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3 years ago

Write a paragraph describing Newton's 2nd Law in YOUR OWN WORDS.

Physics

1 answer:

julia-pushkina [17]3 years ago

7 0

Explanation:

if u apply more force to an object, it accelerates at a higher rate

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If I wanted to generate a maximum emf of 20 V, what angular velocity (radians/sec, aka Hz) would be required given a circular co

MissTica

Answer:

35.36776 Hz

Explanation:

B = Magnetic field = $9\times 10^{-3}}\ T$

$E_m$ = Maximum voltage = 20 V

d = Diameter of coil = 40 cm = 0.4 m

A = Area = $\pi \frac{d}{2}^2=\pi 0.2^2$

N = Number of turns = 500

$\omega$ = Angular velocity

Maximum emf is given by

$E_m=NAB\omega\\\Rightarrow \omega=\frac{E_m}{NAB}\\\Rightarrow \omega=\frac{20}{500\times \pi\times 0.2^2\times 9\times 10^{-3}}\\\Rightarrow \omega=35.36776\ Hz$

The angular velocity would be 35.36776 Hz

8 0

4 years ago

A bus travels 300 km south along a straight path with an average velocity of 85 km/h to the south. The bus stops for 22 minutes.

Kruka [31]

a) Answer;

= 6.72 hours

Explanation and solution;

velocity = distance over time

Since we know the velocity and the distance, we can simply calculate time

For the first part

85 km/h = 300km / time

time = 3.53 hours

Then there is a 22 min stop, which is the same as 0.37 hours

so far the trip is:

3.53 + 0.37 = 3.9 hours

then for the last stretch:

78 km/h = 220 km / time

time = 2.82 hours

So the total trip is:

3.9 + 2.82 = 6.72 hours

b) Answer;

= 77.38 km/hr

Explanation and solution;

we take the total distance divided by the total time to get the average.

total distance = 300 km + 220 km = 520 km

total time = 6.72 hours

Average velocity = 520 km / 6.72 hours = 77.38 km/hr

5 0

3 years ago

The Force Of Gravity Acting On A Childs Mass On Earth Is 490 newtons whats the childs mass

Flauer [41]

Force of gravity on an object is the weight of the object and is given by mass times accerelation due to gravity. The accerelation due to gravity is the accerelation of an object in free fall and is given by 9.8m/s^2. Given that the force of gravity acting on a child's mass on earth is 490 newtns, i.e. F = mg which means that 490 newtons = 9.8 times mass. Therefore, mass of the child is 490 / 9.8 = 50 kg.

3 0

4 years ago

Two acrobats flying through the air grab and hold onto each other in midair as part of a circus act.One acrobat has a mass of 60

earnstyle [38]

Answer:

1.36m/s

Explanation:

We are given that

Mass of one acrobat, $m_1=60 kg$