Activity 2. The Cyclist's Speed!

Directions: Analyze the speed time graph of a cyclist on a straight track and answer the questions below.

1. What time in the graph is the
a. speed constant?________________
b. cyclist accelerating? __________
c. cyclist decelarating? __________



2. Is the motion of the cyclist uniform?
________________________________________________​

Answer:

1875 j

Explanation:

f * d = work

your AVERAGE force is (210+ 40)/2 = 125 N

125 * 15 = 1875 j

The work done during this period will be 1875 J.. if the body is displaced in the same direction of the force it will be positive.

Work done is defined as the product of applied force and the distance through which the body is displaced on which the force is applied.

Work may be zero, positive and negative.it depends on the direction of the body displaced

The given data in the problem is;

F is the average force applied by the worker

d is the displacement = 15 m

The average force is ;

[tex]\rm F_{AVG} = \frac{F_1+F_2}{2} \\\\ F_{AVG} = \frac{210+40}{2} \\\\ F_{AVG}=125 \ J[/tex]

The work done by the worker will be;

[tex]\rm W= Fd \\\\\rm W= F_{AVG}d \\\\W= 125 \times 15 \\\\ \rm W=1875 \ J[/tex]

Hence the work done during this period will be 1875 J.

To learn more about the work done refer to the link ;

https://brainly.com/question/3902440

Answer:

36 m

Explanation:

We can consider this to be an AP.

Then,

Subtract a₇ from a₉.

Finding a₁₅

Find rate of change

So

Distance travel in 6 s

Distance in 15s:-

The  direction of the motion of the reflected pulse is inverted to that of the incident pulse.

This is a physics term which refers to the single disturbance that moves through a transmission medium.

The reflected pulse is inverted so the direction is from right to left while that of the incident pulse is from left to right.

Read more about Pulse here https://brainly.com/question/14885673

Explanation:

time is nature's expression of change.

every change takes time.

it takes time to e.g. move from A to B.

at one point of time the universe is in one state, then some change happens, and the universe is in another state, and we have another point of time.

without time there is no change, without change there is no time.

Answer:

the frequency of the wave increases

Answer:

The wavelength of the wave increases

Explanation:

Just did the test

Answer:

it is magma chamber

Explanation:

Answer:

oone side at a time would be hot and the other oone

Explanation:

One side will be hot and the other cold no in-between

The height of the tower is 35.75 m.

Height is the vertical distance between two points.

To calculate the height of the tower, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitiute these values into equation 1 and solve for L

Hence, the height of the tower is 35.75 m.

Learn more about height here: https://brainly.com/question/1739912

Answer:

79 N     ( the same)

Explanation:

Iron,

I really hope this helped you

Explanation:

Answer:

Its just Cork and wax

Explanation:

I just did it on edge trust me

Answer:

A

Explanation:

Technically, your mouth is part of the digestive system though so I am not sure how accurate this question is.

Answer:

8.01 (10^-10) m

Explanation:

use the Particle in a box equation

E = (n^2) (h^2) / (8 m (L^2))

and energy of a particle as its wavelength equation

h c / lamda = E

combine the equations to get

h c / lamda =  (n^2) (h^2) / (8 m (L^2))

get L alone

L^2 = (2^2 - 1^2) h lamda / 8 m c

the longest wavelength is produced by a jump from the first excited state to the ground so

n = 2 to n = 1

so

L^2 = (n1^2 - n2^2) h lamda / (8 m c)

h = 6.6(10^-34) J*s

c = 3(10^8) m/s

m = 9(10^-31) kg

lamda = 700(10^-9) m

n1 =2

n2=1

Answer:

The top layer is the zone in which the greatest total mass of co2 is absorbed from the atmosphere.

The exosphere is the uppermost layer of Earth's atmosphere, located between 700 and 10,000 kilometers above the surface and merging with the solar wind at its summit.

The  exosphere is a narrow, ambience space that surrounds a planetary  contains particles that are gravitational forces connected to that body yet have such a low density that they are effectively collisionless.

Hence, the top layer is the zone in which the greatest total mass of co2 is absorbed from the atmosphere.

To learn more about the exosphere, refer to the link;

https://brainly.com/question/2002047

#SPJ1

The cross sectional area of the stream 0.50 m below the faucet is 2.54 x 10⁻⁵ m².

