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
alekssr [168]
3 years ago
13

3 kids are pushing on a cart 2 are pushing north at 50 N each. The 3rd is pushing South at -90 N. The net force is _N?

Physics
1 answer:
scoray [572]3 years ago
6 0

Answer:

Explanation:

When two forces act in the same direction , they add up and when they act in opposite direction , they subtract .

2 forces each of 50 N act in same direction , so they will add up to give resultant force of 100 N . Now third force acts in opposite direction so 100 N and - 90 N will subtract to give total resultant force .

Resultant force = 100 - ( - 90 ) = 190 N

So net force or resultant force = 190 N .

You might be interested in
A force of 1.150×103 N pushes a man on a bicycle forward. Air resistance pushes against him with a force of 795 N. If he starts
nalin [4]

Answer:

He has a speed of 16.60m/s after 35.0 meters.

Explanation:

The final velocity can be determined by means of the equations for a Uniformly Accelerated Rectilinear Motion:

v_{f}^{2} = v_{i}^{2} + 2ad        

v_{f} = \sqrt{v_{i}^{2} + 2ad}  (1)

The acceleration can be found by means of Newton's second law:

\sum F_{net} = ma

Where \sum F_{net} is the net force, m is the mass and a is the acceleration.

Fx + Fy = ma  (2)

All the forces can be easily represented in a free body diagram, as it is shown below.

Forces in the x axis:

F_{x} = F - F_{air}  (3)

Forces in the y axis:

F_{y} = 0 (4)

Solving for the forces in the x axis:

F_{x} = F - F_{air}

Where F = 1.150x10^{3} N and F_{air} = 795 N:

F_{x} = 1.150x10^{3} N - 795 N

F_{x} = 355 N

Replacing in equation (2) it is gotten:

Fx + Fy = ma

355 N + 0 N = (90.0 Kg)a

355 N = (90.0 Kg)a

a = \frac{355 N}{90.0Kg}

a = \frac{355 Kg.m/s^{2}}{90.0Kg}

a = 3.94 m/s^{2}

So the acceleration for the cyclist is 3.94 m/s^{2}, now that the acceleration is known, equation (1) can be used:

v_{f} = \sqrt{v_{i}^{2} + 2ad}

However, since he was originally at rest its initial velocity will be zero (v_{i} = 0).

v_{f} = \sqrt{2ad}

v_{f} = \sqrt{2(3.94m/s^{2})(35.0m)}

v_{f} = 16.60m/s

He has a speed of 16.60m/s after 35.0 meters

8 0
3 years ago
Wavelength multiplied by frequency equals
Kruka [31]
Wavelength × frequency = speed
4 0
3 years ago
At time t = 1, a particle is located at position (x, y) = (5, 2). If it moves in the velocity field F(x, y) = xy − 1, y2 − 11 fi
Amanda [17]

Answer:

Its approx location is (5.18,1.9)

Explanation:

Using F( 5,2) = ( xy-1, y²-11)

= ( 5*2-¹, 2²-11)

= (9,-5)

= so at point t=1.02

(5,2)+(1.02-1)*(9,-5)

(5,2)+( 0.02)*(9,-5)

(5+0.18, 2-0.1)

= ( 5.18, 1.9)

3 0
3 years ago
The knights of labor do not believe in arbitration but believed in strikes? true or false
Rus_ich [418]

Answer - The given statement is false.  

Explanation-

The members of knight of labour were opposing strikes and had a belief or boycott or arbitration.

A secret society was formed in 1869 by the tailors in Philadelphia and named Knights of labour. This union Organisation was formed to to get rights over equal pay if work is equal, abolish child labour, Work time of 8 hours and some graduated income tax  reforms. This union was vertically organized.

5 0
3 years ago
Water boils to power a steam engine. Which statement best describes the changes in the water as it boils?
hammer [34]

Option B

kskmsnsnsmjsjsn

8 0
3 years ago
Read 2 more answers
Other questions:
  • If a comet is close to the sun how fast might it travel?
    5·1 answer
  • Why can't passenger planes fly very high?
    13·2 answers
  • Which of the Moon’s positions will cause the highest or spring tides?
    13·2 answers
  • Two students are sitting 1.50 m apart. One student has a mass of 70.0 kg and the other has a mass of 52.0 kg. What is the gravit
    6·1 answer
  • How do I find the resultant force of a skydiver falling with gravity constant of 10 newtons and his weight is 70 kg??
    5·1 answer
  • The element oxygen, represented by the symbol O, is classified as
    8·2 answers
  • 2. In a famous letter to Robert Hooke, Isaac Newton wrote, "If I have seen further it is only by standing on the shoulders of gi
    12·1 answer
  • What is the geocentric angle of the earthquake focus?​
    14·1 answer
  • The engines of airplanes are made of materials called superalloys. Do some
    6·1 answer
  • The 3kg object in figure is released from rest at height of on a curved frictionless ramp. at the foot of the ramp is a spring o
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!