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mash [69]
4 years ago
5

O Which is true? (Check all that apply)

Physics
1 answer:
Kipish [7]4 years ago
6 0
Let's see:

<span> Objects with more mass require more force to move them. --> true, in fact Newtons's second law states:
F=ma
so, the larger the mass m, the larger the force F needed to move the object with same acceleration a

 Objects that experience balanced forces CANNOT be moving.--> false, in fact, when the resultant of the forces acting on the object is zero (so, all the forces are balanced), it means the object has no acceleration. However, this doesn't imply that the velocity of the object is zero, so it is possible that the object is moving even if all the forces are are balanced

 Objects that are in motion require an unbalanced force to stop them. --> true: in fact, if the forces acting on the object are balanced, then for Newton's second law
F=ma
the acceleration of the object would be zero, so the object would still move by uniform motion. So, in order to stop the object, we need unbalanced forces acting on it.

 The acceleration of an object would increase if there is an increase in the force on the object. --> true: in fact, Newton's second law states
F=ma
so, if the force F on the object increases, then the acceleration a of the object increases as well.</span>
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The aeroplane lands at a speed of 80 m/s
strojnjashka [21]

The mass of the aeroplane is 300,000 kg.

<h3>What is Newton's second law of motion?</h3>

It states that the force F is directly proportional to the acceleration a of the body and its mass.

The law is represented as

F =ma

where acceleration a = velocity change v / time interval t

Given is the aeroplane lands at a speed of 80 m/s. After landing, the aeroplane takes 28 s to decelerate to a speed of 10 m/s. The mean resultant force on the aeroplane as it decelerates is 750 000 N.

The force expression will be

F = mv/t

Substitute the values and we have

750000 = m x  (80 -10)/ 28

750,000 = m x 2.5

m = 300,000 kg

Thus, the mass of the aeroplane is 300,000 kg.

Learn more about Newton's second law of motion.

brainly.com/question/13447525

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8 0
2 years ago
I need help with this someone help me?
Brilliant_brown [7]
Graph A so answer B also why isn’t answer a with graph A and B with graph B etc like that’s just confusing lol
3 0
3 years ago
Wavelength of 125 meters is moving at a speed of 10 m/s.<br> What is it's frequency?
Alexandra [31]

Answer:

Frequency= 12.5

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5 0
3 years ago
A small metal bar whose initial temperature was 20 degrees Celsius is dropped into a large container of boiling water. How long
Vesnalui [34]
Below is the answer. I hope it help.
T ( t ) = C e k t + T m where Tm is the temperature of the surroundings 
T ( t ) = C e k t + T m
T ( 0 ) = 20
T ( 1 ) = T ( 0 ) + 2 = 22
C + T m = 20 C+Tm=20 
C e k + T m = 22

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3 years ago
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Rom4ik [11]
Do you mean mitosis? If so metaphase. 
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