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tensa zangetsu [6.8K]
3 years ago
11

A high school physics teacher also happens to be the junior hockey team coach. During a break at practice, the coach asks two pl

ayers to go to the center of the ice with a 10.0-m pole. A 40-kg player is at one end of the pole and a 60-kg player is at the other end. The players then start pulling themselves together by pulling the rod and sliding on the ice as they move along the rod. When the two players meet, what distance will the 60-kg player have moved
Physics
1 answer:
yawa3891 [41]3 years ago
4 0

Answer:

Explanation:

Since no external force acts on the system , centre of mass of two players will remain the same throughout the movement .

Distance of centre of mass is inversely proportional to mass . So centre of mass of the system will be nearer to 60 kg player

Distance of cetre of mass from 60 kg player

= 10 x 40 / (60+40 )

= 4 m

They will meet at centre of mass .

So, 60 kg player will be moving by a distance of 4 m , 40 kg player will be moving by 6 m before they meet .

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An assault rifle fires an eight-shot burst in 0.40 s. Each bullet has a mass of 7.5 g and a speed of 300 m/s as it leaves the gu
myrzilka [38]

Answer:

The average recoil force on the gun during that 0.40 s burst is 45 N.

Explanation:

Mass of each bullet, m = 7.5 g = 0.0075 kg

Speed of the bullet, v = 300 m/s

Time, t = 0.4 s

The change in momentum of an object is equal to impulse delivered. So,

F\times t=mv\\\\F=\dfrac{mv}{t}

For 8 shot burst, average recoil force on the gun is :

F=\dfrac{8mv}{t}\\\\F=\dfrac{7.5}{1000}\cdot\dfrac{300}{0.4}\cdot8\\\\F=45\ N

So, the average recoil force on the gun during that 0.40 s burst is 45 N.

5 0
2 years ago
Which of these will be the correct relationship between work input and work output?
dsp73

<u>Answer:</u>

Work input = Work output * Work against friction is your answer so C

<u>Explanation:</u>

I hope this helps you :)

8 0
2 years ago
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worty [1.4K]

Answer:

a. True

Explanation:

Distance is described with only magnitude. It is defined as the total path covered by an object, in other words it  is the length of a path followed by a particle.

Displacement is described with both magnitude and direction. It is distance traveled in a specified direction or  change in position in some time interval.

Therefore, the correct option is " a. True"

7 0
3 years ago
What symbol is used to represent being dissolved in water?
miss Akunina [59]
(aq)
This means it’s aqueous (dissolved in water)
8 0
3 years ago
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A negatively charged particle is attracted to
Tatiana [17]

Answer: I think the answer is D.

Positively charged particles.

8 0
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