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3 years ago

Walking at a slower pace after realizing you will be early to school.

Physics

1 answer:

Illusion [34]3 years ago

3 0

Answer:

A.speed

Explanation:

I didn't quite get the question but hope this helps

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As you run , your feet push on the ground with a force 500N . The ground pushes back on your feet with a force of 500N . (Please

Mademuasel [1]

Answer:

true

Explanation:

newtons third law says to every action there is always an equal and opposite reaction. so the answer is true

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3 years ago

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An object is dropped from a 145 m ledge. How fast it is moving just before it hits the ground

LuckyWell [14K]

D = 1/2 x g × t²
145 = 1/2 × 9.8 × t²
t = 5.4 s

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3 years ago

What is the average acceleration of the object represented in the graph above over the 10 seconds? I know the answer isn’t C

polet [3.4K]

It's always a good idea to start with the definition of the thing you're trying to find.

This problem is just trying to find out whether you KNOW the definition of acceleration. You may know it, but you haven't used it yet.

Average acceleration = (change in velocity) divided by (total time).

Change in velocity = (end value) minus (start value)

Change in velocity = (20m/s) - 0

Change in velocity = 20 m/s

Time = 10 s

Average acceleration = (20m/s)/(10s)

Average acceleration = 2 m/s^2

3 0

3 years ago

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Does resistance in a circuit remain constant if the temperature changes?

Mazyrski [523]

Answer:

No the resistance of a given circuit does not remain constant if the temperature of the circuit changes.

Explanation:

The resistance of any resistor used in a circuit depends upon the temperature of that resistor. This can be mathematically represented as follows

$R(t)=R_{0}(1+\alpha \Delta t)$

Where,

R(t) is resistance of any resistor at temperature t

$R_{o}$ is the resistance of the resistor at time of fabrication

α is temperature coefficient of resistivity it's value is different for different materials

This change in the resistance is the cumulative effect of:

1) Variation of resistivity with temperature

2) Change in dimensions of the resistor with change in temperature

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4 years ago

A railroad car of mass 2,000 kg traveling at a velocity v = 10 m/s is stopped at the end of the tracks by a spring-damper system

Murrr4er [49]

Stopped at the end of the tracks by a spg-damper system, as shown in fig. 1

6 0

3 years ago