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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 many miles per hour is a car traveling if it has traveled 28 miles in 30 minutes?
30 minutes is 1/2 of an hour, thus; 28*(1/2) = 56miles. The question asks how many MPH, so it will be 56MPH.
What is the horizontal acceleration of a projectile?
The horizontal acceleration i.e. Vx throughout the trajectory remains constant only of the air resistance is neglected. The gravity can affect the y-component of velocity but is unable to affect its x-component. Acceleration (delta V) does not occur unless a change comes into play per Newton. Gravity does not effect x but air resistance would. Likewise, projectiles launched from e.g. an explosion experience a reducing delta V in that acceleration from an explosion is subject to the inverse square rule.
Does correlation prove causality?
No. If Factor X is correlated to Factor Y then you can use one as a predictor of the other, but you should never assume that one causes the other (it may, but correlation alone doesn't prove it).
Consider the correlation between proximity to a swampland and chances of contracting malaria. Do swamplands cause malaria? No. Malaria is propagated via mosquitoes which of course love to live in swamplands. So your proximity to a swampland is a useful predictor of your chances of contracting malaria, but doesn't cause it.
Kinetic Energy is defined as the energy associated with motion. This is in contrast to potential energy which is associated with an entity's energy at rest, and it's potential for motion.
Kinetic Energy can be calculated using this formula:
KE = 0.5*Mass*Velocity^2, where KE = Kinetic Energy
It is apparent by the formula that the same car traveling at a higher speed will have a greater kinetic energy than it does when traveling at a lower speed. Therefore, when the car travels at 50 mi/hr it has a higher kinetic energy than when it travels at 35 mi/hr. Let me just note that if we were talking about two different cars then we'd have to consider the weights of the cars.
That means that the water either flows downstream, or falls down, depending on the case.
I may not have searched enough, but it looks as if this book isn't available for download. It isn't even available as a physical book, from Amazon - that is, Amazon lists it, but states that it is not available. I assume it is out of print.
What is the distance 324 miles divided by 5 hours 24 mins in mph?
60mph
as 5 hours 24 mins = 324 mins
so 324 miles in 324 mins
is 1 mile in 1 minute
or 60 miles in 1 hour.
What is meant when someone says that an athletic team has a lot of momentum or loses its momentum?
This is not a reference to momentum in the sense of physics - rather in the sense of psychology. In physics, a body with a lot of momentum has a lot of inertia and this allows it to overcome small obstacles without stopping. Similarly, a team that has been performing well gains a lot of confidence which may allow it to overcome small glitches in its performance. In that sense the team has got a momentum.
Conversely, after a series of poor performances, the team is said to have lost momentum - even a small upset is enough to stop its progress.
What does MPH stand for in psychiatry?
It could stand for several things, but the one that comes to mind is Masters in Public Health.
If a moving object slows down due to friction, its kinetic energy gets converted to kinetic energy of individual particles - that is, the objects involved in the friction, and the surroundings, heat up.
What is the NEET syllabus for 2020?
Hello Friends,
The question paper of NEET 2020 will consist of a total of 180 questions. 90 questions will be from the Biology section and 45 questions from the Physics section and the rest 45 questions from the Chemistry section.
I know biology syllabus. It follows.
The biology subject is divided into two parts i.e., contents of class XI syllabus and contents of class XII syllabus. The contents of class XI comprise of five units namely
Unit I: Diversity in Living World Unit II: Structural Organisation in Animals and Plants Unit III: Cell Structure and Function Unit IV: Plant Physiology Unit V: Human Physiology
The contents of the XII syllabus also comprise of five units, which are given below.
Unit I: Reproduction Unit II: Genetics and Evolution Unit III: Biology and Human Welfare Unit IV: Biotechnology and Its Applications Unit V: Ecology and environment
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Mach 1 (or the speed of sound) is 1,225km per hour
Mach 75 is there for 91,875 km/h
Kinetic energy is energy that is posessed by a moving mass.
