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Margaret [11]
3 years ago
14

Prove that Force is equal to mass and acceleration​

Physics
1 answer:
lyudmila [28]3 years ago
5 0
I mean F=ma states that mass and acceleration has an equal effect on force. So the forces you applied on 2 balls having different masses gave the same acceleration and the one with the greater mass had the greater force applied on it. Hence F is directly proportional to mass.
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An ice skater has a moment of inertia of 2.5 kg.m2 when her arms are extended and a moment of inertia of 1.2 kg.m2 when her arms
Damm [24]

Answer:

\omega=4.7916\ rad.s^{-1}

Explanation:

Given:

  • moment of inertia of the skater with extended arms, I'=2.5\ kg.m^2
  • moment of inertia of the the skater with pulled-in arms, I=1.2\ kg.m^2
  • angular velocity of the skater with extended arms, \omega'=2.3\ rad.s^{-1}

<u>Using the law of conservation of angular momentum:</u>

I'.\omega'=I.\omega

2.5\times 2.3=1.2\times \omega

\omega=4.7916\ rad.s^{-1}

6 0
3 years ago
The magnetic field is strong near the ____ of a magnet.
shtirl [24]

The magnetic fields of magnets are most powerful at the <u>poles of a magnet</u>. Without any difference in the magnitude, both the poles have equal amount of Magnetic field intensity at their poles.

If you see the field lines we can see the field lines start from the North Pole run parallel and end at the South Pole.  The field lines are concentrated more at the poles hence the magnetic field intensity or the magnetic field itself is more at the poles than any other part.

3 0
3 years ago
Could tests be performed to support the clamim?
valentina_108 [34]
Yes it will thats the same question I got
3 0
3 years ago
During each cycle of operation a refrigerator absorbs 56 cal from the freezer compartment and expels 81 cal tothe room. If one c
Alexandra [31]

Answer:

138.18 minutes

Explanation:

L_v = Latent heat of water at 0°C = 80 cal/g

m = Mass of water = 570 g

Heat removed for freezing

Q=mL_v\\\Rightarrow Q=570\times 80\\\Rightarrow Q=45600\ cal

Let N be the number of cycles and each cycle removes 56 cal from the freezer.

So,

55\times N=45600\\\Rightarrow N=\frac{45600}{55}

Each cycle takes 10 seconds so the total time would be

\frac{45600}{55}\times \frac{10}{60}=138.18\ minutes

The total time taken to freeze 138.18 minutes

6 0
3 years ago
Name two ways the eye adapts to dim light
Anarel [89]
There are many ways that eye adapts to dim light but i will name only 2

1) Efficiency 
2) Ambient light response 



hope thHIs helPs

5 0
4 years ago
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