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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

Acceleration is defined as a change in velocity over time. if a runner increases velocity from 2 ms to 4 ma over a period of 20 seconds what is her acceleration?

The idea is that you should:

a) Calculate the change in velocity.

b) Divide this change by the time.

This gives you the average acceleration over the 20 seconds, in this case.

What speed is 2924 km in 43 hours?

To find the speed, divide the distance by the time: 2924 km / 43 hours = 68 km/h.

How do you find the time acquired by initial velocity in an acceleration -time graph?

To find the time taken to acquire a certain velocity in an acceleration-time graph, locate the point on the graph where the velocity reaches the desired value. Then, find the corresponding time on the horizontal axis at that point. This time value represents the time taken to acquire the initial velocity.

How long does it take to travel 20 miles at 30 mph?

200 feet = 0.0378787879 mile

Speed(miles/hours) * Time(hours) = Distance(miles) ------->

As you can see => miles/hours * hours = miles

-----------------------------------------------------------------------------

Therefore :

Distance = 0.037 miles

Speed = 50 miles/hours

Time = ?

Just substitute: 50 * Time = 0.037; ---------------> you get Time = 0.037/50 = 0.00074 hours

one hour is 60 minute: therefore : 60 * 0.00074 = 0.0444 minutes

one minute is 60 sec: 60 * 0.0444 = 2.664 sec ----> 2.664 sec

Derivative of kinetic energy?

The derivative of kinetic energy with respect to time is equal to the power (rate of change of energy) of the system. This can be found using the equation ( P = \frac{dE_{\text{kin}}}{dt} = F \cdot v ), where ( F ) is the force applied and ( v ) is the velocity of the object.

How many miles does it take to pass a truck at 60 mph with oncoming traffic?

It depends on the speed of the oncoming traffic and how fast the truck is traveling. To pass a truck at 60 mph with oncoming traffic, you need enough distance to safely move into the oncoming lane, pass the truck, and then merge back into your lane. It's essential to ensure you have clear visibility and enough space to complete the pass safely.

Why do you require velocity when you have speed?

Velocity provides information about both the speed and direction of an object, while speed only describes how fast an object is moving without indicating direction. This distinction is important in physics and engineering, as it allows for a more complete understanding of an object's motion.

Which acceleration has larger magnitude?

The acceleration with the larger magnitude is the one with a greater numerical value, regardless of its direction. Acceleration is a vector quantity, meaning it has both magnitude and direction, but when comparing magnitudes, only the numerical values are considered.

How fast is 160 kph in miles?

16 kph = about 10 mph (9.94193908 mph)

Is 696 meters per minute the same as 2088 feet per minute?

No, 696 meters per minute is not the same as 2088 feet per minute. To convert meters to feet, use the conversion factor 1 meter = 3.281 feet. So, 696 meters per minute is equivalent to approximately 2283 feet per minute.

How many mph is a 5.7 on the 40 yard dash?

A 5.7 second 40 yard dash is roughly equivalent to maintaining a pace of about 11 mph.

In physics what is variable acceleration and please give at least two examples of it?

Variable acceleration refers to an object's velocity changing by different amounts over time. This means that the object's speed is not changing at a constant rate. An example of variable acceleration is a car speeding up as it merges onto a highway, where the acceleration is increasing. Another example is a rocket slowing down as it enters the atmosphere due to air resistance, where the acceleration is decreasing.

When velocity is changing what is happening to the slope on a position versus time graph?

That slope is the 'speed' of the motion. If the slope is changing, then the speed

is changing. That's 'accelerated' motion.

(It doesn't matter whether the speed is growing or shrinking. It's still 'accelerated'

motion. 'Acceleration' does NOT mean 'speeding up'.)

How many drops per second are necessary to create a stream?

It depends on the flow rate of the stream. Typically, thousands of drops per second are needed to form a continuous stream visibly.

How fast is 250kph in mph?

155.34 mi

Algebraic Steps / Dimensional Analysis Formula 250 km*100000 cm

1 km*1 in

2.54 cm*1 mi

63360 in=155.3427981 mi

Direct Conversion Formula 250 km*1 mi

1.609344 km=155.3427981 mi

What does 40 kmph mean?

40 'kilometers per hour'. It is equal to 24.86 miles per hour.

Is it true that you find acceleration when initial velocity final velocity and time are given?

With that information, you can find the average magnitudeof the acceleration

during that period of time. You can't tell what either the magnitude or direction

were at any time during, only the average magnitude for the whole interval.

Is the inertia of a body equal to its mass?

Inertia is related to the mass, and it is proportional to the mass. When measuring things, you will usually measure the mass, not the inertia - but it basically amounts to the same. Just consider the mass to be what gives an object its inertia.

What happens to kinetic energy and potential energy of a car when it accelerates up a hill?

What happens to kinetic energy when your car stops at the end of the track?

It's all about energy?

The first question to ask yourself is," What stops your car?

Most people would say, "The brakes stop the car."

What happens to the brake as the car is stopped?

Due to friction, they heat up and the brake pads wear out?

What does it mean for brake pads to wear out?

The brake pads get thinner as they rub on the spinning rotor.

What causes them to get thinner?

The friction breaks the chemical bonds in the material of which they are made.

The Kinetic energy is converted into heat and used to break the bonds between the molecules in the material of which the brake pads are made.

If you push hard enough on the brake pedal, the tires will stop turning, and the car will skid to a stop. In this case, the tires will give off heat due to friction and the tires will wear thin as the chemical bonds between the molecules in the material of which they are made are broken.

Good site for explanation of brakes!

http://www.familycar.com/brakes.htm

What are kinematics when applied to secondary machining techniques?

Casting, forming, forging, extruding and molding are primary machining. Material removal and change of shape, drilling, grooving, dimensional corrections are some very special specific techniques, which are used in specialist workshops or machines are suppose to be the secondary machining, Turning, milling, drilling grinding, shaping are some of the secondary machining process. Chuck, face plate, vice, jigs, fixtures special centers are the work holding devices. Vernier calipers, micrometer, compactors, depth micrometers are some of the measuring tools using for secondary machining Turning, threading grooving, parting tools, milling cutters, taps drill bits, etc are cutting tools using for secondary machining techniques. Cutting speed, Speed, Feed rate, etc are the cutting parameters Inspections, verification, comparison, are the quality control methods in this kinematics. Assessments of health and safety measures are yet another kinematics in this technique.

What is 29 kph in mph?

29 kilometers per hour is equal to approximately 18 miles per hour.

How fast was Jackie Robinson in mph?

Jackie Robinson was known for his speed on the baseball field and was estimated to be able to run the 100-yard dash in 10 seconds. This would equate to a speed of approximately 18 miles per hour (mph).

When winds inside a tropical cyclone reach 74 mph what occurs?

When winds inside a tropical cyclone reach 74 mph, it is classified as a hurricane (Category 1) in the Atlantic basin and a typhoon in the Pacific. At this wind speed, a tropical cyclone becomes more organized and can cause damage to infrastructure and pose a threat to life and property.