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Anna71 [15]
3 years ago
6

Question 3 (5 points)

Physics
1 answer:
Elan Coil [88]3 years ago
7 0

True: when there is an angle between force and displacement, W=Fd cos \theta

Explanation:

The work done by a force when pushing/pulling an object is given by the equation

W=Fd cos \theta

where

F is the magnitude of the force

d is the displacement of the object

\theta is the angle between the direction of the force and of the displacement

We have two extreme cases:

- When the force is parallel to the displacement, then \theta=0^{\circ} and cos \theta = 1, so the work done is maximum and simply becomes

W=Fd

- When the force is perpendicular to the displacement, then \theta=90^{\circ} and cos \theta =0, so the work done is zero.

Learn more about work:

brainly.com/question/6763771

brainly.com/question/6443626

#LearnwithBrainly

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What is consistency paradox​
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Answer:

Consistency paradox is the observation that a human being’s personality tends to remain the same over time, while their behavior can change in different situations.

Many personality characteristics are relatively constant throughout a person's life, but people can act in all sorts of ways (even ones that seem to be opposite of their personality) in different situations. For instance, even the most even-tempered and easy-going person can be driven to violence when put under enough stress or pressure.

8 0
4 years ago
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 kg/m3 , length 81.7 cm and diameter 2.70 cm fr
Genrish500 [490]

Answer:

35.792 N

Explanation:

d = Diameter of rod = 2.7 cm

h = Length of rod = 81.7 cm

\rho = Density of rod = 7800 kg/m³

g = Acceleration due to gravity = 9.81 m/s²

Volume of rod

V=\dfrac{1}{4}\pi d^2h\\\Rightarrow V=\dfrac{1}{4}\times \pi\times (2.7\times 10^{-2})^2\times 81.7\times 10^{-2}

Mass is given by

m=\rho V\\\Rightarrow m=7800\times \dfrac{1}{4}\times \pi\times (2.7\times 10^{-2})^2\times 81.7\times 10^{-2}\\\Rightarrow m=3.6486\ kg

Weight is given by

W=mg\\\Rightarrow W=3.6486\times 9.81\\\Rightarrow W=35.792\ N

The weight of the rod is 35.792 N

7 0
3 years ago
Devni and James are discussing water pressure. Devni thinks that the pressure exerted by a liquid depends on the density of the
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Answer:

Devni is correct

Explanation:

The relationship between pressure and density of a liquid is directly proportional i.e. the amount of pressure exerted on a liquid is directly proportional to its density and this is because when pressure is exerted the volume is compressed hence there will be a proportional increase in density as well.

hence pressure is as important as density in liquids

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Based on the data in the table, what will happen when a sound wave travels from copper into lead?​
Lynna [10]

Answer:

A i believe

Explanation:

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3 years ago
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Marianna [84]

Answer:

A

Explanation:

A. The pencil is on the table in broad daylight

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