7
The diagram shows a wooden beam PQ, of negligible weight, which is attached to a wall by a
hinge at P and kept in a horizontal position by a vertical rope attached at Q.
The beam is 3.0m in length.
A man of weight 800 N walks along the beam from P to Q.
wall
man
-rope
beam
Р
Q
hinge
1200
What is the distance of the man from P when the tension in the rope at Q becomes equal to
500N?
Gadifada

Answer:

M1u1+ m2u2= (m1+m2) V by uisng this equation we can find out the velocity. The answer would be 42 ms-1. IS IT CORRECT?

Answer:

N = 1471.5[N]

Explanation:

We must remember that anybody lying on a horizontal surface, the normal force is defined as the vector corresponding to the force of equal magnitude to the product of mass by gravity, but in the opposite direction to the vector of weight.

To calculate the magnitude of the normal force (equal to weight), we can perform the product of mass by gravity.

[tex]w =m*g\\[/tex]

where:

w = weight [N] (units of Newtons)

m = mass = 150 [kg]

g = gravity acceleration = 9.81 [m/s²}

[tex]N=w[/tex]

[tex]N=150*9.81\\N = 1471.5[N][/tex]

Answer:

Metaphase

Explanation:

During metaphase,chromosome line up in the middle of the cell.

Answer:

For every action, there is an opposite and equal re-action.

Explanation:

Newton's Third Law of Motion states "To every action, there is an equal and opposite reaction; action and reaction forces act on different bodies".

Answer:

The average acceleration of the cyclist is 5 m/s²

Explanation:

Given;

initial velocity of the cyclist, u = 10 m/s

final velocity of the cyclist, v = 20 m/s

initial time of the cyclist, t₁ = 4 seconds

final time of the cyclist, t₂ = 6 seconds

The average acceleration is given by;

[tex]a = \frac{dv}{dt}\\\\a = \frac{v-u}{t_2-t_1}\\\\a = \frac{20-10}{6-4}\\\\a = 5 \ m/s^2[/tex]

Therefore, the average acceleration of the cyclist is 5 m/s²

Answer:2.5 meters per second

Explanation:

10/4=2.5

Answer:

the molecules form new chemical bonds

Explanation:

The circumstance which will not occur when water undergoes a physical change is that the molecules form new chemical bonds. Thus, the correct option for this question is B.

Physical change may be defined as a type of change within the compound or things that significantly do not change the chemical properties of the matter. It usually involves the process of transition from one state to another.

When water undergoes a physical change means liquid to solid, solid to liquid, or gas, the motion of the molecules, kinetic energy, and density alter with respect to the state of matter. So, all these attributes are classified into the category of physical change.

Therefore, the molecules forming new chemical bonds is the option that will not occur at any point in time when water undergoes a physical change. Thus, the correct option for this question is B.

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#SPJ2

Answer:

i vigilate

Explanation:

Answer:

(0.5, 2)

(-2, 4)

Explanation:

Answer:

Explanation:

Given the magnitude of the forces, 7N and 2N, the minimum combining force acting on the forces are when the force's is acting in opposite direction.

Magnitude of the force in opposite direction is 7N - 5N = 2N

The maximum combining force occurs when they act in the same direction. Magnitude of the force in the same direction is 5N+7N = 12N

Hence the range of magnitude requires is 2N≤F≤12N

Answer:

organic material

Explanation:

Answer:

A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled. The independent variable is the one that is changed by the scientist.

Explanation:

Answer:

Kinetic energy=1/2mvsquare

1/2 x 1400 x 25 x25

Therefore kinetic energy= 437500Joules

Explanation:

Answer:

437,500 Joules

Explanation:

KE= 1/2 × M

x V^2, where

M = Mass,

V = Velocity

KE = 1/2 × 1400 × 25^ 2

KE= 1/2 × 1400 × 625

KE = 437,500 Joules.

