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2 years ago

I can't seem to get the right angular acceleration and also not sure how to do part b. Help will be much appreciated.

Physics

1 answer:

Tcecarenko [31]2 years ago

8 0

Answer:It’s 5 I believe

Explanation: it says to round to the nearest thousandths, so it’ll be 5.

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The pulley system has a mechanical advantage of 5. Determine how much input force is required to achieve 1000 N of lifting force

olga55 [171]

Answer:

Input force of pulley system = 200 N

Explanation:

Given:

Mechanical advantage of pulley system = 5

Output force from pulley system = 1,000 N

Find;

Input force of pulley system

Computation:

Mechanical advantage = Output force / Input force

Mechanical advantage of pulley system = Output force from pulley system / Input force of pulley system

5 = 1,000 / Input force of pulley system

Input force of pulley system = 1,000 / 5

Input force of pulley system = 200 N

3 0

3 years ago

A man pulls on his dog's leash to keep him from running after a bicycle. Which term best describes this example? Select one: A.

madreJ [45]

C. Negative force. The dog isn't going to learn that way.

6 0

3 years ago

What is the mass of a child in a wagon that has a velocity of 10 m/s and a Momentum of 30 KG* M/S

LenKa [72]

Explanation:

sinces : Momentum = velocity × mass

then : 30 = 10 × m and m = 30 ÷ 10 = 3 kg

3 0

2 years ago

A small lead ball, attached to a 1.70-m rope, is being whirled in a circle that lies in the vertical plane. The ball is whirled

Otrada [13]

Answer:

H = 54.37

Explanation:

given,

lead ball attached at = 1.70 m

rate of revolution = 3 revolution/sec

height above the ground = 2 m

$velocity = \dfrac{distance}{time}$

circumference of the circle = 2 π r

= 2 x π x 1.7

= 10.68 m

$velocity = \dfrac{3 \times 10.68}{1}$

v = 32.04 m/s

using conservation of energy

$\dfrac{1}{2}mv^2 + mgh = mgH$

$\dfrac{1}{2}v^2 + gh = gH$

$\dfrac{1}{2}32.04^2 + 9.8\times 2 = 9.8\times H$

$532.88 = 9.8\times H$

H = 54.37

the maximum height reached by the ball is equal to H = 54.37

4 0

3 years ago

An electric pump rated at 1000W, takes 16 seconds to pump 100 kg of water out to a tank at a height of 10 m. what is the efficie

TEA [102]

Answer:

$\boxed{\sf Efficiency \ of \ the \ motor = 62.5 \ \%}$

Given:

Input Power ( $\sf P_i$ )= 1000 W

Mass (m) = 100 kg

Height (h) = 10 m

Time (t) = 16 s

To Find:

Efficiency of the motor

Explanation:

$\boxed{ \bold{Output \: power \: (P_o)= \frac{mgh}{t}}}$

$\sf \implies P_o = \frac{100 \times 10 \times 10}{16}$

$\sf \implies P_o = \frac{10000}{16}$

$\sf \implies P_o = \frac{ \cancel{16} \times 625}{ \cancel{16}}$

$\sf \implies P_o = 625 \: W$

$\boxed{ \bold{Efficiency = \frac{Output \ Power \ (P_o)}{Input \ Power \ (P_i) } \times 100}}$

$\sf \implies Efficiency = \frac{625}{10 \cancel{00}} \times \cancel{100}$

$\sf \implies Efficiency = \frac{625}{10}$

$\sf \implies Efficiency = 62.5 \: \%$

$\therefore$

Efficiency of the motor = 62.5 %

5 0

3 years ago