1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lilavasa [31]
3 years ago
5

Three blocks are sliding together to the right along a surface of negligible friction when a force with magnitude Fext is exerte

d to the left on the rightmost block, as shown in the figure. The masses of the blocks are indicated in the figure. If the force is exerted for a time Δt , what is the change in velocity of the center of mass of the three-block system?
A Fext/6mΔt

B Fext/2mΔt

C 2Fext/mΔt

D 6Fext/mΔt
Physics
1 answer:
alina1380 [7]3 years ago
5 0

Answer:

c

Explanation:

it is right.

the teacher said

You might be interested in
Consider a particle with initial velocity v⃗ that has magnitude 12.0 m/s and is directed 60.0 degrees above the negative x axis.
lina2011 [118]

Answer:

-6.0 m/s, 10.4 m/s

Explanation:

To find the x- and y- components, we have to apply the formulas:

v_x = v cos \theta

v_y = v sin \theta

where

v = 12.0 m/s is the magnitude of the vector

\theta is the angle between the direction of the vector and the positive x-axis

Here, the angle given is the angle above the negative x-axis; this means that the angle with respect to the positive x-axis is

\theta=180^{\circ} - 60^{\circ} = 120^{\circ}

So, the two components are:

v_x = (12.0 m/s) cos 120^{\circ}=-6.0 m/s

v_y = (12.0 m/s) sin 120^{\circ}=10.4 m/s

5 0
3 years ago
Suppose that a 1000 kg car is traveling at 25 m/s (aprox 55mph). Its brakes can apply a force of 5000N. What is the minimum dist
Brrunno [24]

Assuming the the car is travelling to the right (→):

R(\rightarrow), F = ma

\implies a =  \frac{F}{m}

=  \frac{-5000}{1000}

= -5 \ ms^{-2}

The information we know:

u = 25 \ ms^{-1}

v = 0

a = -5 \ ms^{-2}

Using one of the equations of motion:

v^2 = u^2 + 2as

\implies s = \frac{v^2 -u^2}{2a}

=  \frac{0^2 - 25^2}{2\times (-5)}

=  \frac{625}{10}

= 62.5\ m

8 0
3 years ago
Read 2 more answers
Are anxiety disorder curable
Anvisha [2.4K]

Anxiety Disorder is treatable, not curable.

7 0
3 years ago
Who exerts more pressure? a) A girl of 50 kg, wearing heels with an area of 1 cm2. b) An elephant of 4000 kg with foot area of 2
Mrrafil [7]

Answer:

The girl exerts more pressure.

Explanation:

Pressure can be defined as the force exerted normally or perpendicularly per unit area.

i.e P = F/A

<u>Girls</u>

Area of the heel = 1cm² = 10^(-4) m²

Force = mg = 50 × 10 = 500N

Pressure =

\frac{500}{10 ^{ - 4} }

= 5 \times  {10}^{6}

<u>Elephant</u>

<u>Area</u><u> </u><u>=</u><u> </u><u>2</u><u>5</u><u>0</u><u>cm</u><u>²</u><u> </u><u>=</u><u> </u><u>2</u><u>.</u><u>5</u><u> </u><u>x</u><u> </u><u>1</u><u>0</u><u>^</u><u>(</u><u>-</u><u>2</u><u>)</u><u>b</u><u> </u><u>m</u><u>²</u>

<u>Force</u><u> </u><u>=</u><u> </u><u>mg</u><u> </u><u>=</u><u> </u><u>4</u><u>0</u><u>0</u><u>0</u><u>0</u><u>N</u>

<u>Pressure</u><u> </u><u>=</u><u> </u>

<u>\frac{40000}{2.5 \times  {10}^{ - 2} }</u>

<u>= 1.6 \times  {10}^{6}</u>

5 0
3 years ago
What is the function or the skeletal system hdbdb
yKpoI14uk [10]

Explanation:

Hope its helps u

if wrong then sry

5 0
3 years ago
Other questions:
  • A car started from a rest and accelerated at 9.54 m/s2 for 6.5 seconds. How much distance was covered by the car?
    8·1 answer
  • A parallel plate flow chamber is being designed to study the adhesion of leukocytes to endothelium. The channel width is 2cm; th
    11·1 answer
  • A car drives horizontally off a 73-m-high cliff at a speed of 27 m/s. Ignore air resistance. How long will it take the car to hi
    8·1 answer
  • When tuning a guitar, by comparing the frequency of a string that is struck against a standard sound source (of known frequency)
    7·1 answer
  • Calculate time period of a simple pendulum if it takes 72 seconds to complete 24 oscillations
    9·1 answer
  • A 1 mF, a 2 mF, and a 3 mF capacitor are connected in parallel, the combination being
    7·2 answers
  • A large truck collides head-on with a small compact car. During the collision: (A) the truck exerts a greater amount of force on
    9·1 answer
  • Part B<br> Do the atoms in salt follow a pattern?
    6·1 answer
  • Calculate the conductivity of the wire having length 10m , radius 20mm and resistance 2.4umor​
    12·1 answer
  • What type of object is called the object at rest​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!