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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 fast is 40 kilometers per hour in mph?
40 kilometers per hour is approximately 24.85 miles per hour (mph).
What is the kinetic energy of an object with a mass of 18 kg moving at 25 ms?
The formula for kinetic energy is KE = 1/2 x m x v2 where m is the mass measured in kg and v is the velocity measured in m/s.
We are given that m = 500.0 kg and that v = 35.0 m/s.
Thus, KE = 1/2 x 500.0 kg x (35.0 m/s)2 = 306250 J or 3.06 x 105 J if you are using significant figures.
(Note that 1 J = 1 kg m2/s2.)
How much distance traved in feet after 12 seconds at 87 miles per hour?
In 12 seconds, a car traveling at 87 miles per hour covers 211.2 feet. This is calculated by converting 87 miles per hour to feet per second, then multiplying by the time in seconds.
What does a straight line represent on a velocity time graph?
The steepness is usually referred to as the slope,usually being a fraction, like 5/2. The numerator represents the rise, and the denominator represents the run. Typically, this is remembered by rise over run. One must count, for this example, up 5 units and to the right 2 units to find the next point on the line.
m = 1kg
F1 = 20N
F2 = -12N
Fnet = 20N + (-12N) = 8N
Fnet = m•a
a = Fnet/m = 8N/1kg = 8m/s2
How fast was Barry Sanders in mph?
Barry Sanders ran a 40-yard dash in about 4.37 seconds, which would be roughly 20 mph. However, this speed may not accurately reflect his full top speed during a game.
Is the shape of a path followed by a projectile a parabola?
It isn't. Any projectile path is elliptical or round. One-half of an ellipse in polar coordinates mapped (not just converted) into Cartesian coordinates is a parabola. If you get this far, any projectile path on a spherical Earth's surface would be elliptical, but if you turned the Earth inside out, the path would be hypocycloidal. Hope this helps. ===========================================
??? An ORBIT is elliptical. But the behavior of an ordinary projectile over non-planetary distances is effectively that of an object launched at an angle with regard to a plane in a uniform gravitational field - over short distances the earth's surface is reasonably close to a plane and gravity acts essentially perpendicular to that plane. So, an object launched at an angle θ with a velocity of vo moves in two dimensions. It has a constant velocity vo * cos(θ) horizontally and a downward acceleration that's proportional to sin(θ) and the acceleration of gravity g.
The constant horizontal velocity means that the horizontal (x-axis) distance covered is directly proportional to the flight time, while the accelerating vertical velocity means the vertical (y-axis) distance is proportional to the square of the flight time. But that's exactly the relationship that describes a parabola; i.e. y = kx2
Does kinetic energy help sugar dissolve more quickly?
The kinetic energy is only very slightly involved in dissolving sugar. What is important is that stirring mixes the solution and the liquid close to the sugar will not get saturated because it is being mixed with all the other liquid. the grains of sugar will present more surface area to the solvent (they will be mixed up in it and not settle to the bottom of the mixing vessel) thus the grains will dissolve faster if they are stirred vigorously. The heat energy added to the solution from stirring plays a very minor role.
Does net force allows you to stand up from a chair?
Yes, the net force is needed to stand up from a chair. When you push against the chair with a force greater than the force of gravity pulling you down, the net force becomes positive and allows you to rise. Without a net force, you would remain seated.
Calculate distance from a velocity time graph?
The area between the graph and the x-axis is the distance moved. If the velocity is constant the v vs t graph is a straight horizontal line. The shape of the area under the graph is a rectangle.
For constant velocity, distance = V * time. Time is the x-axis and velocity is the y-axis.
If the object is accelerating, the velocity is increasing at a constant rate. The graph is a line whose slope equals the acceleration. The shape of the graph is a triangle. The area under the graph is ½ * base * height. The base is time, and the height is the velocity.
If the initial velocity is 0, the average velocity is final velocity ÷ 2.
Distance = average velocity * time.
Distance = (final velocity ÷ 2) * time, time is on the x-axis, and velocity is on the y-axis.
(final velocity ÷ 2) * time = ½ time * final velocity
...½ base * height = ½ time * final velocity
Area under graph = distance moved
Most velocity graphs are horizontal lines or sloping lines.
How to calculate distance from a velocity time graph?
You cannot since the graph shows displacement in the radial direction against time. Information on transverse displacement, and therefore transverse velocity, is not shown.
For example, there is no difference in the graph of you're staying still and that of your running around in a circle whose centre is the origin of the graph. In both cases, your displacement from the origin does not change and so the graph is a horizontal line. In the first case the velocity is 0 and in the second it is a constantly changing vector.
All that you can find is the component of the velocity in the radial direction and this is the slope of the graph at the point in question.
On what principle do most thermometers work?
As the temperature of the liquid in the thermometer gets hotter, the molecules move faster. As the molecules move faster, they produce greater pressure. The only free surface is the top. This greater pressure causes the liquid to expand, causing the liquid to rise in the thermometer.
