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3 years ago

7

Newton's three laws of motion

2 answers:

AfilCa [17]3 years ago

4 0

Answer:

The third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal force on object A. Notice that the forces are exerted on different objects.

Explanation:

katovenus [111]3 years ago

4 0

Answer:

number 1. States that an object at rest will remain at rest, and an object moving at a constant velocity will continue moving at a constant velocity, unless it is acted upon by an unbalanced force.

"Also called- the law of inertia"

number 2.acceleration depends on the object's mass and on the net force acting on the object.

number 3.States that if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.

"for every action there is an equal but opposite reaction"

Explanation:

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15. What is the impedance of a series combination of a resistance of 1KM and a capacitance of a capacitor 2 µF at a frequency of

GrogVix [38]

Answer:

Z = 1879.64 Ω = 1.879 KΩ

Explanation:

First, we will find the capacitive reactance of the capacitor:

$X_{c} = \frac{1}{2\pi fc}\\$

where,

Xc = Capacitive Reactance = ?

f = frequency = 50 Hz

C = Capacitance = 2 μF = 2 x 10⁻⁶ F

Therefore,

$X_{c} = \frac{1}{2\pi(50\ Hz)(2\ x\ 10^{-6} F)}\\X_{c} = 1591.55\ \Omega$

This is an RC series circuit. In the RC circuit the value of impedance is given by the following formula:

$Z = \sqrt{R^2 + X_{c}^2}\\Z = \sqrt{(1000\ \Omega)^2 + (1591.55\ \Omega)^2}\\$

<u>Z = 1879.64 Ω = 1.879 KΩ</u>

5 0

3 years ago

Striking a fixed object at 60 MPH is the same as falling from a _____ story building:

yulyashka [42]

speed of the striking object is given as

$v = 60 mph$

now this speed in SI units given as

$v = 60 \times \frac{1609 m}{3600 s}$

$v = 26.82 m/s$

So here we can use kinematic now to find the height from where it is dropped

so here we will have

$v_f^2 - v_i^2 = 2 a d$

now we have

$v_f = 26.82 m/s$

$v_i = 0$

$a = 9.81 m/s^2$

now from above equation

$26.82^2 - 0 = 2(9.81)d$

$d = 36.67 m$

now we know that average height of 1 story building is 3 meter

so approx total number of stories in the building will be

$N = \frac{36.67}{3} = 12 story$

6 0

3 years ago

Read 2 more answers

I need help, thanks! :^)

NNADVOKAT [17]

Answer:

B. Air

Explanation:

I'm taking the exam rn ^^

3 0

3 years ago

What is the equation for frequency?

timofeeve [1]

Answer:

f=1/t is the equation of frqency

8 0

3 years ago

From Doppler shifts of the spectral lines in the light coming from the east and west edges of the Sun, astronomers find that the

Gala2k [10]

Answer:

T= 37 day

Explanation:

To solve this exercise we will use the definition of angular velocity as the angular distance, which for a full period is 2pi between time.

w = T / t

The relationship between angular and linear velocity is

v = w r

w = v / r

We substitute everything in the first equation

v / r = 2π / t

t = 2π r / v

Let's reduce to the SI system

V = 2 km / s (1000m / 1km) = 2 10³ m / s

r= R = 6.96 10⁸ m

Let's calculate

t = 2π 6.96 10⁸/2 10³

t = 3.2 10⁶ s

T = t = 3.2 10⁶ s ( 1h/3600s) (1 day/24 h)

T= 37 day

3 0

3 years ago