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4 years ago

Periodic Motion Problem, how to tackle this beast?

1 answer:

4 0

You can see the periodic motion as the projection over the diameter of a point moving with a circular motion.

The Amplitude will be the radius of the circumference and ω is the angular frequency (or speed) for both motions.

In the periodic motion, you will have maximum velocity at the center and it will be zero at the extremities, where the projection changes direction, while the acceleration will be maximum at the extremities and zero at the center.

The displacement will then be:
x(t) = A · cos(ωt)
And from this (using a little bit of calculus):
v(t) = A · ω · sin(ωt)
a(t) = A · ω² · cos(ωt)

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A tissue is made of a group of similar what working together

matrenka [14]

Cells.

When you have a group of similar cells, you make tissues. This is like having many specialized muscle cells grouping together to make a muscle tissue that can then make something like a bicep.

3 0

3 years ago

A car of mass 1200 kg is traveling at 2 m/s. Then it collides with a heavy boulder in the road. During the collision, the car mo

olga2289 [7]

Answer:

F = 1.6*10⁴ N

Explanation:

Given distance x = 0.15m, mass m = 1200kg, velocity v = 2m/s.

Unknown: force F

Force is given by Newton's law:

(1) $F = ma$

The average force to stop an object from a velocity will be the same force necessary to accelerate an object from rest to the same velocity.

The distance for an object starting from rest for a constant acceleration is given by:

(2) $x=\frac{1}{2}at^2$

The velocity for an object starting from rest for a constant acceleration:

(3) $v=at$

Using equation 2 and 3 to eliminate time t:

(4) $x=\frac{1}{2}a\frac{v^2}{a^2}=\frac{v^2}{2a}$

Solving equation 4 for the acceleration a:

(5) $a=\frac{v^2}{2x}$

Using equation1 to solve for the force F:

(6) $F=ma=\frac{mv^2}{2x}$

4 0

4 years ago

A small car has a head-on collision with a large truck. Which of the following statements concerning the magnitude of the averag

Veronika [31]

Answer:

The small car and the truck experience the same average force.

Explanation:

The average net force will be the resultant force of the average forces of both vehicles. On collision, they'll both experience the same impact force, but the deceleration and deformation felt by the individual vehicle will be proportional to the mass of the vehicle. This is why it will seem like the car will have more force but is not actually so.

4 0

3 years ago

Porfavor alguem precisso já disstoo

s344n2d4d5 [400]

translate it to English so that we also know the meaning

3 0

3 years ago

If an object falls from rest and lands 3.2 seconds later, how many meters did it fall

DIA [1.3K]

Answer:

50.2 meters

Explanation: