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
n200080 [17]
4 years ago
8

A 1.5 kilogram cart initially moves at 2.0 meters per second. It is brought to rest by a constant net forcé in 3.0 second. What

is the magnitude of the net force ?
Physics
1 answer:
lubasha [3.4K]4 years ago
3 0

The net force on the cart is

                   Force = (mass) x (acceleration) .

We know the mass = 1.5 kilogram, but we need to
calculate the acceleration.

               Acceleration = (change in speed) / (time for the change)

Change in speed = (ending speed) minus (beginning speed)

                               =    ( 0 )  -  ( 2 m/s )  =   -2 m/s

Acceleration =  (change in speed) / (time for the change)

                       =       ( -2 m/s )   /   (3 sec)

                       =           - 2/3  m/s² .

Finally ...        Net force = (mass) x (acceleration)

                                       =  (1.5 kilogram) x ( - 2/3 m/s²)

                                       =  ( - 3/2 x 2/3 )  (kg-m/s²)

                                       =       - 1  newton .

The negative sign on the force means the force is applied
opposite to the direction the cart is moving.  That gives
negative acceleration (slowing down), and the cart
eventually stops.   

You might be interested in
If jesus could walk on water, can he swim on land?
timurjin [86]

Answer:

lol

Explanation:

ok well Jesus considered himself and his disciples fishers of men, so i'd say he swam with the fishies on land everytime he had a mob of people listening lollllll

3 0
3 years ago
Read 2 more answers
A plane is flying due west at 34 m/s. It encounters a wind blowing at 19 m/s south. Find the resultant veloci
Drupady [299]

Answer:

<em>The resultant velocity has a magnitude of 38.95 m/s</em>

Explanation:

<u>Vector Addition</u>

Given two vectors defined as:

\vec v_1=(x_1,y_1)

\vec v_2=(x_2,y_2)

The sum of the vectors is:

\vec v=(x_1+x_2,y_1+y_2)

The magnitude of a vector can be calculated by

d=\sqrt{x^2+y^2}

Where x and y are the rectangular components of the vector.

We have a plane flying due west at 34 m/s. Its velocity vector is:

\vec v_1=(-34,0)

The wind blows at 19 m/s south, thus:

\vec v_2=(0,-19)

The sum of both velocities gives the resultant velocity:

\vec v =(-34,-19)

The magnitude of this velocity is:

d=\sqrt{(-34)^2+(-19)^2}

d=\sqrt{1156+361}=\sqrt{1517}

d = 38.95 m/s

The resultant velocity has a magnitude of 38.95 m/s

3 0
3 years ago
An object is realsed From rest . how far does it fall during the second second of fall?​
Savatey [412]

Answer:

14.715 m

Explanation:

Assume that the acceleration due to gravity is 9.81 m/s^2 downwards, take downwards as positive

First second:

v = u + at

v = 9.81 m/s

Second second:

s = ut + (1/2)at^2

s = 9.81(1) + (1/2)(9.81)(1)^2

s = 14.715 m

6 0
3 years ago
Suppose a star the size of our Sun, but of mass 9.0 times as great, were rotating at a speed of 1.0 revolution every 17 days. If
Tanya [424]
Use the conservation of angular momentum; angular momentum at the beginning = angular momentum at the end 
Conservation of angular momentum: 
I1 w1 = I2 w2 
Where I is the moment of inertia. For a sphere, I=2/5 m R^2. Substituting into the equation above we get 
w2 = I1 w1 / I2 = w1 m1 R1^2 / (m2 R2^2) 
w2 = w1 4 * (R1/R2)^2
= 4*(1)*(7E5/7.5)^2
= 3.48E10 revs/(17days)
= 2.04705882 x 10^9 revs/sec
4 0
3 years ago
Acceleration can be defined as the rate at which velocity ________
EleoNora [17]

Acceleration is the rate of the change in velocity.

The answer would be the rate at which velocity changes.

7 0
4 years ago
Read 2 more answers
Other questions:
  • When heavy rain follows a dry season in the mountains, the land can change abruptly. For example, a _______ can rush downhill as
    14·2 answers
  • The definition of an electric field is based upon what law?
    12·2 answers
  • Friction between solids can be most accurately defined as the force that
    5·1 answer
  • What is the difference in blood pressure (mm-hg) between the bottom of the feet and the top of the head of a 1.87-m-tall person
    7·1 answer
  • What can you conclede about the freezing point of ocean water
    14·1 answer
  • What makes a submarine dive?
    8·1 answer
  • 3. A football is kicked with a speed of 35 m/s at an angle of 40°.
    13·1 answer
  • А pressure gauge with a measurement range of 0-10 bar has a quoted inaccuracy of £1.0% f.s. (+1% of full-scale reading). (a) Wha
    9·1 answer
  • Define mixture, heterogeneous, homogeneous, solution, colloid, suspension, solvent, solute, saturation.( please don't answer the
    10·2 answers
  • 4. If a player has more mass they will also have more ____
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!