2 years ago

2. How much do you think the force of friction must be? Why?

Physics

1 answer:

Tamiku [17]2 years ago

4 0

Answer:

It must be high do to the gravity

Explanation:

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kramer

Answer:

60.2 J

Explanation:

Efficiency is the ratio of work out to work in.

e = Wout / Win

0.86 = Wout / 70 J

Wout = 60.2 J

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3 years ago

Read 2 more answers

1) Momenum is

adelina 88 [10]

Answer:

momentum formula = Mass × Velocity

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3 years ago

A horizontal uniform bar of mass 2.7 kg and length 3.0 m is hung horizontally on two vertical strings. String 1 is attached to t

Jlenok [28]

Answer:

14.36 N

Explanation:

$T_{1}$ = Tension in string 1

$T_{2}$ = Tension in string 2

$m_b$ = mass of the bar = 2.7 kg

$W_b$ = weight of the bar

weight of the bar is given as

$W_b = m_{b} g = (2.7) (9.8) = 26.46$ N

$m_m$ = mass of the bar = 1.35 kg

$W_m$ = weight of the monkey

weight of the monkey is given as

$W_m = m_{m} g = (1.35) (9.8) = 13.23$ N

Using equilibrium of torque about left end

$W_{m} (AB) + W_{b} (AB) = T_{2} (AC)\\W_{m} (AB) + W_{b} (AB) = T_{2} (AD - CD)\\(13.23) (1.5) + (26.46)(1.5) = T_{2} (3 - 0.65)\\\\T_{2} = 25.33$ N

Using equilibrium of force in vertical direction

$T_{1} + T_{2} = W_{b} + W_{m}\\T_{1} + 25.33 = 26.46 + 13.23\\T_{1} = 14.36$ N

7 0

3 years ago

Consider the following situations: i. A ball moving at speed v is brought to rest ii. The same ball starts at rest and is projec

tatyana61 [14]

Answer:

c. Case iii

Explanation:

the ball will experience the largest change in case iii

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2 years ago

Describe the motion of a person who is standing on the earths surface

oee [108]

They are rotating because the earth never stops rotating.

8 0

2 years ago