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3 years ago

Which forces do not require contact between objects in order to exert a push or pull?

Physics

2 answers:

arsen [322]3 years ago

6 0

Answer:

Gravitational force and magnetic force. The other forces on the list require contact (tension requires contact with the rope and friction requires the object to be in contact with the surface)

Explanation:

Allisa [31]3 years ago

5 0

Answer:

gravitational force between the earth and an object and magnetic force between two magnets

Explanation:

gravitational force between the earth and an object and magnetic force between two magnets are forces that does not require contact between objects in order to exert a push or pull.

The earth and the object are never in contact with each other but there is a force of gravitation existing between them. There is force of attraction between the masses of the earth and the masses according to gravitational law are separated by a distance.

Force between two magnets may or maynot exert push or pull. They only attract when the poles of the magnets are unlike poles (different). There is force of repulsion between them if like poles of the magnet come together according to the law of magnetism. Magnets in magnetic field will always experience force even if at a distance from each other in the field hence the reason for the selected options

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Jack and Jill exercise in a 25.0 m long swimming pool. Jack swims 9 lengths of the pool in 156.9 s ( 2 min and 36.9 s ) , wherea

Leya [2.2K]

Answer:

Jill average velocity is 0

Jack average velocity is 0.159337

Jill average speed = 1.593372

Jack average speed = 1.434034

Explanation:

given data

long swimming pool = 25.0 m

9 lengths of the pool = 156.9 s ( 2 min and 36.9 s )

10 lengths = same time interval

to find out

average velocity and average speed

solution

we know that average velocity that is express as

average velocity = $\frac{displacement}{time}$ .....................1

Jill come back where she start

so here velocity will be = 0

and

Jack ends up on the other end of pool

so average velocity = $\frac{25}{156.9}$

average velocity = 0.159337

now we get here average speed that is express as

average speed = $\frac{distance}{time}$ .............2

jack speed = 9 × $\frac{25}{156.9}$

jack speed = 1.434034

and

Jill speed = 10 × $\frac{25}{156.9}$

Jill speed = 1.593372

5 0

4 years ago

Difference between good and bad conductors of heat

uranmaximum [27]

Good conductors are the materials which allow electricity to pass through them easily whereas, bad conductors are the materials which do not allow electricity to pass through them. Good conductors offer less resistance to the flow of current, whereas the bad conductors do not transmit current through them.

5 0

4 years ago

Read 2 more answers

Help me yall it due in a few minutes :((()

vaieri [72.5K]

Answer:

B. blocks 2 & 3.

Explanation:

Block 1 has equal & opposite forces acting on it.

Block 2 has 5N on one side, 3N on the other. It will move in the direction the 5N of force is pushing.

Block 3 has no opposing force.

6 0