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3 years ago

9

I need help, please help an object starts from rest at time t=0 and moves in the with constant acceleration. The object travels

3m from time t=1 to time t=2. what is the acceleration of the object?

1 answer:

vichka [17]3 years ago

4 0

<span>a=8(m/<span>sec2</span>).. i answered this earlier i think.</span>

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A plane has a speed of 275 km/hr. The wind is at a 70 degree angle to the direction of the plane with a speed of 75 km/hr. What

8090 [49]

The combined speed of the plane and the wind is 249.35 km/h.

<h3>Relative speed</h3>

The relative speed of the plane due to speed of the wind is calculated as follows;

Let the direction of the plane be horizontal direction.

<h3>Speed of the wind</h3>

The speed of the wind is calculated as follows;

$V_b = V \times cos\theta\\\\V_b = 75 \times cos(70)\\\\V_b = 25.65 \ km/hr$

<h3>Combined speed</h3>

The combined speed of the plane and the wind is calculated as follows;

V = 275 km/h - 25.65 km/h

V = 249.35 km/h

Thus, the combined speed of the plane and the wind is 249.35 km/h.

Learn more about relative speed here: brainly.com/question/17228388

6 0

2 years ago

A chair of weight 70.0 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F =

Annette [7]

Answer:

94.67 N

Explanation:

Consider a free body diagram with force, F of 41 N applied at an angle of 37 degrees while the weight acts downwards. Resolving the force into vertical and horizontal components, we obtain a free body diagram attached.

At equilibrium, normal reaction is equal to the sum of the weight and the vertical component of the force applied. Applying the condition of equilibrium along the vertical direction.

$\begin{array}{l}\\\Sigma {F_y} = 0\\\\N - W - F\sin \theta = 0\\\\N = W + F\sin \theta \\\end{array}$

Substituting 70 N for W, 41 N for F and $\theta$ for 37 degrees

N=70+41sin37=94.67441595 N and rounding off to 2 decimal places

N=94.67 N

6 0

4 years ago

Why do women typically tend to have slightly greater stability than men?

Pani-rosa [81]

Women have lower centers of gravity, and lower centers of gravity provide more stability.

The correct option is C.

<h3>What is centre of gravity with example?</h3>

The location in a system or body where the weight is equally distributed and all sides are in balance is known as the center of gravity. The middle of a seesaw is an illustration of a center of gravity. the center of mass of an object in a gravitational field that is uniform.

<h3>How can you improve your center of gravity?</h3>

Training your legs and lower body is essential since they contain the biggest muscles in your body, as any competent bodybuilder or strength athlete will tell you. Exercises like squats, lunges, and calf raises should be a regular part of your workout routine if you want to reduce your center of gravity.

To know more about center of gravity visit:

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3 0

1 year ago

A neutron is confined in a one-demensional potential box of width 5.0 x 10^-15 m. Calculate the minimum kinetic energy of the ne

kvv77 [185]

Answer:

$E_1=1.31\times 10^{-12}\ J$

Explanation:

Given that,

Width of a one dimensional potential box, $x=5\times 10^{-15}\ m$

The energy of a particle in one dimensional box is given by :

$E_n=\dfrac{n^2h^2}{8mx^2}$

h = Planck's constant

m = the mass of the proton

For minimum kinetic energy, n = 1

$E_1=\dfrac{(6.63\times 10^{-34})^2}{8\times 1.67\times 10^{-27}\times (5\times 10^{-15})^2}$

$E_1=1.31\times 10^{-12}\ J$

So, the minimum kinetic energy of the neutron is $1.31\times 10^{-12}\ J$ . Hence, this is the required solution.

8 0

3 years ago

Which of the following is the best reason for using a scanning electron microscope?

torisob [31]

Answer is C: Ability to see three-dimensional images of the surfaces of object

Explanation:

To enable the technician see fractures and broken particles in a better resolution as the SEM sees the peaks and valley of the structure.

8 0

3 years ago