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Gnom [1K]
3 years ago
7

A 5.00 kg crate is suspended from the end of a short vertical rope of negligible mass. An upward force F(t) is applied to the en

d of the rope, and the height of the crate above its initial position is given by y(t)=(2.80 m/s)t +(0.61 m/s^3)t^3.
(a) What is the magnitude of the force F when 4.10s ?
(b) is the magnitude's unit N but the system doesn't accept it?
Physics
1 answer:
Goshia [24]3 years ago
8 0

Answer:

122.2

Explanation:

From the question, the equation of the force acting on the crate is,

F-mg = ma

F = ma+mg ........................ Equation 1

Where F = upward force, m = mass of the crate, a = acceleration of the crate, g = acceleration due to gravity of the crate.

Given: m = 5.0 kg, g = 9.8 m/s²

And a,

a = d²y/dt²

Where,

y(t) = 2.8t+0.61t³

d²y/dt² = 3.66t................... equation 2

when  t = 4.0 s.

substitute into equation 2

d²y/dt² = a = 3.66(4)

a = 14.64 m/s²

substitute into equation 1,

F = 5(14.64)+5(9.8)

F = 73.2+49

F = 122.2 N.

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When only several competitors in an industry maintain most of the sales of those items, it is considered a(n) Industry of Social
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Answer:

Oligopoly

Explanation:

An oligopoly is the structure of the market that is characterized by the domination of a few firms or industries. Other small firms also operate in the same market, but the power concentration is associated with few firms only. Interdependency among the firms helps in planning and strategy making to introduce new ideas to increase the market activities. The competition in the market is reduced when a few of the firms dominate the market. It results in an increase in the price of commodities.

8 0
3 years ago
A thin layer of liquid methylene iodide (n = 1.756) is sandwiched between two flat, parallel plates of glass (n = 1.50). What mu
Harrizon [31]

Answer:

t = 96.1 nm

Explanation:

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2\mu t - \frac{\lambda}{2} = N\lambda

here we know that

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t = thickness of layer

N = 0 (for minimum thickness of layer)

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now we have

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3 years ago
When a high-mass star explodes, which of the following is left over in the center?
il63 [147K]
I would say option D, it depends on the size of the star
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3 years ago
Suppose that you can throw a projectile at a large enough v0 so that it can hit a target a distance R downrange. Given that you
NikAS [45]

Answer:

Theta1 = 12° and theta2 = 168°

The solution procedure can be found in the attachment below.

Explanation:

The Range is the horizontal distance traveled by a projectile. This diatance is given mathematically by Vo cos(theta) t. Where t is the total time of flight of the projectile in air. It is the time taken for the projectile to go from starting point to finish point. This solution assumes the projectile finishes uts motion on the same horizontal level as the starting point and as a result the vertical displacement is zero (no change in height).

In the solution as can be found below, the expression to calculate the range for any launch angle theta was first derived and then the required angles calculated from the equation by substituting the values of the the given quantities.

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Can someone please help me
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ANSWER:
C. Small, minimize

Hope it helps u!
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