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3 years ago

Will a roller coaster with a higher starting point be a faster ride? Why or why not

Physics

1 answer:

Brilliant_brown [7]3 years ago

8 0

Answer:

yez

Explanation:

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Define mechanics and describe its three major divisions

Andrew [12]

Mechanics is the branch of physics which deals with the study of motion of material objects.

Divisions

There are three major division of mechanics

Statics

Kinematics

Dynamics.

4 0

3 years ago

Each of the space shuttle's main engines is fed liquid hydrogen bya high-pressure pump. Turbine blades inside the pump rotateat

kvasek [131]

Answer:

a) $a= \frac{4 \pi^2 (0.02 m)^2}{0.00162 s}=9.74 \frac{m}{s^2}$

b) $k = \frac{9.8}{9.74}=1.006$

Explanation:

Part a

For this case we can begin finding the period like this:

$T= \frac{1}{w} =\frac{1}{617 rad/s}=0.00162 s$

Then we know that the centripetal acceleration is given by:

$a= \frac{v^2}{r}$

And the velocity is given by:

$v=\frac{2\pi r}{T}$

If we replace this into the acceleration we got:

$a = \frac{(\frac{2\pi r}{T})^2}{r}= \frac{4 \pi^2 r}{T^2}$

And we can replace the values and we got:

$a= \frac{4 \pi^2 (0.02 m)^2}{0.00162 s}=9.74 \frac{m}{s^2}$

Part b

For this case we want to find a value of k such that:

$a= k 9.8$

Where a = 9.74, so then we can solve for k like this:

$k = \frac{9.8}{9.74}=1.006$

8 0

3 years ago

The motorcycle travels with a constant speed v0 along the path that, for a short distance, takes the form of a sine curve. Deter

Alexandra [31]

Let at any instant of time the speed is vo and the angle made by the bike with the horizontal is given

now we have

component of speed in x direction given as

$v_x = v_0cos\theta$

component of speed in y direction will be

$v_y = v_0sin\theta$

now from above two equations we can say that here

$\theta$ = angle with the horizontal at any instant

and since here it is a sine curve so we know that

$y = sin(x)$

so we have slope of graph

$tan\theta = \frac{dy}{dx} = cos(x)$

6 0

3 years ago

What simple machines are used to create the shovel?

svetlana [45]

A shovel would classify as choice (A) because the head of the shovel is the wedge while the body of the shovel is the lever

4 0

3 years ago

Read 2 more answers

Is bleach heterogeneous

irga5000 [103]

No, bleach is not heterogeneous. Bleach is actually homogeneous.
Heterogeneous is if it the same throughout.
Homogeneous is if it is different (has chunks and clumps of different materials)

6 0

4 years ago