A. When liquid absorbs heat it loses kinetic energy.
Kinetic energy = ½ * mass * velocity^2
When a liquid absorbs heat, the molecules move faster. Kinetic energy is proportional to the square of velocity of the molecules. So, since the molecules are moving faster, the liquid gains KE.
B As the temperature rises, the molecules in liquid move more slowly.
Temperature is the measure of the average Kinetic energy of the molecules of a substance. Let's determine what causes the temperature to rise. Suppose you half fill a small metal can with 50º F water, and place it in a pan with 120ºF water in it. The molecules of the 120ºF water are moving very fast. They collide with the atoms in the outer surface of metal can, making these atoms vibrate faster. As these atoms vibrate faster, hitting the atoms in the inside of the metal can harder, the atoms inside vibrate faster. These atoms in the inside of the metal can hit the molecules of the 50º F water, making these water molecules move faster. Since the water molecules of the 50º F water are now moving faster (greater velocity), they have more kinetic energy. So, the temperature of the water in the can is getting warmer. It is a chain reaction.
C kinetic energy causes temperature?
Temperature measures the kinetic energy.
Kinetic energy = ½ * mass * velocity^2
Kinetic energy measures the mass and velocity of atoms and molecules.
When the atoms are moving faster the temperature is higher.
202 mph is equal to approximately 325 kilometers per hour (kph).
In enquations imvolving velocity the traiangle symbol means?
In equations involving velocity, the triangle symbol typically represents the Greek letter "delta," which signifies a change in the given quantity. So, when you see the triangle symbol in a velocity equation, it usually denotes a change in velocity or acceleration.
At 500 mph, it would take an airplane 4 hours to fly 2000 miles.
20 minutes to drive between two towns average speed 45 miles per hour how far apart are these towns?
The distance between the two towns is 15 miles. This is determined by multiplying the average speed (45 miles per hour) by the time it takes to drive between the towns (20 minutes converted to hours is 1/3 hour). 45 miles/hour x 1/3 hour = 15 miles.
Explaine what happens to the velocity and the acceleration of an object in fall?
As an object falls freely under the force of gravity, its velocity increases at a constant rate due to acceleration. The acceleration of the falling object is constant and equal to the acceleration due to gravity, approximately 9.8 m/s^2. This means that each second, the velocity of the object increases by 9.8 m/s.
How does mass and speed effect kinetic energy?
Kinetic Energy is 1/2 mass x the square of speed (KE = 1/2 mv^2)
The kinetic energy of a falling object is directly proportional to the distance it falls.
But the distance is not directly proportional to the time in fall, so the KE is not directly proportional
to the time either.
What was the kinetic energy of each car before braking?
More information is needed. Once you have both the mass and the speed, you can calculate kinetic energy as (1/2)mv2 (1/2 times mass times speed squared).
More information is needed. Once you have both the mass and the speed, you can calculate kinetic energy as (1/2)mv2 (1/2 times mass times speed squared).
More information is needed. Once you have both the mass and the speed, you can calculate kinetic energy as (1/2)mv2 (1/2 times mass times speed squared).
More information is needed. Once you have both the mass and the speed, you can calculate kinetic energy as (1/2)mv2 (1/2 times mass times speed squared).
What fields of science study machines?
Fields of science that study machines include robotics, mechanical engineering, computer science, and artificial intelligence. These disciplines investigate the design, development, and functioning of machines to improve their efficiency, intelligence, and capabilities.
What is kinetic energy in the form of?
Kinetic energy is the energy an object possesses due to its motion. This form of energy can be in the form of mechanical energy, thermal energy, or electromagnetic energy, depending on the type of motion involved.
Are systems at lower potential energy more or less stable than systems at higher potential energy?
At lower energy, a system is more stable. At a higher energy, the system will have a tendency to achieve a lower energy. For example, a ball tends to roll down a slope, a compressed (or extended) spring tends to relax.
At lower energy, a system is more stable. At a higher energy, the system will have a tendency to achieve a lower energy. For example, a ball tends to roll down a slope, a compressed (or extended) spring tends to relax.
At lower energy, a system is more stable. At a higher energy, the system will have a tendency to achieve a lower energy. For example, a ball tends to roll down a slope, a compressed (or extended) spring tends to relax.
At lower energy, a system is more stable. At a higher energy, the system will have a tendency to achieve a lower energy. For example, a ball tends to roll down a slope, a compressed (or extended) spring tends to relax.
What characteristic is associated with potential energy rather than kinetic energy?
Position or height is a characteristic associated with potential energy rather than kinetic energy. The higher an object is positioned above the ground, the greater its potential energy.
Top speed of a 2010 Yukon XL Denali?
The top speed of a 2010 Yukon XL Denali is electronically limited to around 130-135 mph for safety reasons. It is important to adhere to speed limits and drive responsibly.
