All categories

2 years ago

A 20 kg truck drives in a circle of radius 4 m at 10m/s. What causes

Physics

1 answer:

jek_recluse [69]2 years ago

6 0

Answer:

Normal force

Explanation:

The force is centipetral force

Calculating :-

Mass=m=20kg
Radius=r=4m
Velocity=10m/s=v

We know

$\boxed{\sf F_c=\dfrac{mv^2}{r}}$

$\\ \sf\longmapsto F_c=\dfrac{20(10)^2}{4}$

$\\ \sf\longmapsto F_c=\dfrac{20(100)}{4}$

$\\ \sf\longmapsto F_c=\dfrac{2000}{4}$

$\\ \sf\longmapsto F_c=500N$

You might be interested in

How many atoms are in a sample of 2.39 moles of neon (Ne) atoms?

Reil [10]

<span>Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles.

</span>2.39 moles Ne ( 6.022 x 10^23 atoms / mole ) = 1.44 × 10^24 atoms Ne

4 0

2 years ago

Chicago Bears rookie running back Tarik Cohen stands 5 feet and 6 inches tall, which is 66 total inches. How many meters tall is

Sholpan [36]

1.6764 meters. You can also google inches to meters for your answer.

5 0

2 years ago

Amy has a mass of 30 kg, and she is riding a skateboard traveling 5 m/s. What is her momentum?

Flauer [41]

Hey there!

So we know that m*v=P.
And in this question m=30
v=5 m/s
P = 30*5 Kgm/s
P = 150 Kgm/s

So, your final answer is 150 Kg.m/s

Hope this helps! :)

5 0

2 years ago

Read 2 more answers

Air resistance _______ as you move faster.

Brums [2.3K]

Answer:

Air resistance <u>increases</u> as you move faster.

Hope this helps!

8 0

2 years ago

Read 2 more answers

It takes 3.0 eV of energy to excite an electron in a 1-dimensional infinite well from the ground state to the first excited stat

valentina_108 [34]

Answer:

0.614 nm

Explanation:

Energy of the nth state of one dimensional infinite wall is,

$E=\frac{n^{2} h^{2} }{8mL^{2} }$

Given the energy to excite an electron from ground state to first excited state is,

$\Delta E=3eV\\\Delta E=3(1.6\times10^{-19})J$

And the Plank's constant is, $h=6.626\times10^{-34}Js$

Mass of electron, $m=9.1\times10^{-31}kg$

Now the energy will of a 1 dimensional infinite wall which excite an electron from ground state to first excited state will be,

$\Delta E=\frac{2^{2} h^{2} }{8mL^{2} } -\frac{1^{2} h^{2} }{8mL^{2} }$

Put all the variables in above equation and rearrange it for L.

$L^{2} =\frac{3((6.626\times10^{-34}Js)^{2} )}{8\times9.1\times10^{-31}kg\times3(1.6\times10^{-19})J} \\L^{2} =0.376922012\times10^{-18} m^{2}\\ L=0.6139\times10^{-9}m\\ L=0.614nm$

Therefore the width of the box is 0.614 nm.

6 0

2 years ago