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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
If s is the vector which denoted the position at time t, then the vector ds/dt is the required vector. Its magnitude is the car's speed and its direction is the car's.
How many mili liters in a liter?
Milligrams can't be converted to milliliters. Milligrams measure mass, while milliliters measure volume.
How do you apply torque on a pen if it stands vertically?
spin it. Torque is a rotational force applied to an object. It is measured on a tangent to the centerline of the rotation in force-distance from that center. ie: foot-pounds, newton-meter, etc..
relative velocity is defined as the time rate of change of one object with respect to another object.the relative velocity depends upon the observer i.e.if the velocities of two objects are same then the relative velocity also seems to be equal.
Is it possible to have a negative speed?
No, Speed is always greater than or equal to zero. However, velocity can be negative, which just means you have a positive speed in the opposite direction! (scalar(number) versus vector).
How many feet per second do you have to be walking to be going 60 mph?
You would have to be traveling at 88 feet every second to achieve 60 mph.
Are you sure you mean 10 miles per second? That is a speed of 36,000 mph (unless you are referring to the speed of the car relative to the orbit of the earth as the earth orbits the sun, but that is approx 19 miles per second).
I think you mean 10 metres per second (as you've used a metric measure for the mass of the car).
kinetic energy = ½ × mass × velocity²
→ KE = ½ × 1500 kg × (10 m/s)²
→ KE = 75000 kgm²/s² = 75000 Joules = 75 kJ
Which does a ball roll farther in grass or dirt?
Neither. The ball rolls faster on cement, not grass, or dirt.
These are two separate questions, but yes, barrel lenght and propellant affect the distance and accuracy of paintballs.
What are cons to legal Immigration?
Some cons of immigration is that the U.S. population increases, not educated and poor immigrants are lowering the GDP of the country, and is also lowering standard living in the United States.
Is kinetic energy always less than the potential energy?
no
Yes they can, in a solution of a single type of atoms, at absolute zero; This is the point at which something physically has zero energy (none in the molecules whatsoever), and there would be no potential energy in the bonds between molecules
What are balanced and unbalance net force?
The "net force" is the vector sum of all forces acting on an object.
"Balanced forces" means that the net force is zero.
"Unbalanced forces" means that the net force is non-zero.
Note that unbalanced forces on an object will cause an acceleration - the object's velocity will change.
CAN AN Object accelerate and be moving at a constant speed?
Yes, it's direction may be constantly changing which would mean it is still accelerating.
If you run a 40 in a 4.24 how is that in mph?
40 meters in 4.24 seconds equates to a speed of 21.1 miles per hour.
If a soccer ball is hit at 21 miles per hour then what is the balls speed in meters per seconds?
The ball's speed is 9.4 meters per second.
The vertical distance between the release point and the ground.
How can scientists determine the top speed of a bullet?
There are several possibilities to determine this velocity:
1 Use a highspeed camera and analyse the footage,
know how many frames / second were shot, and measure the distance travelled between frames.
2 What goes up, must come down:
If the mass of the bullet is known, shoot into the sky,
wait for it to fall, and measure the time it takes for the bullet to drop to the ground again. With some mathmatics you can estimate the initial speed of the bullet. (however due to air resistance it isn't the most accurate method, and a dangerous one at that :) )
3 U could also shoot into a pendulum, and look at how high it swings.
If the mass of the pendulum and bullet are known, the height they reached together is a measure for the maximum potential energy they had at that point. All this energy came from the kinetic energy of the bullet. And, since the mass of the bullet is assumed to be known, from this energy it's initial speed can be calculated.
If you're creative enough I'm sure you could find some other ways. Be aware that i don't know how, for example, forensic detectives determine the speed. Or other professionals for that matter. But "scientist" could be anything really ..., so there.
Hope this answer helps
AnswerThey set up a certain distance between the exit of the barrel and the target which is going to stop the bullet (nothing too long because gravity and air would slow the bullet down). They use equipment that measures how much time it takes for the bullet to hit the target. Add in some basic math and you have the top speed of a bullet.New comment
There is however, another way to determine the average speed of bullet. by simply firing the bullet at a target with te rifle perfectly horizontal, you can find out how far the bullet's height decreases. by finding this, one can determine how long it took for the bullet to traverse the distance between the rifle and the target. and with some clever maths (v^2=u^2+2as) one can determine the maxime velocity of the bullet.
How do you find diplacement in position time graph?
Usually time is the independent variable on the horizontal (or X) axis. Position or displacement is the dependent variable (that is, it's a function of time) on the vertical (or Y) axis. For any point on the curve, there will be an associated value for time, t, and a corresponding value for displacement, s. In other words, you can determine an object's position -- or displacement from the origin -- for any time, t. Going further, you can determine an object's speed, too. For any two points on the curve, (t1, s1) and (t2, s2), the speed can be calculated using the following formula: Speed = (s2 - s1) / (t2 - t1)
How many forces make up the net force?
However many there are exerted on the object. Usually there is gravity, friction, and another force exerted on the object.
