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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
The mass of an object in kilograms times its velocity is?
The mass of a object in kilograms times its velocity is its momentum.
How many feet per second does a car travel at 50 mph?
A car traveling at 50 mph covers 73.3 feet per second.
When you climb a rope you change potential energy onto kinetic energy?
When you climb a rope, you are converting potential energy (stored energy due to the height you are above the ground) into kinetic energy (energy of motion as you climb downward). Gravity is helping you in this process as it pulls you downward while you climb.
The amount of kinetic energy in a substance is called?
Vector Energy, mcV, it is not a scalar energy. The total energy is the sum of the scalar potential energy and the vector energy of motion. This combination is called Quaternion energy, E = -e1e2zc/2r + mcV.
When you stop at the top after climbing stairs have you gained kinetic energy?
You would not have gained kinetic energy if you were stopped because kinetic energy is energy of motion. However, there is always more than one way to look at a problem...
- If you climb to the top step you will be further (slightly) from the center of the earth. Being further away you will travel faster than you would nearer to the center because the earth rotates about its axis. You will travel a longer path during the same period of rotation. This presumes the steps that you are climbing are not located at either the north or south pole.
- You can look at the answer from a physiological perspective, too. If you just finished climbing the stairs, your heart will be pumping blood faster so, while not all of you is moving faster, at least part of you is.
How do you figure out net force for opposing forces?
If the opposing forces are pulling exactly opposite of each other, then take the difference of the magnitudes of the two forces (subtract the smaller value from the larger value), and the direction vector of the resultant force is in the same direction as the larger force.
What does the amount of kenetic energy that a moving object has depend on?
The kinetic energy of a moving object depends on its mass and its velocity. The formula for kinetic energy is 0.5 x mass x velocity^2. This means that both increasing the mass or the velocity of the object will increase its kinetic energy.
Whats the top speed of a Ninja 650?
It is probably around 105mph the spedometer on the 250 reads a little high once you get going that fast, once I was going downhill into the wind and it read 115, i was probably going 110. I was tucked behind the windsheild, and Im not a big guy.
The distance a book is from the floor can be calculated using the formula for gravitational potential energy: PE = mgh, where PE is potential energy, m is mass, g is acceleration due to gravity, and h is height. Given that the potential energy (PE) is 98 J, mass (m) is 10 kg, and acceleration due to gravity (g) is 9.8 m/s^2, you can solve for h to find the height the book is from the floor.
What does terminal velocity look like on a distance v time graph?
On a distance vs time graph, terminal velocity appears as a flat line after the initial acceleration phase. This flat line indicates that the object is moving at a constant speed and has reached equilibrium between the gravitational force pulling it downward and the air resistance pushing back up, resulting in no further change in speed.
761.2 mph at sea level, though it will vary depending on temperature and atmospheric composition.
Mach 1 is the speed of sound, approximately 768 miler per hour, but it will vary based on density of air, caused by humidity.
The unit Mach doesn't have a direct conversion to mph, because Mach 1 is the speed of sound (Mach 2 is 2 times the speed of sound etc.) and the speed of sound changes with altitude, while mph stay the same regardless of altitude and therefore causes the conversion between the two units to vary. For example, at sea level the speed of sound is 761.2 mph, but at 18 miles of altitude the speed of sound is 673.4mph. Got to the following webpage for a table of the speed of sound (Mach 1) at different altitudes.
Mach 1 or any other Mach number, is not a specific speed.
Mach numbers refer to the speed of sound in that medium.
Mach 1 is about 760 mph at sea level (+ or - 4-5 degrees depending on the temperature). Mach 1 decreases as you go to higher elevations.
At 30000 ft Mach 1 is 678 mph (589 knots, 1091 km/h) which is about cruising altitude for an average commercial airplane. (1 knot=1.15078 mph / 1 mph=0.868976 knots)
At what density altitude? Speed of sound slows with altitude. 761.05 mph at sea level on a normal day(60 degrees F, 29.92 barometric press.)
It changes with weather, atmospheric conditions and altitude. Most accept 657 miles per hour at 10,000 as the speed of sound.
What is the average speed when divided by 2 hours and 10 minutes into 720 miles?
The average speed is 332.31 miles per hour.
Yes, in a hydraulic system, when a larger piston is pushing on two smaller pistons, the force applied to the smaller pistons will be the same as the force applied to the larger piston, assuming the system is closed and incompressible. This is due to Pascal's law, which states that pressure applied to a confined fluid is transmitted undiminished in every direction.
What is a hamiltonian path in a graph?
A Hamiltonian path in a graph is a path that visits every vertex exactly once. It does not need to visit every edge, only every vertex. If a Hamiltonian path exists in a graph, the graph is called a Hamiltonian graph.
What is coeffitient of stactic n kinetic friction?
The coefficient of static friction is the ratio of the force required to move an object to the force pressing the surfaces together when the object is not moving. The coefficient of kinetic friction is the ratio of the force of friction between two objects in motion to the force pressing them together. Both coefficients are dimensionless values specific to the two surfaces in contact.
What is the difference between kinetic and potential enrgy?
Kinetic energy is the energy an object possesses due to its motion, while potential energy is the energy that an object has due to its position or state. Kinetic energy is dependent on an object's velocity, while potential energy is dependent on its height, position, or configuration.
Distinguish between potential energy from kinetic energy?
There are many kinds of potential energy but only one kind of kinetic energy.
Using gravitational energy as potential energy we get.
mgh=1/2mv2
simplifying gives
2gh=v2
it is a value unique for every spring and depends on the materials. it doesn't change if the characteristics of your spring don't. if we have a spring with k spring constant and cut it in 2, the resulting springs still have k spring constant.
the spring force depends on the spring constant. this formula F=k*x gives the force applied to a body by a spring, when it hase been pulled by x from it's natural state.
What is 400 feet in 52.4 seconds?
In order to translate feet and seconds into feet per second, all you have to do is divide the number of feet by the number of seconds. In this case, the answer is 7.634 ft/s
To double its kinetic energy, the object's speed should be increased to approximately 14.1 m/s. This is because kinetic energy is directly proportional to the square of the object's speed (KE = 1/2 * m * v^2). Doubling the speed quadruples the kinetic energy.
Can one object have more than one rotational inertia?
YES. Infact, an object can have infinitely different moment of inertias. It all depends on the axis about which it it rotating.
You can allow an object to rotate about any axis (this may or may not pass through the object).
How fast does the space needle's elevator go?
The Space Needle's elevator travels at a speed of 10 miles per hour, taking visitors to the observation deck in around 41 seconds.
If s = displacement, u = initial velocity, a = acceleration, t = time.
Then s = ut + 1/2at2 Be careful to keep units consistent
