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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 do you plot a distance time graph when you are given a velocity time graph?

The area under a v/t graph is how far you've gone. Choose a point on the time axis, read off the speed and find the area underneath. If its a straight line graph, all you have to do is find the area of the triangle. This area is the distance travelled in this particular time. Repeat for several more points on the time axis. Plot distance against time.

What makes golf balls bounce?

Because when it hits the ground its momentum makes it continue to fall for a fraction of a second causing the part touching the ground to collapse slightly (depending on how hard the ball is). The collapsed part then straightens itself out again rapidly, flicking the ball up as a bounce.

How fast is 22.5 knots in mph?

22.5 knots = about 26 mph (25.8925376 mph)

Why is the body moving with a uniform velocity is zero?

The body is not zero, but the sum of all forces on it is.

-- "Uniform velocity" means no acceleration.

-- Acceleration is force/mass .

-- If acceleration is zero, that's an indication that force must be zero.

In a closed system energy is equal to potential energy plus kinetic energy?

Mechanical energy is equal to potential energy plus kinetic energy in a closed system. The total mechanical energy is conserved.

How can force be calculated?

V2 X W divided by 2G or 64. Or, Velocity squared times Weight of the object (in motion) divided by 2 Gravity or 64 equals the force of impact of the object in motion.

How long will it take to travel 126.2 at 37.2 miles per hour?

It takes 3 hours 24 minutes to travel 126.2 miles at 37.2 miles per hours

What is the relationship between stream erosion and kinetic energy?

It is direct, and the amount of stream erosion increases, kinetic energy increases also.

What is the top speed of a Yamaha Grizzly 125 ATV?

a Yamaha main dealer said it was 35mphbut after i got my mates mechanic to take a look and up rate some of the linkages and throtle cabels and stuff it now does a minimum of 45 mph

Why is the term energy is closely linked with the idea of force and motion?

Mechanical energy is equal to force x distance. Actually, work is defined this way, but you can think of work as a transfer of mechanical energy.

Is power of the object moving with constant force and velocity can be meaured?

Please slow down. A few points need to be clarified here:

-- There's no such thing as "moving with constant force".

-- If the object exerts a force on something else, or a constant force acts

on the object, then the object can't move with constant velocity. It must

accelerate.

-- A moving object has energy, but it doesn't have 'power'. Power is the rate

at which energy is moving, or changing, or being used. If the object is moving

with constant velocity, then its energy is not changing.

-- If its energy is changing, then its velocity, or position, or temperature is changing.

Either the object is transferring energy to something else (like brakes), or something

else is transferring energy to the object (like an engine). Either way, the rate at

which power is exchanging between the object and something else is the power.

But there's no such thing as "power of the object".

Now, what was it you were saying ?

The energy of the object can be calculated, if we either know or measure its mass,

electric charge, altitude, speed, temperature, etc.

What are the five different forces?

The five different forces are the derivatives of the Quaternion Energy

E=Es + Ev=[Es,Ev]

where Es is the Scalar Energy and Ev the vector Energy.

Force = XE = [d/dr,Del][Es,Ev] = [dEs/dr -Del . Ev, dEv/dr + Del Es + DelxEv]

dEs/dr the scalar derivative of the Scalar Energy, the Scalar Centripetal Force

Del.Ev the Divergence of the Vector Energy, the Scalar Centrifugal Force

dEv/dr the scalar derivative of the Vector Energy, the Vector Tangent Force

Del Es the vector Derivative of the Scalar Energy, the Vector Gradient Force

DelxEv the Curl of the Vector Energy, the Vector Circulation Force.