The speed of the water at the lower level is determined using Bernoulli's equation as follows;

P₀ + ρgΔh + ¹/₂ρv₁² = P₀ + 0 +  ¹/₂ρv₂²

ρgΔh + ¹/₂ρv₁²  = ¹/₂ρv₂²

gΔh + ¹/₂v₁²  = ¹/₂v₂²

9.8(0.5) + ¹/₂(5)² = ¹/₂v₂²

2(17.4) = v₂²

34.8 = v₂²

v₂ = √34.8

v₂ = 5.9 m/s

A₁v₁ = A₂v₂

A₂ = A₁v₁ /v₂

A₂ = (3.0 x 10⁻⁵ x 5) / (5.9)

A₂ = 2.54 x 10⁻⁵ m²

Learn more about speed of water here: https://brainly.com/question/19091787
#SPJ1

Explanation:

In washing machine, the electrical energy is converted in kinetic energy then the mechanical energy is converted into thermal (heat) energy.

Answer:

Different temperatures

Explanation:

C

Let's see how

We know the rule

[tex]\\ \rm\rightarrowtail V=\dfrac{Kq}{r}[/tex]

[tex]\\ \rm\rightarrowtail Kq=vr[/tex]

[tex]\\ \rm\rightarrowtail q\propto r[/tex]

As radius is same charge will be same in both

Hence they both have same charge

The pairs of triangles that can be proven congruent by the hl theorem is the right angled triangle.

The HL theorem is also known as the Hypothenus Leg theorem, it states that "the hypotenuse and leg of one right triangle are congruent to the hypotenuse and leg of another right triangle, then the two triangles are congruent."

Learn more about the postulates of the HL theorem here:

https://brainly.com/question/25922842

#SPJ4

Answer:

B

Explanation:

Answer:

D. all atoms with an atomic number over 83

Answer:

-292 degrees F

Explanation:

C = 5/9( F -32)

-180 = 5/9 (F-32)

F =  -292 degrees

(a) Average force exerted on object X by object Y and time of collision, because these measurements can be used to determine the change in momentum of object X.

(b) Average force excreted on object Y by object X and time it collision, because these measurements can be used to determine the change in momentum of object Y.

The principle of conservation of linear momentum, states that in the absence of external force, the sum of initial momentum must be equal to sum of final momentum.

P = mv

where;

F = mv/t

Ft = mv

J = Δmv

where;

mass of object X and object Y are constant, and cannot be used create graphs.

Impulse (product of force and time) received by an object is equal to change in the momentum of the object.

Thus, the pairs of data that can be used together to create two graphs, to verify the conservation of momentum are;

(a) Average force exerted on object X by object Y and time of collision, because these measurements can be used to determine the change in momentum of object X.

(b) Average force excreted on object Y by object X and time it collision, because these measurements can be used to determine the change in momentum of object Y.

Learn more about conservation of momentum here: https://brainly.com/question/7538238

#SPJ1

Answer:

Electrical energy

Explanation:

Hope It helps you

Let's see

Momentum be P

[tex]\\ \rm\Rrightarrow P=[Frequency]^a[velocity]^b[Density]^c[/tex]

[tex]\\ \rm\Rrightarrow [P]=[F]^a[v]^b[D]^c[/tex]

[tex]\\ \rm\Rrightarrow [M^1L^1T^{-1}]=[T^{-1}]^a[L^1T^{-1}]^b[M^1L^{-3}]^c[/tex]

[tex]\\ \rm\Rrightarrow MLT^{-1}=T^{-a}L^bT^{-b}M^cL^{-3c}[/tex]

[tex]\\ \rm\Rrightarrow MLT^{-1}=T^{-a-b}L^{b-3c}M^c[/tex]

On comaparing

So

and

So the unit is

Answer:

(Frequency)⁻³(velocity)⁴Density

Explanation:

See attachments.

Answer:

a)3.2m/s^2

b) -480,000N

Explanation:

mass of train= 150,000kg

velocity of train=40m/s

acceleration is negative

v^2=u^2-2as

v=0m/s

u=40m/s

s=250m

0=1600-500a

500a=1600

deceleration of 3.2m/s^2

newton's second law

F=ma

F= (150,000× -3.2)

F= -480,000N