Temperature is relative to the energy of the molecules?
Increasing temperature will increase molecular speed.An object with less massive molecules will have higher molecular speed at the same temperature.When kinetic temperature applies, two objects with the same average translational kinetic energy will have the same temperature. An important idea related to temperature is the fact that a collision between a molecule with high kinetic energy and one with low kinetic energy will transfer energy to the molecule of lower kinetic energy.
What would happen if a slide had high friction?
If a slide had high friction, it would not function well as a slide. Things would either slow down during their descent or would stop completely (if the coefficient of friction were sufficiently large).
You would either stop in mid slide, burn your bottom,
or shred the seat of your pants.
If you travel 360 feet in one second then how fast are you going in mph?
About 245.45 miles per hour at 360ft/s
What happens if you double velocity?
If you double velocity the speed increases by [itex] sqrt(2) [/itex]
You go twice as fast? The momentum is doubled? The KE is multiplied by four? OK, none of that works under some specific conditions. For example, if the initial velocity is zero, none of the above happens.
How many feet will it take you to stop your car if you going 60 mph?
Without knowing either the rate of negative acceleration or the time it takes for the car to stop, this question cannot be answered. There are three kinematic equations that could be used to answer this question. They are as follows:
d = (v_i)(t) + (1/2)(a)(t^2)
d = (v_i + v_f)/2 x t
V_f^2 = v_i^2 + 2ad, solve for d
In these equations, d is displacement, a is acceleration, t is time, v_i is initial velocity, and v_f is final velocity.
How will the momentum of a body changes if its Kinetic energy is doubled?
Let's see. Mass constant.
625000 Joules = 1/2(500 kg)V2
1250000 Joules = 500V2
2500 = V2
50 meters/second = velocity
====================================
The velocity doubles if KE doubles.
How fast is 1 mile in 21.851 seconds in mph?
1 hour = 3,600 seconds
so
1 mile in 21.851 seconds = 3600 / 21.851 = 164.75 miles per hour
What will be tension in string on which two forces of 1010N act horizontally?
You've specified that the two forces act horizontally, but you've said nothing about
how they're arranged relative to the string.
-- Are the forces pulling in opposite directions on opposite ends of the string ?
-- Are the forces both acting at the same end of the string, with the other end
tied to a wall ?
-- Are the forces in the same plane ? If so, is the string also in that plane ?
I can give you configurations in which the forces are horizontal, and the tension
in the string is anything you want between zero and 2,020 N.
In fact, if both ends of the string are fastened to walls, and the horizontal forces
push on the center of the string and perpendicular to it, then you can create any
tension you want in the string, up to the breaking limit of the walls.
What is the dimension of moment of force?
The SI unit is the newton-metre, the imperial the foot-pound. For more information please see the wikipedia article.
You need to use the formula to understand it. I will show you, but if you're still in school I STRONGLY recommend asking you professor to explain it to you so you fully grasp the reason.
A moving electron has kinetic energy K1 . After a net amount of work W has been done on it, the electron is moving one-quarter as fast in the opposite direction.Find W in terms of K1!!!
---------------------------------------------------------------------------------------------
K1
= 1/2 mv1^2 <--by definition
v2 = -v1/4 <-- given in the question that the final velocity is a fourth of the initial velocity
but opposite in direction.
K2 = 1/2 mv2^2 (when I say v1 and v2 I mean first and final velocity) By definition
Substituting v2 = -v1/4 for the formula of final kinetic energy
(to leave it in terms of K1)
K2 = 1/2 mv1^2/4^2 = 1/2 mv1^2/16 = 1/16 K1 <-in terms of K1
By definition W = ∆K
W = ∆K = K2 - K1 = 1/16 K1 - K1 = -15/16 K1 is the total work in terms of K
A dummy error refers to the error made in an optical level that is used in construction and surveying.
