All categories

2 years ago

12. A frain moves from rest to a speed of 25 m/s in 30.0 seconds. What is its acceleration?

Physics

1 answer:

ziro4ka [17]2 years ago

6 0

initial velocity=u=0m/s
Final velocity=v=25m/s
Time=t=30s

$\\ \tt\longmapsto Acceleration=\dfrac{v-u}{t}$

$\\ \tt\longmapsto Acceleration=\dfrac{25-0}{30}$

$\\ \tt\longmapsto Acceleration=\dfrac{25}{30}$

$\\ \tt\longmapsto Acceleration=0.8m/s^2$

You might be interested in

The phase velocity of transverse waves in a crystal of atomic separation a is given byy = csin(ka/2) pka/2 1. What is the disper

damaskus [11]

Answer:

e(k) = \frac{2a}{c} * sin (\frac{k*a}{2} )

G_{v} = \frac{d e(k ) }{dk } = \frac{a^2}{c} * cos (\frac{k* a}{2} )

Explanation:

From the question we are told that

The velocity of transverse waves in a crystal of atomic separation is

$b_y = c \frac{sin (\frac{k*a}{2} )}{\frac{k*a}{2} }$

Generally the dispersion relation is mathematically represented as

$e(k) = b_y * k$

=> $e(k) = c \frac{sin(\frac{k*a}{2} ) }{ \frac{k*a}{2} } * k$

=> $e(k) = c * \frac{sin (\frac{k_a}{2} )}{ \frac{a}{2} }$

=> $e(k) = \frac{2a}{c} * sin (\frac{k*a}{2} )$

Generally the group velocity is mathematically represented as

$G_{v} = \frac{d e(k ) }{dk } = \frac{a^2}{c} * cos (\frac{k* a}{2} )$

7 0

3 years ago

Name a chemical that she may use to control this disease

Deffense [45]

Answer:

Explanation:

Antiseptics, or skin disinfectants, are chemicals for cleaning the skin and wounds. They can kill or prevent the growth of microorganisms.

3 0

2 years ago

Read 2 more answers

How do shows and movies affect our lives? cons. answer honestly.:)

bezimeni [28]

We getting addicted so it keeps us from getting bored

3 0

3 years ago

Which of the following is constant during uniform circular motion?

tatuchka [14]

An object undergoing <span>uniform circular motion </span>is moving with a constant speed. Nonetheless, it is accelerating due to its change in direction. So I'm thinking velocity

8 0

2 years ago

1. A 4-N force is used to move an object 2 m in 10 s. Which of the following is the power generated while moving the object?

guajiro [1.7K]

Power is the work done per unit time. Therefore,

$\begin{gathered} p=\frac{w}{t} \\ \text{where} \\ w=\text{work done} \\ t=\text{time} \end{gathered}$

Therefore,

$\begin{gathered} \text{work done=fd} \\ f=force=4N \\ d=\text{displacement}=2m \\ t=2\sec s \\ p=\frac{fd}{t}=\frac{4\times2}{10}=\frac{8}{10}=0.8watts \end{gathered}$

4 0

1 year ago