Answer:

3552.6N

Explanation:

F=mg

=3.72*955

=3552.6N

Answer:

3552.6N

Explanation:

Answer:

answer below

Explanation:

2: net force

3: balanced force

4: unbalnced force

i hope this is right

Answer:

Clouds are made up of tiny water droplets. ... As more and more droplets join together they become too heavy and fall from the cloud as rain. Warm air can hold more moisture than cool air. When the warmer air is cooled and the moisture condenses, it often rains more heavily.

Explanation:

hope it helps

Answer:

Haha

Explanation:

Answer:

An image can be seen in the mirror because the light reflected from an object falls on the mirror and it is reflected.

Answer:

GAIA is composed of three main parts; the astrometry instrument, the photometric instrument, and the radial-velocity spectrometer. The astrometry instrument is used to determine the angular positions of stars to better measure their distances and motions. The photometric instrument measures the luminosity of stars to help determine stellar properties such as temperature, mass, age, and what elements the stars are made up of. The radial-velocity spectrometer will determine the speed of galactic objects along the line of sight.

Explanation:

The three main parts that make up GAIA are :

The functions of the main parts of GAIA are as follows

Hence we can conclude that the three main parts that make up GAIA are astrometry , photometric instrument and radial-velocity spectrometer

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Answer:

C) 350 m/s N

Explanation:

Velocity is measured in miles per hour or metres per second.

Answer:

what are the options?

Explanation:

Explanation:

The force would be net positive.

sorry Idk the answer ..???

Răspuns:

1,054 × 10 ^ -6Combombs

Explicaţie:

Conform legii coloumbs, forța de atracție sau repulsie între sarcină este exprimată ca;

F = kq1q1 / r²

F este forța atracției

q1 și q2 sunt taxele

r este distanța dintre sarcini

Deoarece taxele sunt egale, q1 = q2 = q

Ecuația devine

F = kq² / r²

Dat

F = 0,1N

r = 10cm = 0,1m

Necesar

q

Înlocuiți parametrii dați în formulă;

0,1 = 9 × 10 ^ 9q² / 0,1

0,1 × 0,1 = 9 × 10 ^ 9q²

0,01 = 9 × 10 ^ 9q²

q² = 0,01 / 9 × 10 ^ 9

q² = 0,01 / 9.000.000.000

q² = 1,11 × 10 ^ -12

q = √1.11 × 10 ^ -12

q = 1,054 × 10 ^ -6Combombs

Prin urmare, sarcina electrică pe una dintre sfere este de 1,054 × 10 ^ -6Combombs

Answer:

:) luv. u good tho

Explanation:

ty u to

Answer:

(a) s(t) = 4.9t²

(b) s(1) = 4.9 m

(c) s(2) = 19.6 m

Explanation:

(a)

the position time equation can be formed by using 2nd equation of motion:

s = Vi t + (1/2)gt²

where,

s = position

Vi = Initial velocity = 0 m/s

t = time

g = 9.8 m/s²

Therefore,

s = (0 m/s)t + (1/2)(9.8)t²

s(t) = 4.9t²

(b)

s(1) = 4.9(1)²

s(1) = 4.9 m

(c)

s(2) = 4.9(2)²

s(2) = 19.6 m

We want to get the motion equations of a ball, and we want to use them to find the position of the ball at different times.

The solutions are:

We know that the ball starts from rest (so the initial velocity is zero) from the position x = 0.

The ball has a constant acceleration of 2.4 m/s^2

Then the acceleration equation is:

A(t) = 2.4 m/s^2

To get the velocity equation we integrate, remember, the initial velocity is zero, so we don't have a constant of integration:

V(t) = (2.4 m/s^2)*t

To get the position equation we integrate again, and because the initial position is x = 0, we don't have a constant of integration:

P(t) = 0.5*(2.4 m/s^2)*t^2

a) The position equation is:

P(t) = (1.2 m/s^2)*t^2

b) The position of the ball at t = 1s is given by:

P(1s) =  (1.2 m/s^2)*(1s)^2 = 1.2m

The ball position at t = 1s is x = 1.2m

c) Similar to the above case:

P(2s) = (1.2 m/s^2)*(2s)^2 = 4.8 m

x = 4.8m

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