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Virty [35]
3 years ago
10

You attach a cart with a mass of 0.92 kg to a spring and compress the cart-

Physics
1 answer:
Artyom0805 [142]3 years ago
8 0

Answer:

F = - K X     force exerted by compressed spring

F X = 1/2 M V^2    energy (work) required to produce a speed V for mass M

K X * X  = 1/2 M V^2      direction of F is the same as that of V

X^2 = M V^2 / K      combining  terms

X = (M / K)^1/2 V      

X = (.92 / 130)^1/2 * 1.4 = .118 m

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A badger is trying to cross the street. Its velocity vvv as a function of time ttt is given in the graph below where rightwards
hjlf

The badgers displacement from its position at point <em>t </em>= 2, to its position at point <em>t </em>= 3 is 25 meters

<h3>Which method can be used to calculate the displacement of the badger?</h3>

The points on the graph are;

(0, 0), (1, 5), (3, -5), (6, -5)

The point <em>t </em>= 2 is between (1, 5) and (3, -5)

The slope, <em>m</em>, of the line containing the point <em>t </em>= 2 is therefore;

  • m = (-5 - 5)/(3 - 1) = -5

The equation of the line is therefore;

v - 5 = -5•(t - 1)

v = -5•t + 5 + 5 = -5•t + 10

v = -5•t + 10

At <em>t </em>= 2, we have;

v = -5×2 + 10 = 0

The velocity at <em>t </em>= 2 is 0 m/s

The value of the acceleration is the same as the slope, <em>m </em>= a = -5

Given that the initial velocity at <em>t </em>= 2 is 0, we have;

∆x = u•t + 0.5•a•t²

At <em>t </em>= 3, the time of travel from the time <em>t </em>= 2 is 1 seconds, which gives;

∆x = 0×5 + 0.5×(-5)×1² = -2.5

The distance traveled between points,<em> </em><em>t </em>= 2 and <em>t </em>= 3 is ∆x = -2.5, which is 2.5 meters in the direction opposite to the initial direction.

Learn more about the equations of motion here:

brainly.com/question/21010554

#SPJ1

5 0
2 years ago
An object in circular motion has velocity that is constantly changing. The direction of the acceleration is
Keith_Richards [23]
<h2>Answer: Toward the center of the circle.</h2>

This situation is characteristic of the uniform circular motion , in which the movement of a body describes a circumference of a given radius with constant speed.  

However, in this movement the velocity has a constant magnitude, but its direction varies continuously.

Let's say \vec{V} is the velocity vector, whose direction is perpendicular to the radius r of the trajectory, therefore   the acceleration \vec{a} is directed toward the center of the circumference.

 

7 0
3 years ago
Oil having a density of 924 kg/m 3 floats on water. A rectangular block of wood 3.79 cm high and with a density of 970 kg/m3 flo
Katena32 [7]

Answer:

x = 2.69 cm

Explanation:

We are given ;

Density of oil; ρ_oil = 924 kg/m³

Density of wood; ρ_wood = 970 kg/m³

h = 3.79cm

Density of water ( ρ_water) has a constant value of 1000 kg/m³

At equilibrium position, we have;

ρ_wood•g•h - ρ_oil•g•(h - x) - ρ_water•g•x = 0

This is because the density of oil is lower than that of water while density of wood is higher than that of oil but lower than that of water.

x is the distance below the interface between the two liquids is the bottom of the block.

Thus, let's make x the subject;

x = [(ρ_wood - ρ_oil)/(ρ_water - ρ_oil)] x h

Plugging in the relevant values to get ;

x = [(970 - 924)/(1000 - 924)] x 3.79

x = (54/76) x 3.79 = 2.69cm

5 0
4 years ago
A wave moving with a speed of 3.0 m/s has a frequency of 9 Hz. What is the wavelength of the wave?
Dovator [93]
From the question, we are told that:
Wave speed, V = 3.0 m/s
Wave frequency, F = 9 Hz.
The formula for calculating wavelength = V /F
Wavelength = 3 / 9 = 0.33 m.
The correct option is A.
6 0
3 years ago
1.
anastassius [24]

Answer:

from the formula of work done at any angle the formula is Force *distance cosα(tita)

7 0
3 years ago
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