Kinematics

According to the graph, at what time did the athlete's feet lose contact with the ground? Velocity (Y ) axis Time ( X) axis

During a jump the maxiumum velocity is acquired just right before you leave the group because thats when you are under the acceleration of gravity? Think about when during the jumping process a person has a maximum velocity. After a jumper loses contact with the ground the only significant force is gravity, which causes an acceleration of approximately −10m/s The maximum velocity of a person will be attained right before the person leaves the ground. Since the person's knees have a maximum velocity at time t=1.01.01, point, 0 seconds, that is the moment when the person is leaving the ground. Also, because the acceleration after 1.01.01, point, 0 seconds is -10 ​​ minus, 10, space, m, slash, s, start superscript, 2, end superscript we know that the person is in the air during that time accelerating only due to gravity.

Vivian

Excep that its for distance when you only have the final velocity (v) not intial velocity (v0) and the term 1/2 at^2 is subtracted not added

In an angle the mouth of the pacman is always ?

sin because sin theta is always the opposite side where the angle (pac man ) mouth opens to

positive slope

skii lift penguin being carried to the top

Velocity (Y ) axis Time ( X) axis graph What is the slope

slop = delta v/ delta t = acceleration

Position (Y ) axis Time ( X) axis graph What is the slope

slope = delta x / delta t = velocity

Same string same ____ and same ____.

tension and acceleration throughout the string while it has tension

Horizontal component of velocity in projectile kinematics

v inital = v final

Answer

you would see how long A, B, C, D take to reach the velocity of 2 m/sec. The orange one takes 2 seconds. The longest. It has the least steep slow therefore the smallest acceleration

velocity (y) versus time (x) graph. The horizontal axis on this graph represents the line where velocity is _________.

zero

What is the tension on a string that has gone slack

0

What is the area of a triangle

A= ½(height x base).

What is the differences between constant acceleration and increasing acceleration

Constant acceleration Slope remains the same and steady 1-2 sec the acceleration = 5 2-3 sec the acceleration = 5 3-4 sec the acceleration = 5 Increasing acceleration Slope increases 1-2 sec the acceleration = 5 2-3 sec the acceleration = 10 3-4 sec the acceleration = 15

distance =

d = v t = velocity x time

time =

distance / velocity

negative slope

downhill car

For jumping moving up means ______ velocity, moving down means ______ velocity. This could correspond to the axis of a velocity (y) versus time (x) graph.

For jumping moving up means positive velocity, moving down means negative velocity.

For a kidney stone what feature of its environment hinders movement?

Friction The pressure between stone and kidney helps pass the stone; the pressure between the bladder and stone prevents passing of the stone. Friction is opposing the passing of the stone. A greater normal force would increase the kinetic friction between the stone and the ureter, which would make it harder to pass.

Right side of the heart comes from and goes to?

Hook: right to the heart, Right side looks like a pair of angel wings that resemble lungs blood from the body goes to the heart and then to the lungs Right side looks like a pair of angel wings that resemble lungs

Displacement versus distance. What is measured in Kinematics equations?

Kinematics equations use displacement (d) Distance is the absolute value of total distance traveled Displacement is the distance and direction of an object's change in position from the starting point.

Does a positive slope in a velocity (y) and time ( t) graph mean that an object has a positive acceleration

No. You have to look at the velocity values

How much longer does it take the nerve pulse to travel the entire length of the sciatic nerve for person D as compared to person B?

So the difference between the two gives you the "how much longer"

Scalar versus Vector value

Speed is a scalar and velocity is a vector A vector has size and direction, so you would need to know the direction of the blood flow

MAKE HOOKS FOR WHAT THE KINEMATICS DONT HAVE THAT MATCHES FOR EXAMPLE

THE DIANE HAS NOT (X) DIANE HAS NOT SEX - THATS NOT A BAD HOOK

How do you find the distances in a velocity (y) versus time (x) graph.

The area under the interval is the distance traveled in that interval

At what time after emerging from the brush, does the cheetah catch the gazelle?

The area under the velocity vs. time graphs give the distance traveled by the animals. The cheetah will catch the gazelle when both animals have simultaneously traveled the same distance.

What is the displacement of a projectile that is launched and reaches the maximum height of 5 feet?

The pack travels up just as far as it falls down. Displacement is the difference between the final position and the initial position. The vertical displacement will be zero since the pack will end up at the same height it started at, so the horizontal displacement will be greater than the vertical displacement.

Imagine resetting the experiment, except you replace the black 5kg mass with a 1 kg mass. If you let go of the 1kg mass from rest, how would the masses move?

The table is frictionless. Since the table is frictionless, the only horizontal force on the 3kg mass will be the tension in the string. Since the 1kg mass will cause tension in the rope, and the tension is the only horizontal force on the 3kg mass, the masses will have to accelerate. So no matter what the weight of the 1 kg mass was. It would still move because of the tension being the only horizontal force?

What is the acceleration of the 3kg mass right after the 5kg mass hits the floor?

Think about Newton's First Law. Newton's First Law says that objects will maintain constant velocity unless acted on by an external force. After the 5kg mass hits the ground, the tension will drop to zero, which means there will no longer be a horizontal force on the 3kg mass. No force means no acceleration so the acceleration of the 3kg mass will be zero after the 5kg mass hits the ground. T = ma T slack means its zero = ma 0 = ma a = 0

While the athlete is in the air during his jump, how does the magnitude of the gravitational force exerted on the athlete due to the Earth compare to the magnitude of the gravitational force exerted on the Earth due to the athlete?

Think about Newton's third law. Newton's third law says that the force exerted on object A from object B, will be equal and opposite to the force on object B from object A. Because of Newton's third law, the gravitational forces will have the same magnitude.

During another time, the forces on the kidney stone are as F2= 0.035N and F1= 0.085N. With these forces, is it possible for the kidney stone to be moving towards the bladder?

Yes, but the kidney stone would have to be slowing down. Also keep in mind that acceleration doesnt always correspond to the direction of the motion Only net velocity is in the same direction of the motion.

What is Newton's Third Law

Use Newton's third law. Newton's third law says that every force has an equal and opposite force. Since the force from the fluid on the kidney stone is 0.06 N, then the force of the kidney stone on the fluid is 0.06N. This will cause a fluid force on the kidneys of 0.06 N.

acceleration kinematics in velocity (y) versus time (x) graph.

a = v final - v initial / time

Horizontal component of acceleration in projectile kinematics

a x= 0

Vertical component of acceleration in projectile kinematics

a y = 10 m/s^2 aka gravity

Newton's first law

an object at rest will stay at rest, an object that is moving will stay moving unless disturbed by an un balanced force.