PHYSICS HIGH SCHOOL

What is the weight, on Earth, of a book with a mass of 1.5 kg

Answers

Answer 1
Answer:

Answer: 14.7 N

Explanation:

The weight of an object on Earth is given by

W=mg

where

m is the mass of the object

g=9.81 m/s^2 is the acceleration due to gravity on Earth's surface

In this problem, we have a book of mass m=1.5 kg, so its weight is given by

W=mg=(1.5 kg)(9.81 m/s^2)=14.7 N
Answer 2
Answer: The answer is
D) 14.7 N

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Explain why a clothes iron with a metal base must be connected to the mains by a three-core cable.

Answers

The earth connection is because the earth connection(third cable) helps to prevent the casing from turning into a live wire.

What are the three cables?

It is normal to find that the cable that is used in the pressing iron has three wires that connect to live, neutral and earth. The earth connection is very important in the pressing iron.

The reason why we ought to have the earth connection is because the earth connection helps to prevent the casing from turning into a live wire.

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The charge going to the clothes iron needs to be grounded so the iron does not make any shock

A 12.0 kg bucket is lowered vertically by a rope in which there is 163 N tension at any given instant. What is the acceleration of the bucket? Is it accelerating up or down? Denote the acceleration in m/s2 where up is positive and down is negative.

Answers

Answer:

The acceleration of the bucket is 3.77m / S ^ 2 up

Explanation:

Hello,

To solve this exercise we must initially draw the free-body diagram (see attached image) of the bucket, and identify the forces present in this case would be the tension force of the rope and the weight of the bucket.

Then use Newton's law that states that the sum of the forces in a body is equal to mass per accession. We will assume that up is positive and down is negative

T=tension=163N

m=mass of bucket =12kg

g=gravity=9.81m/S^2

T-mg=m(a)

(T-mg)/(m) =a\n(163N-(12kg)(9.81m/S^2)/(12)=3.77m/s^2

The acceleration of the bucket is 3.77m / S ^ 2 up

Final answer:

The weight of the bucket is 117.6 N. As the tension in the rope is 163 N, which is greater than the weight of the bucket, this means the bucket is accelerating upwards. The acceleration of the bucket, calculated using Newton's Second Law, is 3.78 m/s².

Explanation:

To answer this question, we need to understand the concept of tension and how it relates to the weight of an object and its acceleration according to Newton's Second Law. The tension in the rope (T) equals 163 N, and the weight of the bucket (W) equals its mass (12.0 kg) times acceleration due to gravity (9.8 m/s²), so W = (12.0 kg) (9.8 m/s²) = 117.6 N.

Since the tension is greater than the weight, it means the bucket is accelerating upwards. To calculate the acceleration, we subtract the weight from the tension and divide by the mass. This leaves us with a = (T - W) / m = (163 N - 117.6 N) / 12.0 kg = 3.78 m/s² (upwards, hence positive).

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The force of gravity between two objects is directly proportional to which of the following? a. the masses of each object.
b. the velocity of each object.
c. the distance between the objects squared.
d. the mass of one object and the distance between the objects.

Answers

Force of gravity =Gxm1xm2 /r^2G= gravitational constantm1 and m2 are massesr is the distance between masses.So a is the correct option
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product of the two masses, and to the mass of each object individually.

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Answers

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Answers

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