Why would it be important to know Newton’s second law in the real world?

1 answer:

3 0

of motion f=ma is very important because it shows the relationship between force and motion. it allow you to calculate the acceleration and velocity and position. and object with know force is incredibly valuable for scientist,engineer, inventor etc.

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5. A student travels 11 m north and then turns around to travel 25 m south. If the total time of travel is 12 sec., find a) The

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Explanation:

Given that,

A student travels 11 m north and then turns around to travel 25 m south.

Total time, t = 12 s

The total distance or the total path covered by the student is equal to 11 m + 25 m = 36 m

Displacement of the student or the shortest path covered is d = 25-11 = 14 m

(a) The student's average speed = total distance/total time

$s=\dfrac{36\ m}{12\ s}\\\\s=3\ m/s$

(b) The student's average velocity = total displacement/total time

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In our lab experiment on Ohm's law, the power supply is connected to a circuit containing one resistor, and a direct current of

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Answer: (A) 3.0=A

Explanation: In order to explain this problem we have to use the OHM law, given by: V=R*I

Besides, we have to consider the resitance equivalent for a parallel connection. This is given by:

1/Re=1/R1+1/R2

If we connect the same resistance, the equivalent resistance is R/2.

Initlally the current is 1.5 A when one resistance is connected to the batttery. When a second resistance with the same value is connected in parallel to the battery, we have V=Re*Ifinal= (R/2)*Ifinal

also we know that V=R*Iinitial so Iinitial=V/R

then Ifinal= 2*V/R=2*Iinitial

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