, and all its energy is kinetic, none is potential, Then it starts to move upwards again, and its kinetic energy is gradually converted back to potential energy.

Suppose you apply a 10-N force to a 10-N cm's piston in a hyraulic devise if the force is transmitted to another piston with an area of 100 cm's by how much will the force be multiplied?

The force will be multiplied by the ratio of the areas of the two pistons. In this case, the ratio of areas is 100 cm^2 / 10 cm^2 = 10. Thus, the force on the second piston would be 10 N * 10 = 100 N.

What is 13 knots?

13 knots is a unit of speed used in navigation and aviation, equal to 13 nautical miles per hour. It is commonly used to measure the speed of watercraft and aircraft.

Gives a pictorial indication of how far and object has moved?

A distance-time graph can provide a pictorial indication of how far an object has moved. The slope of the graph represents the object's speed, where a steeper slope indicates faster motion. The area under the curve on the graph represents the total distance traveled by the object.

Is the acceleration due to gravity always pointing vertically downward even for an object whose velocity is vertically upward?

Yes, the acceleration due to gravity always points vertically downward, regardless of the direction of an object's velocity. This is because gravity is a force that attracts objects towards the center of the Earth.

Why does a person's kinetic energy decreases as they enters water?

When a person enters water, they must displace water molecules, which requires energy. This energy is taken from the person's kinetic energy, causing it to decrease. Additionally, water resistance slows down the person's movement, further reducing their kinetic energy.

If a rock falls from a cliff for 9 seconds how fast is it going when it reaches the bottom?

Assuming that no net external forces are taking place, such as friction or air resistant, the only force acting upon the falling rock would be gravity. Using one of the kinematic equations, we can solve for the final velocity of the rock:

v(final) = v(initial) + at

We can substitute 0 for "v(initial)" since the rock is starting from rest. We can also substitute 9.81 meters per second squared for "a", which is the gravitational acceleration on Earth. Finally, we can substitute 9 seconds for "t". This gives us:

v(final) = 0 + (9.81)(9)

v(final) = 88.29 meters per second.

If you have a 2kg pendulum bob that is 6 meters above the ground at its high point and 1 meter at its low point how can you figure the kinetic energy?

Calculate the potential energy at its highest point. Don't use the 6 meters above the ground - use the 5 meter difference from the lowest point. This part of the potential energy gets converted into kinetic energy, when the pendulum is at its lowest point. Just assume that all the potential energy (for the 5 meters difference) get converted into kinetic energy.

Calculate the potential energy at its highest point. Don't use the 6 meters above the ground - use the 5 meter difference from the lowest point. This part of the potential energy gets converted into kinetic energy, when the pendulum is at its lowest point. Just assume that all the potential energy (for the 5 meters difference) get converted into kinetic energy.

Calculate the potential energy at its highest point. Don't use the 6 meters above the ground - use the 5 meter difference from the lowest point. This part of the potential energy gets converted into kinetic energy, when the pendulum is at its lowest point. Just assume that all the potential energy (for the 5 meters difference) get converted into kinetic energy.

Calculate the potential energy at its highest point. Don't use the 6 meters above the ground - use the 5 meter difference from the lowest point. This part of the potential energy gets converted into kinetic energy, when the pendulum is at its lowest point. Just assume that all the potential energy (for the 5 meters difference) get converted into kinetic energy.

Suppose a mercury thermometer shows that the air temperature is 22celcus 72 farenheightdo particles in the air have more average kinetic energy than particles in the mercury?

Yes, particles in the air have more average kinetic energy compared to particles in the mercury. This is because the air temperature is higher than the temperature of the mercury inside the thermometer, so the air particles are moving faster on average.

300000 kph equals what mph?

300,000 kph is approximately equal to 186,411 mph. This conversion can be done by multiplying the kph value by 0.621371.

If a marble is in a tube starting as potential energy and turns into kinetic energy but the marble goes in a loop and goes to a stop what type of energy is that called?

You have converted potential energy to kinetic and then back to potential. If the marble came back exactly to its starting point you would have invented perpetual motion, but in fact it will lose a little energy in friction against the tube so it will gradually lose energy and eventually just stop at the lowest point of the tube.

What is study of velocity speed and acceleration called?

The study of velocity, speed, and acceleration is called kinematics. Kinematics is a branch of physics that deals with the motion of objects without considering the forces causing the motion.

Is kinetic energy a form of energy in the earth's system?

No, not at all. Kinetic energy is energy related to movement - any moving object has kinetic energy; at low (non-relativistic) speeds, the kinetic energy is calculated as 0.5 x mass x velocity squared.

No, not at all. Kinetic energy is energy related to movement - any moving object has kinetic energy; at low (non-relativistic) speeds, the kinetic energy is calculated as 0.5 x mass x velocity squared.

No, not at all. Kinetic energy is energy related to movement - any moving object has kinetic energy; at low (non-relativistic) speeds, the kinetic energy is calculated as 0.5 x mass x velocity squared.

No, not at all. Kinetic energy is energy related to movement - any moving object has kinetic energy; at low (non-relativistic) speeds, the kinetic energy is calculated as 0.5 x mass x velocity squared.

The rest energy of a pion is 140 MeV what is the kinetic energy when it moves at 0.80c?

total energy

E=gamma*m*c^2

where gamma = 1/sqrt(1-v^2/c^2)

K=E - mc^2 = (gamma-1)*(Rest Energy)

You know v, and can thus compute gamma, and you know the rest energy.

As a planet approaches perihelion does it potential energy increase or decrease?

At perihelion, the planet is closer to the Sun, and moves faster, that means that the potential energy is at a minimum, and the kinetic energy at a maximum. The sum of kinetic + potential energy, of course, remains constant.

At perihelion, the planet is closer to the Sun, and moves faster, that means that the potential energy is at a minimum, and the kinetic energy at a maximum. The sum of kinetic + potential energy, of course, remains constant.

At perihelion, the planet is closer to the Sun, and moves faster, that means that the potential energy is at a minimum, and the kinetic energy at a maximum. The sum of kinetic + potential energy, of course, remains constant.

At perihelion, the planet is closer to the Sun, and moves faster, that means that the potential energy is at a minimum, and the kinetic energy at a maximum. The sum of kinetic + potential energy, of course, remains constant.

What is the speed in km pH if you travel 1km in 1minute?

If you travel 1 km in 1 minute, your speed is 60 km/h. This is because there are 60 minutes in an hour, so covering 1 km in 1 minute translates to 60 km in 60 minutes, which is 60 km/h.