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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 does the letters stand for in this formula PE equals mgh?
PE=MGH means the potential energy equals to the mass times the gravity times the height
What type of energy is velocity?
Velocity itself is not a form of energy. Velocity is a measure of how fast an object is moving in a specific direction. Energy associated with an object moving due to its velocity would be kinetic energy.
True or false Many people in many types of jobs not just physicists use kinematics ideas?
True. Kinematics, which is the study of motion without considering the forces that cause the motion, is a fundamental concept in physics. Many professionals in various fields, such as engineers, architects, animators, and even athletes, use kinematics ideas to analyze and design systems involving motion.
IS velocity possible in zero gravity?
Velocity is relative to the observer and or objects that are in the area , if your sitting in true zero gravity from your point of view you will be standing still but in-reality your velocity will based on your original thrust. Some one watching you (at a zero velocity) from another location might see you zoom by at the original velocity. So the new question is if that other person has zero velocity and is in zero gravity what time will it be when they look at their watch ? Hmmm
What type of energy is sound besidess potential and kinetic?
Sound energy is a form of mechanical energy, as it involves the movement of particles in a medium (such as air, water, or solids). Sound waves transmit energy through the vibration of these particles, creating longitudinal waves that can be heard by our ears.
There could be several reasons for the shaking, such as wheel alignment issues, tire balance problems, or suspension components that are worn or damaged. I recommend taking the van to a mechanic for a thorough inspection to diagnose and address the issue.
The four factors that influence contractile force are the number of muscle fibers stimulated, the relative size of the fibers, the frequency of stimulation and the degree of muscle stretch. Factors that influence the velocity and duration of contraction are the muscle fiber type, load and recruitment.
Why burning velocity decreases with increase in equivalence ratio?
When equivalence ratio increase, the actual air-fuel ratio decrease, which mean the mass flow rate of air is decrease. So, the volume flow rate of air is dercreasing and its mean the velocity is decreasing.
when your going up you will most likely weigh more.
when you are going down you will most likely weigh less.
a good example (for the going down) is skydiving while in the plane you accelerate to a certain speed and height. then you jump outside of the plane and once you jump from the plane and are in open air with nothing attaching you to the plane you are in free fall you will feel weightlessness. so on a scale that is moving the same speed as you while falling will most likely say you weigh nothing unless something is above you say the ceiling or someone else (or a huge thing everything knows as gravity) doesn't push you so as long as you don't push down on the scale while standing on top of it while the elevator is falling which i say don't do because you have to crouch onto the floor in order to survive. you will not weigh anything.
How can you tell if an object is accelerating?
You can tell if an object is accelerating if its speed is changing or if its direction of motion is changing. Acceleration is a vector quantity that includes both changes in speed and changes in direction.
The shouldn't be too difficult, but there's no way to start on it before seeing the
figure. That's the main reason they gave you the figure along with the question,
on the page you copied it from. I'm sorry you thought I deserved less.
If a lizard runs 30 feet in 3 seconds how fast is it running in miles per hour?
To determine the lizard's speed in miles per hour, we need to convert the units. Since there are 5,280 feet in a mile and 3,600 seconds in an hour, we can calculate the lizard's speed by multiplying (30 feet/3 seconds) * (60 seconds/1 minute) * (60 minutes/1 hour) * (1 mile/5,280 feet) to get approximately 20.45 miles per hour.
Describe the motion of a child on a swing using kinetic and potential energy?
When the child is up in the air on either side of the climax of the swing, it builds potential energy to drop or swing back down towards the other side. When the child falls, gravity and the potential energy work together to make the child fall, and in turn, the kinetic energy not used for the fall goes into pushing the child back up on the other side. Say that there was no gravity involved in this situation. The child would only make it to the bottom of the swing, closest to the ground, because the amount of energy you store up in going higher cannot be amounted to greater as you swing down.
How does a yo yo transfer both potential and kinetic energy?
The yoyo is a good example of how potential and kinetic energy can oscillate. When fully up and stationary it has zero kinetic and only potential, when it is fully down and rotating at max speed this energy has been converted to kinetic, then it climbs up again, and so on. The player has to keep providing a small input of energy to overcome friction losses.
The top speed of a 2009 KTM 150 XC is approximately 65-70 mph, depending on factors such as rider weight, terrain, and maintenance.
Do a search on "metric conversion" and you'll find tons of help
1 miles per hour is equal to how many kilometers per hour?
4.828032
The formula to convert 3 miles into km is
3 mi*
1.609344 km
1 mi
=
4.828032 km
The average kinetic energy of the molecules in an object is what law of thermodynamics?
The average kinetic energy of molecules in an object is governed by the first law of thermodynamics, which states that energy cannot be created or destroyed, only transferred or transformed. This is because the kinetic energy of molecules is a form of internal energy that is included in the total energy of the system.
On a speed time graph the slope measurses acceleration?
If an object is allowed to free-fall under gravity, it will accelerate downwards at 9.8 metres per second per second (m s-2). This is equal to the standard gravity, symbol g, which on the surface of Earth has a value of around 9.8 newtons per kilogram (N kg-1) or 9.8 m s-2. Both units are equivalent.
This is because the acceleration of an object is given by the net force that acts on it (in newtons) divided by its mass (in kilograms). This is Newton's second law:
F = m a
So a = F / m
In the case of a free-falling object, the only force acting on the object is gravity, and the magnitude of this force is the mass of the object multiplied by standard gravity.
F = m g
So the acceleration a = g, the standard gravity.
On the other hand, consider an object at rest on a horizontal surface. The force of gravity still acts on the object, but it is being counteracted by an upward force provided by the surface, which is equal and opposite to the force of gravity.
An object on a slope is somewhere between these two. Part of the force of gravity is counteracted by an upward force provided by the slope, but the remainder causes the object to accelerate down the slope (assuming the object is round or slippery). In fact we need to resolve the force into its components by using trigonometry.
To answer the question, if the slope is at an angle theta (θ) to the horizontal, then the acceleration is given by:
a = g sin(θ)
If the slope is perfectly horizontal then θ = 0, and sin (0) = 0, so a = 0, and the object does not move.
What happends to potential energy as a squashed ball regains its shape?
As a squashed ball regains its shape, the potential energy stored in the ball decreases. This potential energy is converted back into kinetic energy as the ball expands, causing it to bounce back to its original shape.
Is it scalar or vector when a car stops at a stop sign?
It is neither a scalar or a vector? Scalar and vectors are used to describe quantities, for example scalars include distance and mass, while vectors include weight and velocity. We do not say that a situation is a scalar or a vector.
Why do they call it 100 mph tape?
"100 mph tape" is a nickname often used for duct tape because of its versatility, durability, and ability to hold up even at high speeds like 100 mph. It is known for its strong adhesive properties and wide range of uses in emergency situations, repairs, and construction work.
Can we have physical quantities which have magnitude and direction but are not vectors if yes how?
yes we can have.
for eg electric current, pressure etc
though these quantities have both magnitude and direction their directions are not necessary to define them
and vectors are those quantities which has magnitude and requires direction to be defined
" quantities having both magnitude and direction is a vector" is not a corrrect definition ofa vector
Why current density is vector quantity?
Current is not scalar. Current is a vector quantity. For simplicity, in electric circuits, current is scalar because the direction is assumed to be one way or another, rather than three dimensional.
What would happen if a spherical volume of air instantaneously disappeared?
It depends on the size of the disappearing sphere. If a small sphere disappeared then air from adjoining space would move in and balance would soon be be restored. However, if a large sphere disappeared then the adjustment could involve extreme turbulence.
