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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
1 kilometer per hour is approximately equal to .6214 miles per hour.
Consequently, 209 kph is approximately 129.8726 mph.
What does the slope of distance versus time graph represent physically?
The slope of a distance versus time graph represents the speed or velocity of an object. A steeper slope indicates a higher speed, while a gentler slope indicates a slower speed. If the slope is negative, it means the object is moving in the opposite direction.
What is the converting of 90 per hour to dollars per minute?
To convert from dollars per hour to dollars per minute, divide the hourly rate by 60 (since there are 60 minutes in an hour). So, if 90 dollars are earned per hour, this would be equivalent to earning 1.5 dollars per minute (90 / 60 = 1.5).
When two bodies collide do they apply same force on each other?
Yes, according to Newton's Third Law of Motion, when two bodies collide, they apply equal and opposite forces on each other. This means that the force one body exerts on the other is equal in magnitude but opposite in direction to the force the other body exerts back.
256,000 kilometers per hour is approximately 159,072 miles per hour.
Why the area under a speed-time graph gives distancestan?
This is easier to understand when the graph is horizontal.
Speed is defined as distance / time. Rearranging the equation: distance = speed x time. In the graph, that would be proportional to the area of the rectangle under the (horizontal) speed line.
If speed is variable, the graph can be approximated by many small rectangles. The same reasoning as above applies to each one. This method - of separating an area into many small parts - is called "integration".
Why KEof body increase when its speed is double?
When the speed of an object is doubled, its kinetic energy increases by a factor of four. This is because kinetic energy is proportional to the square of the velocity. Therefore, doubling the speed results in four times the kinetic energy.
What is the speed in meters per second travelling at 20 knots?
20 knots is equivalent to approximately 10.29 meters per second.
What is 900 feet per day converted into yards per hour?
To convert 900 feet per day to yards per hour, we first need to find the equivalent value in yards for 900 feet. Since 1 yard is equal to 3 feet, 900 feet is equal to 300 yards. Next, we convert the rate from days to hours by considering there are 24 hours in a day. Therefore, 300 yards per day is equivalent to 12.5 yards per hour.
What happens to an object's potential energy as it gains kinetic energy?
As an object gains kinetic energy (movement), its potential energy decreases. This is because the energy is being converted from potential energy to kinetic energy. The total mechanical energy of the object (kinetic energy + potential energy) remains constant if no external forces are acting on the object.
450 knots is approximately equal to 518.34 miles per hour.
Is kinetic energy of a body in motion equals the product of half its acceleration?
No. Kinetic energy is 1/2 times mass times velocity squared - so as you can see, acceleration doesn't even enter the equation. If it accelerates, the speed will change, though, and so will its kinetic energy.
The "stored energy", or potential energy, will be converted to kinetic energy.
Example:
Let U = gravitational potential energy, K = kinetic energy
U = mgh, where m is mass, g is theaccelerationdue to gravity, h is the height
(there are other types of potential energy, but this is the most common example)
K = 1/2mv2, where v is velocity
Set U equal to K, because that potential energy will be converted to kinetic energy, minus any other factors that "steal" energy (i.e., friction):
U = K
mgh = 1/2mv2 <-- masses cancel
gh = 1/2v2
The left side of the equation represents stored energy. The right side represents kinetic energy. If we increase the left side by a factor of A, we must increase the right side by a factor of A as well (it's just an algebraic step):
A(gh) = A(1/2v2)
So it should be visible, that if you if you increase potential energy, you also increase kinetic energy (by the same proportion).
Ipsa Raman is a fictional character from the TV series 'The Good Fight'. She is a young lawyer who joins the firm at the beginning of the second season and quickly becomes a central character in the show. Ipsa is known for her intelligence, confidence, and sharp wit.
Can an object have a constant speed and the varying velocity at the same time explain?
Velocity is a vector. A vector has a magnitude and a direction. The scalar or magnitude portion of velocity is speed. Velocity is a constant only when both the speed and direction are not varying. Hence, when the speed is changing, the velocity cannot be a constant.
215 mph is equivalent to approximately 346 km/h or 94.7 m/s. This speed is extremely fast and typically associated with high-performance vehicles like sports cars or racing cars.
How do you develop the general velocity equation from a Velocity vs Time graph?
Derivitives of a velocity : time graph are acceleration and distance travelled.
Acceleration = velocity change / time ( slope of the graph )
a = (v - u) / t
Distance travelled = average velocity between two time values * time (area under the graph)
s = ((v - u) / 2) * t
What is the mph that breaks the sound barrier?
The speed of sound is approximately 767 mph, so any speed faster than that would break the sound barrier. Typically, speeds exceeding around 760-770 mph are considered supersonic.
White exhaust usually means that there is water in the combustion chamber and there is a crack somewhere. Pull out the dipstick and see if the oil is a milky white. If it is then you have either a cracked head or a cracked block. Heads cam be replaced somewhat affordable by a reputable mechanic, cracked block the engine is toast needs to be replaced.
Yes. For the object not to move, two conditions must be satisfied: (1) The vector sum of forces must be zero, and (2) The vector sum of torques must be zero.
Do some reading on torque, for more information.
How many mph does a rocket ship go?
Rocket ships can travel at speeds ranging from 25,000 to 36,000 miles per hour (40,000 to 58,000 kilometers per hour) depending on the mission and type of rocket.
Why is a rock on the top of a hill kinetic energy?
A rock on top of a hill has potential energy, not kinetic energy.
If it starts rolling down the hill then the potential energy transforms to kinetic energy.
Which is greater in positive acceleration initial or final velocity?
In positive acceleration, the final velocity is greater than the initial velocity. This is because acceleration is the rate of change of velocity, so as time progresses, the velocity increases due to the acceleration.
