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3 years ago

What is Newton's third law?

Physics

2 answers:

Phantasy [73]3 years ago

8 0

Answer:

Newton's third law of motion is that "Every action has an equal and opposite reaction."

Explanation:

For example, when a rocket is launched, the boosters apply force on the ground and the ground pushes back, which makes the rocket take off.

harina [27]3 years ago

3 0

For every actions there is an equal and opposite reaction.

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The boy moving down the hill posses what energy?

elena-s [515]

Answer: Kinetic energy

Explanation:

Kinetic energy and potential energy can change forms. For example, the car moving up the hill is kinetic energy

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2 years ago

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Two charges, q1 and q2, are separated by a certain distance r. if the magnitudes of the charges are halved and their separation

vazorg [7]

The electrical force between these two charges remains the same. In coulomb’s law, it states that the magnitude of two charges (product of two charges) is inversely proportional to the square of the distance. Since both the magnitude and the distance are halved, therefore, the change in both quantities will have no effect in the value of electrical force.

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3 years ago

A certain freely falling object, released from rest, requires 1.95 s to travel the last 23.5 m before it hits the ground. (a) Fi

Ratling [72]

Answer:

(a). The velocity of the object is -2.496 m/s.

(b). The total distance of the object travels during the fall is 23.80 m.

Explanation:

Given that,

Time = 1.95 s

Distance = 23.5 m

(a). We need to calculate the velocity

Using equation of motion

$s = ut+\dfrac{1}{2}gt^2$

Put the value into the formula

$-23.5=u\times1.95+\dfrac{1}{2}\times(-9.8)\times(1.95)^2$

$u=\dfrac{-23.5+4.9\times(1.95)^2}{1.95}$

$u=-2.496\ m/s$

(b). We need to calculate the total distance the object travels during the fall

Using equation of motion

$v = u+gt$

Put the value in the equation

$-2.496=0-9.8\times t$

$t =\dfrac{2.496}{9.8}$

$t=0.254\ sec$

The total time is

$t'=t+1.95$

$t'=0.254+1.95$

$t'=2.204\ sec$

We need to calculate the distance

Using equation of motion

$s = ut+\dfrac{1}{2}gt^2$

Put the value into the formula

$s=0+\dfrac{1}{2}\times9.8\times(2.204)^2$

$s=23.80\ m$

Hence, (a). The velocity of the object is -2.496 m/s.

(b). The total distance of the object travels during the fall is 23.80 m.

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3 years ago

Which statement best explains why an object weight less on mercury than it does on earth

larisa [96]

This is because planet weigh different amount and force of gravity is different from planet to planet for example if your weigh on earth is 100 pound than on mercury is only 78 pounds

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3 years ago

Two cranes each lift containers with the same mass to the same height. The first crane takes 47 seconds, while the second crane

Mazyrski [523]

Answer: The first crane has greater power

Explanation:

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3 years ago