PHYSICS MIDDLE SCHOOL

A force gives a 5.0 kg object an acceleration of 2.0 m/s 2. The same force would give a 20 kg object an acceleration of _____. 0.5 m/s 2 2.0 m/s 2 4.9 m/s 2 8.0 m/s 2

Answers

Answer 1

Answer:

Answer:

The acceleration of the object is 0.5 m/s²

a is correct.

Explanation:

Given that,

Mass of object = 5.0 kg

Acceleration $a = 2.0 m/s^2$

Using newton's second law

The force is the product of the mass of the object and acceleration.

$F = ma$

Put the value of m and a

$F = 5.0*2.0$

$F = 10\ N$

Now, The same force would give a 20 kg object

So, Using newton's second law again

$F = ma$

The acceleration is

$a =(F)/(m)$

Put the value of m and F

$a = (10)/(20)$

$a =0.5 m/s^2$

Hence, The acceleration of the object is 0.5 m/s²

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Answers

Explanation:

Newton's second law of motion states that when a certain force is acted on an object then it is equal to the mass m of that object multiplied by the acceleration a of the object.

Mathematically, the relation is as follows.

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Answers

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1)the magnetic field is strongest near_________of a bar magnet.a)the poles b)the center

2)the needle of compass line up with earth magnetic field and point to_________
a)earth poles b)earth equator

3)magnetic field lines that curve toward each other show_________
a)repulsion b)attraction

4)some animals have tiny pieces of ___________in their brains to help them find their way
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a)domains b)poles

Answers

Answer:

1 . a) the poles

2. a) earth poles.

3. b) attraction.

4. a) magnetite.

5. a) domains.

Explanation:

The magnetic field is strongest at the poles and very weak at the center of the magnet.

The magnetic compass will always align along the north - south poles of the earth. North of the compass needle is attracted towards the magnetic south pole of the earth.

Magnetic Field lines begin at the north pole of the magnet and end at the south pole. Unlike poles attract and like poles repel , so they curve for unlike poles.

Magnetite is a magnetic mineral, which is present in the animal brains , enabling them to identify correct directions.

Magnetic domains are regions where individual magnetic moments of the atoms are aligned in a definite direction.

1. Is A. at the poles because thats where the magnetic field is going out then coming back into the earth to produce the magnetic field.
2. Again its A. because the compass needle is attracted to " north " which is magnetic south. It does this because opposites attract.
3. This one would be B. Because if the magnets were being repelled the magnetic field lines would look like there was a line that the field hit and bounced off of it.
4. This answer is A. the magnetite helps them migrate so they know which way is north and which way is south.
5. This answer is A. Because without the domains there wouldn't be poles on the magnetic object.

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Answers

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Answers

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