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3 years ago

9

A round or canon uses _______ imitation.

1 answer:

bazaltina [42]3 years ago

5 0

The answer is C. strict

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The combination of an applied force and a friction force produces a constant total torque of 35.5 N · m on a wheel rotating abou

Cerrena [4.2K]

Answer:

a) $I = 19.799\,kg\cdot m^{2}$ , b) $T = -3.405\,N\cdot m$ , c) $n_{T} \approx 54.842\,rev$

Explanation:

a) The net torque is:

$T = I\cdot \alpha$

Let assume a constant angular acceleration, which is:

$\alpha = \frac{\omega-\omega_{o}}{t}$

$\alpha = \frac{10.4\,\frac{rad}{s} - 0\,\frac{rad}{s} }{5.80\,s}$

$\alpha = 1.793\,\frac{rad}{s^{2}}$

The moment of inertia of the wheel is:

$I = \frac{T}{\alpha}$

$I = \frac{35.5\,N\cdot m}{1.793\,\frac{rad}{s^{2}} }$

$I = 19.799\,kg\cdot m^{2}$

b) The deceleration of the wheel is due to the friction force. The deceleration is:

$\alpha = \frac{\omega-\omega_{o}}{t}$

$\alpha = \frac{0\,\frac{rad}{s} - 10.4\,\frac{rad}{s}}{60.4\,s}$

$\alpha = - 0.172\,\frac{rad}{s^{2}}$

The magnitude of the torque due to friction:

$T = (19.799\,kg\cdot m^{2})\cdot (-0.172\,\frac{rad}{s^{2}} )$

$T = -3.405\,N\cdot m$

c) The total angular displacement is:

$\theta_{T} = \theta_{1} + \theta_{2}$

$\theta_{T} = \frac{(10.4\,\frac{rad}{s} )^{2}-(0\,\frac{rad}{s} )^{2}}{2\cdot (1.793\,\frac{rad}{s^{2}} )} + \frac{(0\,\frac{rad}{s} )^{2}-(10.4\,\frac{rad}{s} )^{2}}{2\cdot (-0.172\,\frac{rad}{s^{2}} )}$

$\theta_{T} = 344.580\,rad$

The total number of revolutions of the wheel is:

$n_{T} = \frac{\theta_{T}}{2\pi}$

$n_{T} = \frac{344.580\,rad}{2\pi}$

$n_{T} \approx 54.842\,rev$

5 0

3 years ago

Fter carrying out some tests at a local stream, you discover that the pH in the stream is extremely low. Based on this, you shou

n200080 [17]

Answer:

D) not swim in or drink the water from the stream

Explanation:

Low pH means the water is acidic which is harmful to your skin as it can cause burns and irritations. So any means of contacting with water is not healthy. The damage to the skin happens as in acidic water it has more H+ than in the neutral water and the extra H+ ions can ionize the atoms which are combined to form different compounds in the skin when in contact.

5 0

3 years ago

Read 2 more answers

What is the capital of Alaska?

rjkz [21]

Answer:

Juneau

Explanation:

6 0

3 years ago

Read 2 more answers

Which one of Newton’s Laws fits this statement: More mass means more force need to accelerate?

Artemon [7]

The answer would be Newton’s Second Law

6 0

3 years ago

A spring (70 N/m ) has an equilibrium length of 1.00 m. The spring is compressed to a length of 0.50 m and a mass of 2.0 kg is p

madreJ [45]

Answer:

Part a)

$L = 0.68 m$

Part b)

$L = 0.63 m$

Explanation:

Part a)

As we know that there is no friction in the path

So here we can use energy conservation to find the distance moved by the mass

Initial spring energy = final gravitational potential energy

so we will have

$\frac{1}{2}kx^2 = mgL sin\theta$

$\frac{1}{2}70(0.5)^2 = 2(9.81)(L) sin41$

$8.75 = 12.87 L$

$L = 0.68 m$

Part b)

Now if spring is connected to the block then again we can use energy conservation

so we will have

$\frac{1}{2}kx^2 = mg(x + x')sin\theta + \frac{1}{2}kx'^2$

so we will have

$\frac{1}{2}(70)(0.5^2) = 2(9.81) (0.50 + x') sin41 + \frac{1}{2}(70)x'^2$

$8.75 = 6.43 + 12.87 x' + 35 x'^2$

$x' = 0.13 m$

so total distance moved upwards is

$L = 0.5 + 0.13 = 0.63 m$

8 0

3 years ago