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3 years ago

Acceleration with motion graphs please help

Physics

1 answer:

sattari [20]3 years ago

8 0

The acceleration of the car in section C is -3 m/s/s

Explanation:

The acceleration of a body is defined as:

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

where

$\Delta v$ is the change in velocity of the body

$\Delta t$ is the time it takes for the body to change its velocity by $\Delta v$

We notice that in a graph of velocity vs time, the slope of the graph is

$m=\frac{\Delta v}{\Delta t}$

So we see that the slope of the graph corresponds to the acceleration of the object.

In section C of this graph, we have:

$\Delta v = v-u=6 m/s - 12 m/s = -6 m/s$ is the change in velocity of the object

$\Delta t = 11 s - 9 s = 2 s$ is the time interval

Therefore, the slope of the graph (and so, the acceleration of the car) in section C is:

$a=\frac{-6}{2}=-3 m/s^2$

Learn more about acceleration here:

brainly.com/question/9527152

brainly.com/question/11181826

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brainly.com/question/2562700

#LearnwithBrainly

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Hope this helps!!

3 0

3 years ago

Which of the diagrams below illustrates sound waves generated by a siren

stepladder [879]

Diagram D. shows the sound waves generated by a siren

that is moving with constant speed to the left.

A sound wave is the sample of disturbance caused by the movement of strength journeying thru a medium because it propagates far away from the supply of the sound. Sound waves are created by using object vibrations and bring strain waves, for example, a ringing cellular phone.

Sound waves fall into three classes: longitudinal waves, mechanical waves, and strain waves. keep studying to find out what qualifies them as such. Longitudinal Sound Waves A longitudinal wave is a wave wherein the movement of the medium's debris is parallel to the course of the energy transport. Sound propagates via air or different mediums as a longitudinal wave, in which the mechanical vibration constituting the wave occurs along the direction of propagation of the wave.

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3 0

1 year ago

Describe two experiments to determine the speed of propagation of a transverse wave on a rope. You have the following tools to u

AnnZ [28]

Answer:

#See solution for details.

Explanation:

Tools: $stopwatch, \ meter \ stick, \ mass \ measuring \ scale , \ force \ measuring \ device$ .

$Experiment \ 1$ :Calculate the speed of the wave using the time, $t$ it takes to travel along the rope. Rope's length, $L$ is measured using the meter stick.

-Attach one end of rope to a wall or post, shake from the unfixed end to generate a pulse. Measure the the time it takes for the pulse to reach the wall once it starts traveling using the stopwatch.

-Speed of the pulse can then be obtained as:

$v=\frac{L}{t}$

$Experiment \ 2$ : Apply force of known value to the rope then use the following relation equation to find the speed of a pulse that travels on the rope.