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Liono4ka [1.6K]
3 years ago
10

1. A goal is scored in soccer when_____. (1 point)

Physics
2 answers:
MAXImum [283]3 years ago
7 0
1. none of the above, because the ball must go inside the net 
5. shooting
6. none of the above. the only skill that the goalie has that the rest dont have is using his hands to stop the ball from getting into the net
7. heading. if done incorrectly can seriously be dangerous
8. dribbling

VikaD [51]3 years ago
6 0

Answer:

1. The ball crosses the goal line 2 Instep 3. Trapping 4. Trapping 5. Shooting 6. Punting 7. Heading 8. Dribbling 9. Throw-in 10. Thigh Trap.

Hope this helps!

You might be interested in
Can someone answer these?
scoray [572]

Nine

<em><u>Remark</u></em>

Nine is just a super problem. You understand 9 thoroughly and I guarantee a good mark. It goes to the very heart of physics and the processes it uses.

I don't know if you know about free body diagrams. If you don't, you should. Start with the up and down forces working on the chain pulling upward. Use a circle to represent the center of the action.

Draw an arrow pointing to the top of the page. Label it T for Tension. Now go to the bottom of the circle. Draw two arrows going down. One of them is the boulder. Let the mass of the boulder = M

Let the Mass of the chain = m. Don't worry about the numbers. We'll get around to them later.

So far what you have is T - Mg - mg

Tension is a force.

Mg is a weight which is also a Force.

mg is a weight which is also a Force. So far you have 3 forces. What is the net result? The two weights are accelerated upwards (otherwise the boulder would never be hauled upward. Now we have

<em><u>T - Mg - mg = (m + M)a.</u></em> This is the key equation in the entire problem. We need to use the fact about T not being more that 2.5 times it's own weight.

T ≤ 2.5 * m*g Now we put that into the main equation. We'll use the upper limit. =

2.5mg - (m+M)g = (m + M)a   Now to do just a little math. (No physics). Add (m + M)g to both sides

2.5mg = (m + M)g + (m+M)a  Use the distributive property to factor this

2.5mg = (m + M)(a + g)   Divide by m + M

2.5mg/(m + M) = a + g    We need to isolate a. Subtract g

2.5mg/(m + M) - g = a     We know the entire left side. We can put numbers in at this point. It's not very elegant, but it will work.

m = mass the chain = 575 kg

M = mass of the boulder = 750 kg

g = 9.81 m/s^2

2.5*575*9.81/(575 + 750) - g = a

10.64 - 9.81 = a

a = 0.8329 m/s^2.

Note: The units are correct and the sign on a is correct. The up forces are plus and the down accelerations are minus. Everything is looking good.

The rest of the problem just uses

d = 125 meters

a = 0.8329 m/s^2

vi = 0

t = ???

<em><u>Formula</u></em>

d = vi*t + 1/2 a t^2

125 = 1/2 * 0.8329 t^2  Multiply through by 2 and divide by 0.8329

125 *2 / 0.8329 = t^2

t^2 = 300.1

t = sqrt(300.1)

t = 17.32

Answer: C

Eight

You got this one correct, or we agree that B is the answer. I'll just so a quick solution to this question

This problem is not very well worded. The only way you can get an answer is if you know something about tennis. You have to understand that when you serve, the ball goes straight up. All the forces and velocities are vertical.

Nothing is horizontal until the racket hits the ball. The 73.14 is a horizontal velocity. The question doesn't tell you that and it should

So vi = 0

vf = 73.14

ΔV = 73.14 - 0 = 73.14 m/s

contact time = 30 milliseconds = 30/1000 seconds = 0.03 seconds

mass = W/9.81

<em><u>Formula</u></em>

F = m * ΔV / time

F = (w/9.81) * 73.14  / 0.03

F = w * 248

Answer B

Ten

Ten looks easy, because the math is grade 8 or 9 math. The physics certainly is not. Einstein based some of relativity on a thought problem like this one so the problem is not trivial.

Here's the question. What does the 60N weight represent and which way is it going? Is it going up or down? and if you can decide that, which way is the acceleration (2.45 m/s^2 going, up or down)? Finally who is feeling the 60 N and what does it represent? Now the problem (the physics problem) has presented you with trouble. It is not the math.

The weight of the fish is down.

The 2.45 m/s^2 is up

9.81 of course is down (it always is)

So in order for the elevator to accelerate upward it must be going upward with a net acceleration of 9.81 + 2.45. That's because the elevator must overcome the gravitational acceleration

m*(9.81 + 2.45)  = 60N

m*12.26 = 60N

m = 60/12.26

m = 4.894 kg

Now if the fish were on the ground being held up in the air by a proud fisherman, the fish would actually weigh

F = m*g

m = 4.894

g = 9.81

F = 4.894 * 9.81 = 48 kg

Answer C


5 0
3 years ago
3.
Alborosie

Answer:

C

Explanation:

Acceleration is defined as a change in velocity over time. This means that as long as the forces are not zero, the velocity should be changing. The can be negative (as this is negative acceleration also known as deceleration) or positive (known as acceleration). It doesn't matter if they are decimals or fractions.

4 0
3 years ago
Read 2 more answers
A monument has a height of 348 ft, 8 in. Express this height in meters. Answer in units of m.
tensa zangetsu [6.8K]

Answer:

The height of mountain in meter will be 106.2732 m

Explanation:

We have given height of mountain = 348 ft,8 in

We know that 1 feet = 0.3048 meter

So 348 feet =348\times 0.3048=106.07meter

And we know that 1 inch = 0.0254 meter

So 8 inch 8\times 0.0254=0.2032m

So the total height of mountain in meter = 106.07+0.2032 = 106.2732 m

The height of mountain in meter will be 106.2732 m

4 0
3 years ago
1. A 46000N helicopter feels a net force of 9200N. What litt force is exerted by the air on the propellers?
Lina20 [59]

Answer:

Force exerted by the air on the propellers = 46000 - 9200

= 36800 N

Hope this helps!

4 0
3 years ago
Determine the magnitude of the component of F directed along the axis of AB. Set F = 520 N .
Soloha48 [4]

Answer:

The component of F along AB is equal to Fcos45

F = 520N

Component along AB = 520cos45

= 367.7N

This is done by rotating the diamonds such that AB is now taken as the x-axis. Then the force F is resolved along AB.

Explanation:

7 0
3 years ago
Read 2 more answers
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