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3 years ago

15

Letters A, B, C, and D represent locations on a bar magnet. Which location has the greatest magnetic force?

2 answers:

WITCHER [35]3 years ago

8 0

I have to go with letter B

denis-greek [22]3 years ago

6 0

I'd say D. Here is why.

The magnetic field of a bar magnet is strongest at either pole of the magnet. It is equally strong at the north pole<span> compared with the </span>south pole<span>. The force is weaker in the middle of the magnet and halfway between the pole and the center. So that means that the south and/or north poles have the strongest magnetic field.</span>

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An amusement park ride consists of a car moving in a vertical circle on the end of a rigid boom of negligible mass. The combined

MrRa [10]

Incomplete question as the car's speed is missing.I have assumed car's speed as 6.0m/s.The complete question is here

An amusement park ride consists of a car moving in a vertical circle on the end of a rigid boom of negligible mass. The combined weight of the car and riders is 6.00 kN, and the radius of the circle is 15.0 m. At the top of the circle, (a) what is the force FB on the car from the boom (using the minus sign for downward direction) if the car's speed is v 6.0m/s

Answer:

$F_{B}=-5755N$

Explanation:

Set up force equation

∑F=ma

∑F=W+FB

$\frac{mv^{2} }{R}=W+F_{B}\\ F_{B}=\frac{mv^{2} }{R}-W\\F_{B}=\frac{(W/g)v^{2} }{R}-W\\F_{B}=\frac{(6000N/9.8m/s^{2} )(6m/s)^{2} }{(15m)}-6000N\\F_{B}=-5755N$

The minus sign for downward direction

6 0

3 years ago

What type of change occurs when water changes from a solid to a liquid

Jobisdone [24]

What type of change occurs when water changes from solid to a liquid a phase change a physical change and irreversible change both A and the

8 0

4 years ago

A force of 50 N was necessary to lift a rock. A total of 150 J of work was done. How far was the rock lifted?

Kitty [74]

Answer:

$\boxed {\boxed {\sf 3 \ meters}}$

Explanation:

Work is the product of force and distance.

$W=F*d$

We know the force to lift the rock was 50 Newtons. The work was 150 Joules.

1 Joule is equal to 1 Newton meters.
We can convert the units to make the problem simpler later. The work is also 150 Newton meters.

$W= 150 \ N*m \\F= 50 \ N$

Substitute the values into the formula.

$150 \ N*m= 50 \ N * d$

We want to solve for distance, so we must isolate the variable. Divide both sides of the equation by 50 Newtons.

$\frac{150 \ N*m}{50 \ N }=\frac{50 \ N * d}{50 \ N }$

The Newtons will cancel out.

$\frac{150 \ m }{50} =d \\3 \ m =d$

The rock was lifted <u>3 meters.</u>

7 0

3 years ago

The acceleration of gravity on earth is approximately 10 m/s2 (more precisely, 9.8 m/s2. if you drop a rock from a tall building

VLD [36.1K]

From the equation;
a= -1÷2gT2
a= -5×3(3)
a= -45m/s
it will drop about -45m/s2.

8 0

3 years ago

A segment is divided into two parts having lengths in the ratio of 5:3. If the difference between the length of the parts is 6",

Triss [41]

Answer:

15"

Explanation:

Let x be the length of the longer part, then the length of the shorter part is 3x/5, or also x - 6

therefore we have the following equation:

3x/5 = x - 6

We can multiply both sides by 5

3x = 5x - 6*5

2x = 30

x = 30/2 = 15"

So the length of the longer part is 15"

5 0

3 years ago