Directions: Name 2 kitchen tools, equipment or materials you are going to

A bicycle wheel has an initial angular velocity of 1.10 rad/s . Part A If its angular acceleration is constant and equal to 0.20

MA_775_DIABLO [31]

Let $\theta$ , $\omega$ , and $\alpha$ denote the angular displacement, velocity, and acceleration of the wheel, respectively.

(A) The wheel has angular velocity at time $t$ according to

$\omega=\omega_0+\alpha t$

so that after 2.50 s, the wheel will have attained an angular velocity of

$\omega=1.10\dfrac{\rm rad}{\rm s}+\left(0.200\dfrac{\rm rad}{\mathrm s^2}\right)(2.50\,\mathrm s)=\boxed{1.60\dfrac{\rm rad}{\rm s}}$

(B) The angular displacement of the wheel is given by

$\theta=\theta_0+\omega_0t+\dfrac\alpha2t^2\implies\Delta\theta=\omega_0t+\dfrac\alpha2t^2$

After 2.50 s, the wheel will have turned an angle $\Delta\theta$ equal to

$\Delta\theta=\left(1.10\dfrac{\rm rad}{\rm s}\right)(2.50\,\mathrm s)+\dfrac12\left(0.200\dfrac{\rm ram}{\mathrm s^2}\right)(2.50\,\mathrm s)^2=\boxed{3.38\,\mathrm{rad}}$

4 0

4 years ago

Closer lines of__ indicate a stronger__ field. What are the missing words??

Alexxx [7]

magnets indicate a stronger magntic field

5 0

3 years ago

A 55.0 kg bungee jumper steps off a bridge with a light bungee cord tied to her and to the bridge. The unstretched length of the

lianna [129]

Answer:

$69.06\ \text{N/m}$

Explanation:

m = Mass of bungee jumper = 55 kg

g = Acceleration due to gravity = $9.81\ \text{m/s}^2$

h = Height at the bottom = 40 m

k = Spring constant

x = Displacement of bungee cord = 25 m

Applying the principle of conservation of energy to the system we have

$mgh=\dfrac{1}{2}kx^2\\\Rightarrow k=\dfrac{2mgh}{x^2}\\\Rightarrow k=\dfrac{2\times 55\times 9.81\times 40}{25^2}\\\Rightarrow k=69.06\ \text{N/m}$

The spring constant of the bungee cord is $69.06\ \text{N/m}$ .

5 0

3 years ago

A cook preparing a meal for a group of people is an example of ______

Sati [7]

Answer:

Option B is correct.

Explanation:

Potential energy or chemical potential energy is used to Cook food which is then converted into thermal energy. The type of energy used also depends upon the type of cooking appliances used.

For e.g. stove convert potential energy to thermal energy.

7 0

4 years ago

(a) two protons in a molecule are 4.50 10-10m apart. find the magnitude of the electric force exerted by one proton on the other

Anuta_ua [19.1K]

Answer:

a) 1. 1365 × 10⁻⁹N

b) 9.1862 × 10⁻⁴⁶N

c) 8.61 × 10⁻¹¹C/Kg

Explanation:

Ke = 8.99× 109 N.m2 / C2 , G = 6.67 × 10-11 N. m2 / kg2

a) F = Ke . q₁.q₂/r²

= (8.99× 109 N.m2 / C2 ) ×(1.60×10⁻¹⁹C)²/(4.50×10⁻¹⁰C)²

= 1. 1365 × 10⁻⁹N

b)

F = Gm₁m₂/r²

= (6.67× 10⁻¹¹)×(1.67×10⁻²⁷)²/(4.50×10⁻¹⁰)²

= 9.1862 × 10⁻⁴⁶N

The electric force is larger by 8.0497 ×10³⁷ times

c)

if Keq₁q₂/r² Gm₁m₂/r²,

with q₁=q₂ = q, and m₁ =m₂ = m

Then q/m = $\sqrt{G/M}$ = $\sqrt{(6.67 X 10^{-11} } /8.89 X 10^{9}$

= 8.61 × 10⁻¹¹C/Kg

8 0

3 years ago