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denis23 [38]
3 years ago
6

19 point please please answer right need help

Physics
1 answer:
dimulka [17.4K]3 years ago
6 0

Explanation:

We can write Newton's 2nd law as applied to the sliding mass m_1 as

T - m_1g\sin38 = m_1a\:\:\:\:\:\:\:(1)

For the hanging mass m_2, we can write NSL as

T - m_2g = -m_2a\:\:\:\:\:\:\:(2)

We need to solve for a first before we can solve the tension T. So combining Eqns(1) & (2), we get

(m_1 + m_2)a = m_2g - m_1g\sin38

or

a = \left(\dfrac{m_2 - m_1\sin38}{m_1 + m_2}\right)g

\:\:\:\:= 0.30\:\text{m/s}^2

Using this value for the acceleration on Eqn(2), we find that the tension T is

T = m_2(g - a) = (2.6\:\text{kg})(9.51\:\text{m/s}^2)

\:\:\:\:=24.7\:\text{N}

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Which of think following materials is the best is the best choice for an insulating material?
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7 0
3 years ago
You have a two-wheel trailer that you pull behind your ATV. Two children with a combined mass of 76.2 kg hop on board for a ride
marin [14]

a) The spring constant is 12,103 N/m

b) The mass of the trailer 2,678 kg

c) The frequency of oscillation is 0.478 Hz

d) The time taken for 10 oscillations is 20.9 s

Explanation:

a)

When the two children jumps on board of the trailer, the two springs compresses by a certain amount

\Delta x = 6.17 cm = 0.0617 m

Since the system is then in equilibrium, the restoring force of the two-spring system must be equal to the weight of the children, so we can write:

2mg = k'\Delta x (1)

where

m = 76.2 kg is the mass of each children

g=9.8 m/s^2 is the acceleration of gravity

k' is the equivalent spring constant of the 2-spring system

For two springs in parallel each with constant k,

k'=k+k=2k

Substituting into (1) and solving for k, we find:

2mg=2k\Delta x\\k=\frac{mg}{\Delta x}=\frac{(76.2)(9.8)}{0.0617}=12,103 N/m

b)

The period of the oscillating system is given by

T=2\pi \sqrt{\frac{m}{k'}}

where

And for the system in the problem, we know that

T = 2.09 s is the period of oscillation

m is the mass of the trailer

k'=2k=2(12,103)=24,206 N/m is the equivalent spring constant of the system

Solving the equation for m, we find the mass of the trailer:

m=(\frac{T}{2\pi})^2 k'=(\frac{2.09}{2\pi})^2 (24,206)=2,678 kg

c)

The frequency of oscillation of a spring-mass system is equal to the reciprocal of the period, therefore:

f=\frac{1}{T}

where

f is the frequency

T is the period

In  this problem, we have

T = 2.09 s is the period

Therefore, the frequency of oscillation is

f=\frac{1}{2.09}=0.478 Hz

d)

The period of the system is

T = 2.09 s

And this time is the time it takes for the trailer to complete one oscillation.

In this case, we want to find the time it takes for the trailer to complete 10 oscillations (bouncing up and down 10 times). Therefore, the time taken will be the period of oscillation multiplied by 10.

Therefore, the time needed for 10 oscillations is:

t=10T=10(2.09)=20.9 s

#LearnwithBrainly

7 0
3 years ago
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