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andrew11 [14]
2 years ago
11

Brainlist nd 20 points

Physics
2 answers:
nadezda [96]2 years ago
4 0

Answer:

I'm not sure but I think it's 35-39

zubka84 [21]2 years ago
3 0
I think it’s 35-39 in my opinion
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Two boxers are fighting. Boxer 1 throws his 5 kg fist at boxer 2 with a speed of 9 m/s.
Sladkaya [172]

Answer:

0.001 s

Explanation:

The force applied on an object is equal to the rate of change of momentum of the object:

F=\frac{\Delta p}{\Delta t}

where

F is the force applied

\Delta p is the change in momentum

\Delta t is the time interval

The change in momentum can be written as

\Delta p=m(v-u)

where

m is the mass

v is the final velocity

u is the initial velocity

So the original equation can be written as

F=\frac{m(v-u)}{\Delta t}

In this problem:

m = 5 kg is the mass of the fist

u = 9 m/s is the initial velocity

v = 0 is the final velocity

F = -45,000 N is the force applied (negative because its direction is opposite to the motion)

Therefore, we can re-arrange the equation to solve for the time:

\Delta t=\frac{m(v-u)}{F}=\frac{(5)(0-9)}{-45,000}=0.001 s

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3 years ago
A force of 99 N causes a box to accelerate at a rate of 12 m/s2. What is the mass of the box?
ira [324]


m = F/a

m = 99/11 = 9

The answer is 9 Kg

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