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wariber [46]
3 years ago
7

MATCH THESE ^-^ Match Newton's law with the correct statement.

Physics
2 answers:
ikadub [295]3 years ago
4 0
1 and A
2 and B
3 and D
4 and C

Lilit [14]3 years ago
3 0

Answer:  

1. law of universal gravitation -"The box of cotton is much easier to lift than the box of books."  

2. 1st law of motion (law of inertia) - "My coffee spilled all over because you slammed on your brakes!"  

3. 2nd law of motion -  "I can't hit the ball farther than you because you're stronger than I am."  

4. 3rd law of motion - "That bat hurt my hands when I hit the ball!"  

Explanation:  

Law of gravitation states that there exists an attractive force between two objects having mass. The magnitude of the force depends upon the masses of the two objects and inversely proportional to the distance between them. Thus, greater the mass, greater would be the force. weight of an object is determines the gravitation pull of the Earth on the mass of the object. Thus, it is easier to lift a box of cotton which is lighter in weight than a box of books.  

Newton's first law states that an object remains in state of rest or motion unless exerted by an unbalanced external force. Thus, when you are sitting in the car and the driver applies break suddenly, you experience a pull force because you continue to move forward while the car suddenly decelerates and if you would be holding coffee, it can spill.  

Second law of motion states that force is rate of change of momentum. Momentum depends on the mass and velocity of the object. Greater the mass, greater would be momentum. Thus, A person who is stronger would be able to hit the ball harder and hence faster than the other.  

Third law of motion states that, for every action, there is equal and opposite reaction. Thus, when when you a ball with the bat, you are applying force with your hands. Hence, your hands would also experience an equal amount of force in the opposite direction and you would get hurt.  

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A 103 kg physics professor has fallen into the Grand Canyon. Luckily, he managed to grab a branch and is now hanging 93 m below
siniylev [52]

Answer:

125.83672 seconds

Explanation:

P = Power of the horse = 1 hp = 746 W (as it is not given we have assumed the horse has the power of 1 hp)

m = Mass of professor = 103 kg

g = Acceleration due to gravity = 9.8 m/s²

h = Height of professor = 93 m

Work done would be equal to the potential energy

W=mgh\\\Rightarrow W=103\times 9.8\times 93\\\Rightarrow W=93874.2\ J

Power is given by

P=\frac{W}{t}\\\Rightarrow t=\frac{W}{P}\\\Rightarrow t=\frac{93874.2}{746}\\\Rightarrow t=125.83672\ seconds

The time taken by the horse to pull the professor is 125.83672 seconds

6 0
3 years ago
Which statement is true regarding flexibility? A. joint's range of motion cannot be maintained with age. b.A joint's range of mo
Alex777 [14]
<span>the statement that is true regarding flexibility is : b. a joint's range of motion will be lost if the joint is not used regularly. Our body is like a machine. If we not constantly heat it up, our body will be more prone to injury. We can see that the old people who lived within the tribe in the middle of the mountain are far stronger than the one who lived in the city.</span>
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Does a mirror work because of refraction
Semenov [28]

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Using 6400 km as the radius of Earth, calculate how high above Earth’s surface you would have to be in order to weigh 1/16th of
FrozenT [24]
Gravity obeys the inverse square law.  At 6400 km above the center of the Earth (Earth's surface) you weigh x.  Twice that reduces your weight to 1/4th.  Four times that height reduces your weight to 1/16th.  4 times 6400 km is 25,600 km.  But that is above the center of the earth, and the question requests the height above the surface, so we deduct 6400 km to arrive at our final answer:  19,200 km.

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6 0
3 years ago
Can anyone help me with this question please​
JulsSmile [24]

Explanation:

V=u+at

where,

v=final speed

u=initial speed,(starting speed)

a=acceleration

t=time

  1. v=u+at = 6=2+a*2

6=2+2a

2a=6-2

2a=4

a=4/2 = 2

a =2

2. to find time taken

v=u+at

25=5*2t

2t=25-5

2t=20

t=20/2

t=10sec

3. finding final speed

v=u+at

v=4+10*2

=4+20

v=24m/sec

5.v=u+at

=5+8*10

=5+80

V=85m/sev

6. v=u+at

8=u+4*2

8=u+8

U=8/8

u=1

these are your missing values

5 0
3 years ago
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