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3 years ago

He wrote a book of aerobics

Physics

2 answers:

vampirchik [111]3 years ago

4 0

Answer:

George Washington

Explanation:

ifk

GaryK [48]3 years ago

3 0

Answer:

kenneth H. cooper sorry i need 20 mores letters

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A child slides down a hill on a toboggan with an acceleration of 1.8 m/s^2. If she starts at rest, how far has she traveled in :

DENIUS [597]

Explanation:

It is given that,

The acceleration of the toboggan, $a=1.8\ m/s^2$

Initial speed of the toboggan, u = 0

We need to find the distance covered by the toboggan. Using the second equation of motion as :

$s=ut+\dfrac{1}{2}at^2$

At t = 1 s

$s=\dfrac{1}{2}\times 1.8\times 1^2$

$s_1=0.9\ m$

At t = 2 s

$s=\dfrac{1}{2}\times 1.8\times 2^2$

$s_2=3.6\ m$

At t = 3 s

$s=\dfrac{1}{2}\times 1.8\times 3^2$

$s_3=8.1\ m$

Hence, this is the required solution.

4 0

4 years ago

In the afternoon, Adam rides his bike from his home to the mall to pick up a job application.Then he rides back home to take a n

garri49 [273]

Answer:

The magnitude of Adam's displacement is 0 m

Explanation:

Given;

Adam's distance from his home to the mall, d₁ = 1100m

then, his distance from the mall back to his home, d₂ = 1100m

Adam's displacement is given by;

Displacement = final position - initial position

Adam's displacement = d₂ - d₁

Adam's displacement = 1100 m - 1100 m = 0 m

Therefore, the magnitude of Adam's displacement is 0 m

6 0

4 years ago

Question 3 (1 point)

FrozenT [24]

The force of friction is equal to the pushing force, and the acceleration is zero

Explanation:

In this problem, we are pushing a piano along the floor, in the horizontal direction.

There are 2 forces acting in the horizontal direction on the piano:

The applied force, $F_a$ , acting forward
The force of friction, $F_f$ , acting backward

Therefore, the net force in the horizontal direction is

$\sum F = F_a - F_f$

According to Newton's second law, the net force is equal to the product between the piano's mass (m) and its acceleration:

$\sum F = ma$

Combining the two equations,

$F_a - F_f = ma$

However, we are also told that the piano moves at constant speed, therefore the acceleration is zero:

$a=0$

And so,

$F_a - F_f = 0\\F_f = F_a$

which means that the force of friction is equal to the applied force.

Learn more about Newton's second law:

brainly.com/question/3820012

#LearnwithBrainly

3 0

3 years ago

4. There is a flashing yellow light at the intersection you are approaching. What does the flashing yellow light indicate, and w

OleMash [197]

It indicates that you should proceed with caution. You should slow down and be prepared to stop to safely navigate this intersection.

4 0

4 years ago

Alarge plate is fabricated from a steel alloy that has a plane strain fracture toughness of 82.4 MPa m1/2. If the plate is expos

Korvikt [17]

Answer:

minimum length of a surface crack is 18.3 mm

Explanation:

Given data

plane strain fracture toughness K = 82.4 MPa m1/2

stress σ = 345 MPa

Y = 1

to find out

the minimum length of a surface crack

solution

we will calculate length by this formula

length = 1/π ( K / σ Y)²

put all value

length = 1/π ( K / σ Y)²

length = 1/π ( 82.4 $10^{3/2}$ / 345× 1)²

length = 18.3 mm

minimum length of a surface crack is 18.3 mm

4 0

3 years ago