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Nezavi [6.7K]
3 years ago
13

Please help fast!

Physics
1 answer:
REY [17]3 years ago
7 0

Answer:

In physics, resistive force is a force whose direction is opposite to the velocity of the body, or of the sum of the other forces, and may refer to friction and drag. The average resistance force is the change in momentum divided by the time required to stop the bullet. The distance covered under constant acceleration is 1/2 a* t^2.

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is weigh-in time for the local under-85-kg rugby team. The bathroom scale used to assess eligibility can be described by Hooke’s
yulyashka [42]

Answer:

a) 156960 N/m

b) Yes the player can play on the team.

Explanation:

F = Force

a = Acceleration due to gravity = 9.81 m/s²

m = Mass

k = Spring constant

x = Deformation length of spring

F = ma

From Hooke's law

F=kx\\\Rightarrow ma=kx\\\Rightarrow k=\frac{ma}{x}\\\Rightarrow k=\frac{120\times 9.81}{0.0075}\\\Rightarrow k=156960\ N/m

The effective spring constant is 156960 N/m

When x = 0.48 cm = 0.0048 m

m=\frac{kx}{a}\\\Rightarrow m=\frac{156960\times 0.0048}{9.81}\\\Rightarrow m=76.8\ kg

The mass of the player is 76.8 kg which is less than the required mass limit of the players' which is 85 kg. So, the player is eligible to play.

5 0
3 years ago
a 2kg ball moving at speed 5m/s hits a wall .the force exerted by the wall on the ball is 100n .if the collision is perfectly el
levacccp [35]

Answer:

0.2s

force = change in momentum/ time

time = change in momentum/time

Explanation:

first, let's find the change in momentum

pf-pi

5×(-2) - 5× 2

-20kgm/s = 20kgm/s(by changing the direction of whole system)

time = change in momentum/time

               20/100

                 <u> 0.2s</u>

4 0
3 years ago
what happens to the current across a circuit when the voltage is doubled while the resistance is held back ​
Lynna [10]

Since the current is inversely propotional to its resistance, when the voltage is doubled the current will be one-half

7 0
3 years ago
Read 2 more answers
What did Greek philosophers, Isaac Newton, and others commonly use to explain
Temka [501]

Answer:

Hey there!

They used math to explain their observations, for example, Newton is famous for his three laws, and universal laws of gravitation.

Let me know if this helps :)

3 0
3 years ago
Can anyone help me please it due at 11:59
Colt1911 [192]

Explanation:

there is mathematics or anything here

6 0
3 years ago
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