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2 years ago

How will you show the distance time graph of

Physics

1 answer:

Elina [12.6K]2 years ago

5 0

Answer:

Explanation:

Here we have to consider the gradient of the graph.

Gradient = ( Distance / Time ) = Speed

For

(a) Gradient is zero there fore straight line

(b) For uniform speed ( Constant speed ) gradient is constant .

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What is the displacement of the particle in the time interval 7 seconds to 8 seconds? A. 0 meters B. 1.5 meters C. 3 meters D. 7

Dmitrij [34]

Answer: B. 1.5 meters

Explanation:

4 0

1 year ago

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el extremo de un brazo robotico se mueve hacia la derecha a 8m/s . cuatro segundos despues. se mueve hacia la izquierda a 2m/s.¿

rewona [7]

Answer: Change in velocity: -10 m/s, acceleration=-2.5m/s

Explanation:

The question in english is written below:

The end of a robotic arm moves to the right at 8m s. Four seconds later it moves to the left at 2m/s. What is its change in velocity and what is its change in acceleration?

We have the following data:

Initial Velocity of the robotic arm: $V_{o}=8 m/s$ (to the right)

Final Velocity of the robotic arm: $V_{f}=-2 m/s$ (to the left)

Variation in time: $\Delta t=4 s$

Firstly we have to calculate the change in velocity $\Delta V$ , which is given by the following equation:

$\Delta V=V_{f}-V_{o}=-2 m/s-8 m/s$

$\Delta V=-10 m/s$ This means the resultant velocity is to the left

Now, we can find the acceleration $a$ , given by:

$a=\frac{\Delta V}{\Delta t}$

$a=\frac{-10 m/s}{4 s}$

$a=-2.5 m/s^{2}$ This means the acceleration is also to the left, however its magnitude is always positive: $2.5 m/s^{2}$

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2 years ago

Another word for state of matter is _________.

Firdavs [7]

I would think phase... none of the others make sense

8 0

2 years ago

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How did dalton improve the atomic theory more than 2000 years after democritus's hypothesis about atoms?

suter [353]

Dalton improved the atomic theory by establishing that elements are made of atoms & that all atoms of an element are identical.

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2 years ago

A worker is thinking about two ways to get a box up 1.2 m onto a loading dock. He can use a force of 250 N to lift it straight u

harina [27]

Answer:

The second option has a lower power output. P=30 W

Explanation:

Mechanical Power

It is a physical magnitude that measures the rate a work W is done over time t.

$\displaystyle P=\frac{W}{t}$

Since W=F.d

$\displaystyle P=\frac{F.d}{t}$

The first option means the worker will lift the box by a distance of 1.2 meters in 3 seconds by applying 250 N of force. That produces a power of

$\displaystyle P=\frac{(250). (1.2)}{3}=100\ Watt$

The second option requires the worker applies 75 N of force and travel a distance of 4 meters for 10 seconds, thus the power is

$\displaystyle P=\frac{(75). (4)}{10}=30\ Watt$

The second option has a lower power output

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2 years ago