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2 years ago

For an object moving with constant negative acceleration, draw the following:

Physics

1 answer:

Tcecarenko [31]2 years ago

3 0

Answer:

Kindly find the graphs attached

Explanation:

For figure 1: There is a steady increase in the position of the object as time increases. This is because despite the negative acceleration (deceleration), the object continues to move and cover more ground as time goes by.

The straight line graph is observed because the acceleration is constant and not varying.

For Figure 2: The graph of velocity vs time will have an inverted nature. This is because since the object is decelerating, it is reducing in its velocity as time goes by (increases). This is also in a straight line since the deceleration is constant.

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2 years ago

A ball is dropped from a building of height h. Assume the ball starts from rest and that air friction can be ignored. Derive an

agasfer [191]

Answer:

$t=\sqrt{h/g}$

Explanation:

We use the kinematics equation to solve this question:

$y(t)=y_{o}+v_{o}t+1/2*a*t^{2}$

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$a=-g$ the acceleration is the gravity, negative because it points downwards

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$y(t)=h/2$ final height

So:

$h/2=h-1/2*g*t^{2}$

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2 years ago

A real spring does not oscillate forever. Instead, it eventually comes to a stop. Does this violate the law of conservation of e

ss7ja [257]

It does not violate the law of conservation of energy. The oscillation stops when the energy is lost and the energy is lost because it becomes heat that is created by the air resistance and many other forces found in the surrounding of the oscillating spring.

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2 years ago

What is the length of a spring that has 450J of potential energy and a spring constant of 650N/m?

11111nata11111 [884]

Answer:

Δx = 1.2 m

Explanation:

The CHANGE of spring length) (Δx) can be found using PS = ½kΔx²

Δx = √(2PS/k) = √(2(450)/650) = 1.17669... ≈ 1.2 m

The actual length of the spring is unknown as it varies with material type, construction method, extension or compression, and other variables we have no clue about.

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2 years ago