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xz_007 [3.2K]
3 years ago
5

Suppose the initial kinetic energy and final potential energy in an experiment are both zero. What can you conclude?

Physics
2 answers:
faltersainse [42]3 years ago
4 0
At the beginning it is not moving and at the end it is on the ground or the bottom of a hill.
puteri [66]3 years ago
3 0

Answer:

That an item is neither moving nor staying still in a position that is building up energy.

Explanation:

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gulaghasi [49]

Answer:

B

Explanation:

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2 years ago
Phương trình trạng thái tổng quát của khí lí tưởng diễn tả là​
tatyana61 [14]

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pV/T=const goodluke

6 0
2 years ago
An aircraft has a mass of 3.30 x 105 kg. At a certain instant during its landing, its speed is 45.2 m/s. If the braking force is
melamori03 [73]
Ultraconservative the future and I have been working with the following questions.
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3 years ago
The Car That Ran On Chocolate Achieve 3000 - Go On Achieve go to physical science scroll down untill you see The Car That Runs O
worty [1.4K]

Explanation:

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5 0
3 years ago
A spring of negligible mass has force constant of 1600 Newtons per meter. (a) How far must the spring be compressed for 3.20 Jou
frez [133]

Answer:

a) x=63.0 x10^{-3} m or 6.3cm

b) x=116.0 x10^{-3} m or 11.6cm

Explanation:

a).

The elastic potential energy is modeling by equation :

U1=\frac{1}{2}*k*x^{2} \\K=1600 \frac{N}{m}\\ U=3.2J\\m=1.2kg\\x^{2}=\frac{2*U}{k}\\x=\sqrt{\frac{2*3.2J}{1600 \frac{N}{m}}} \\x=\sqrt{4x10^{-3} m^{2}}\\ x=0.06324m

b).

The work energy theorem explain which work is done in this case. the motion began from the rest so K1=K2 equal zero, Ug1 is no yet done and U2is also zero because is the potential energy

Ug=K2\\mgy=\frac{1}{2}*k*x^{2} \\but \\y=h+x=0.80m+x\\m*g*(0.80m+x)=\frac{1}{2}*k*x^{2}

Solving for x

2*(m*g(h+x))=k*x^{2} \\k*x^{2}-(2*m*g*x)-(2*m*g*h)=0\\1600x^{2} -2*1.2kg*9.8\frac{m}{s^{2}}*x-2*1.2kg*0.80m=0\\1600x^{2} -23.52x-18.816m=0

x=-\frac{b+/-\sqrt{b^{2}-4*a*c } }{2*a} \\x=-\frac{-23.52+/-\sqrt{-23.52^{2}-4*1600*-18.816 } }{2*a} \\x=11.79 +/- 173.9\\x1=-0.10 m\\x2=0.116

The negative is discard so

x=0.116m

7 0
3 years ago
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