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rjkz [21]
3 years ago
14

What are the laws of motion

Physics
2 answers:
Salsk061 [2.6K]3 years ago
8 0
The laws describe the relationship of an object and the forces acting on it
Vladimir [108]3 years ago
4 0

Explanation:

Their are 3 laws of motion, specifically known as Newton's law of motion.

In the first law, an object will not change its motion unless a force acts on it.

In the second law, the force on an object is equal to its mass times its acceleration.

In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

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A track star in the broad jump goes into the jump at 12 m/s and launches himself at 20° above the horizontal. How long is he in
emmainna [20.7K]

Explanation:

It is given that,

Initial speed of the broad jump, u = 12 m/s

It is launched at an angle of 20 degrees above the horizontal. Let t is the time for which the track star i in the air before returning to Earth. The motion of the track star in the broad jump can be treat as the projectile motion. The time of flight of the projectile is given by :

t=\dfrac{2u\ sin\theta}{g}

Putting all the values in above equation as :

t=\dfrac{2\times 12\times \ sin(20)}{9.8}

t = 0.837 seconds

So, the time for which the track star is in air is 0.837 seconds. Hence, this is the required solution.

3 0
3 years ago
How do high-energy electrons from glycolysis and the krebs cycle contribute to the formation of atp from adp in the electron tra
ivanzaharov [21]

Answer

Together with glycolysis, The Krebs cycle, and the electron transport chain release about 36 molecules of ATP per molecule of glucose.The Krebs cycle uses the two molecules of pyruvic acid formed in glycolysis and yields high-energy molecules of NADH and flavin adenine dinucleotide (FADH2), as well as some ATP. The electron transport chain forms a proton gradient across the inner mitochondrial membrane, which drives the synthesis of ATP

5 0
4 years ago
Threshold potential refers to the membrane potential required to:
ivanzaharov [21]

B. initiate an action potential.

Action potentials are initiated when a depolarization reaches a threshold potential. This threshold potential varies, but is normally around 55 or 50 millivolts above the resting potential of the cell, which implies that the input current of sodium ions exceeds the output current of potassium ions.

4 0
3 years ago
Read 2 more answers
A 1.4kg block and a 2.7kg block are attached to opposite ends of a light rope. The rope hangs over a solid, frictionless pulley
leonid [27]

Answer:

32.67 m/s^2

Explanation:

27 cm = 0.27 m

As the blocks are hanging on 2 sides of the pulley, their difference in mass would generate a net force toward the heavier side:

Let g = 9.81 m/s2

F = g(2.7 - 1.4) = 9.81*1.3 = 12.753 N

This force would generate a torque at 0.27 m moment arm

T = F*r = 12.753*0.27 = 3.44 Nm

The moment of inertia of the solid disk:

I = mR^2/2

Where m = 0.78 kg is the disk mass and R = 0.27 m is the radius of the disk.

I = 0.780*27^2/2 = 0.028431 kgm^2

So the angular acceleration of the torque is

\alpha = T/I = 3.44 / 0.028431 = 121 rad/s^2

So the linear acceleration is its angular component times radius

a = \alpha r = 121 * 0.27 = 32.67 m/s^2

3 0
3 years ago
……………………………………………………………..?
TEA [102]

Answer:

last is the answer.

increase the voltage in order to send energy faster.

4 0
2 years ago
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