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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 can a trucks kinetic energy can be increased without increasing its speed?
Drive alongside it in another vehicle and then move stuff onto the truck. This will increase the mass of the [whole] truck and so increase its KE. This is dangerous so do not try it!
Mph stands for miles per hour, which is a measurement of speed.
What are the effects of potential energy and kinetic energy to 3 states of matter?
Kinetic energy effects changes of state because it is when energy that has been held up inside the object (aka potential energy), is finally released.
For example: On a roller coaster, the cart goes up a hill. At the top of the hill, right before it is about to go down another hill, it has potential energy, or stored up energy. Then whe it is going down the hill, all the energy is released and now the energy is in the form of kinetic.
Another example: A marble is attached onto the end of a string. You pull the marble back. While being held back, the marble has potential energy. When you let the marble go, that energy turns into potential energy, because it is in motion.
Defintions:
Potential energy: Energy that is stored up
Kinetic energy: Energy in motion
Does a baseball flying through the air have kinetic energy because its in motion?
The energy related to the movement is called "kinetic energy". Presumably, the moving baseball would be above ground level, so it would also have gravitational potential energy - assuming you choose to define the ground level as zero.
It depends on air pressure and temperature, or altitude. On a sea level it will be around 9120 mph, on 36000ft it will be 7900 mph.
What happens to an objects kinetic energy as its mass increases?
kinetic energy, K.E = 1/2 mv^2
that is, it is directly proportional to mass, assuming velocity to be constant
and is directly proportional to square of velocity assuming mass to be constant.
What type of energy is kinetic and potential?
Kinetic energy is the energy of motion, possessed by an object in motion. Potential energy is the energy that an object has due to its position or state, such as gravitational potential energy or elastic potential energy.
Which is a characteristic of projectile motion?
One characteristic of projectile motion is that the object follows a curved path under the influence of gravity. This motion can be divided into horizontal and vertical components that are independent of each other. The object’s velocity changes due to the constant acceleration from gravity.
Which is the average kinetic energy of a particles in an object?
The average kinetic energy of particles in an object is directly related to the temperature of the object. As temperature increases, the average kinetic energy of the particles also increases. This is because temperature is a measure of the average kinetic energy of the particles in an object.
1 knot = 1 nautical mile per hour
1 nautical mile = 1,852 meters
1 statute mile = 1,609.344 meters
16 knots = 16 nautical miles per hour = 29,632 meters per hour = 18.41 mph (rounded)
How many mph is 280 kilometres per hour?
1 kilometre = 0.621371192 miles
280 kilometres = 173.98393376 miles
When can an object a constant speed but not a constant velocity?
If the velocity is constant there is no acceleration. Speed is not velocity, velocity has speed and direction. I A car going around a circular track at 60 mph keeps the same speed but changes direction and thus accelerates at a constant speed.
Velocity is speed in a certain direction.
So change the speed but keep direction the same and you change the velocity.
or
Change the direction while keeping the speed the same and you change the velocity.
If the speed is constant, any change of direction is a change in velocity. Driving around in a circle is a case of constantly changing direction.
What happens to a substance when you remove kinetic energy?
When you remove kinetic energy from a substance, its particles slow down. If enough kinetic energy is removed, the substance may transition from a gas to a liquid or a solid, depending on the substance.
How far can you travel at 45 mph?
Speed = distance/time
You have been given the speed and time. You need to find distance. In order to determine the distance, you must rearrange the equation for speed by multiplying both sides of the equation by time, isolating distance. Then plug in your known values and solve for distance.
Speed x time = distance
47mph x 1/2h = 23.5 mi
How many feet per second are in 90mph?
90 miles/hour (5280 feet/1 mile)(1 hour/3600 seconds)
= 132 feet per second
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This can be modeled as a "collision" where momentum is conserved. Momentum equals mass times velocity (p = mv).
Let's call the momentum of the student before the collision ps0 and the momentum of the skateboard before the collision pb0. Let's call the momentums after the collision ps1 and bs1.
Since momentum is conserved, ps0 + pb0 = ps1 + bs1. Plugging the numbers for the momentum gives us:
(45)(3) + (m)(0) = (45)(2.7) + (2.7)(m), where m is the mass of the skateboard.
Simplified:
135 = 2.7m + 121.5
13.5 = 2.7m
m = 5
So the mass of the skateboard is 5 kg.
(Note that the units are all in kilograms, meters, and seconds they call match up in the calculations.)
If the ball's motion is in the horizontal direction, not far at all. So, let's assume you mean the ball's motion is entirely in the vertical direction, and the 50 joules represents the kinetic energy of the ball. If the 50 joules is all kinetic and the ball is heading upward, it will reach its highest point when its kinetic energy is zero and its potential energy due to gravity is at its greatest. At that point all the kinetic energy will have been turned into potential energy, so when the ball is at its apex, its potential energy will be 50 joules. The formula is pretty simple: Ep = mgh. In English, the potential energy, Ep, is the product of the mass, the acceleration due to gravity, and height. So, 50 = 2 * 9.8 * h. Solving for h gives you h = 2.55 meters.
You have a right triangle and can use trig. Degree mode.
tan(theta) = adjacent/opposite( y component )
tan( 60 degrees) = (5 m/s)/(y comp.)
y component = 5 m/s)/(tan 60 degrees)
= 2.887 m/s ( you can call it 3 m/s )
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What is kinetic energy in chemistry?
In chemistry, kinetic energy refers to the energy associated with the movement of particles. It is related to temperature, with higher temperatures leading to greater kinetic energy and faster particle movement. This energy is important in chemical reactions as it affects the rate at which reactions occur.
