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
Tomtit [17]
3 years ago
14

Please , physics. A and B

Physics
1 answer:
stepladder [879]3 years ago
7 0

Answer:

a. -5,4

b. 28

Explanation:

(see how to solve in pic)

You might be interested in
Which statement about the image Formed by a plane mirror is correct?
lbvjy [14]

Answer:

The image is virtual

number-4

8 0
3 years ago
Need a little help here :(
Goshia [24]

Answer:

The output out be 200

Explanation:

Hope this helps :))

8 0
3 years ago
Read 2 more answers
A 45.0-kg girl is standing on a 168-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat,
muminat

Answer:

The speed of the plank relative to the ice is:

v_{p}=-0.33\: m/s

Explanation:

Here we can use momentum conservation. Do not forget it is relative to the ice.

m_{g}v_{g}+m_{p}v_{p}=0 (1)

Where:

  • m(g) is the mass of the girl
  • m(p) is the mass of the plank
  • v(g) is the speed of the girl
  • v(p) is the speed of the plank

Now, as we have relative velocities, we have:

v_{g/b}=v_{g}-v_{p}=1.55 \: m/s (2)

v(g/b) is the speed of the girl relative to the plank

Solving the system of equations (1) and (2)

45v_{g}+168v_{p}=0

v_{g}-v_{p}=1.55

v_{p}=-0.33\: m/s

I hope it helps you!      

8 0
3 years ago
A force vector points due east and has a magnitude of 140 newtons. A second force is added to . The resultant of the two vectors
ale4655 [162]

Answer:

(a) When the resultant force is pointing along east line, the magnitude and direction of the second force is 280 N East

(b)  When the resultant force is pointing along west line, the magnitude and direction of the second force is 560 N West

Explanation:

Given;

a force vector points due east, F_1 = 140 N

let the second force = F_2

let the resultant of the two vectors = F

(a) When the resultant force is pointing along east line

the second force must be pointing due east

F = F_1 + F_2\\\\F_2 = F - F_1\\\\F_2 = 420 \ N - 140 \ N\\\\F_2 = 280 \ N

F_2 = 280 \ East

(b) When the resultant force is pointing along west line

the second force must be pointing due west and it must have a greater magnitude compared to the first force in order to have a resultant in west line.

F = F_2 - F_1\\\\F_2 = F + F_1\\\\F_2 = 420 \ N + 140 \ N\\\\F_2 = 560 \ N

F_2 = 560 \ West

8 0
3 years ago
Brandon buys a new Seadoo. He goes 22 km north from the beach. He then goes 11km to the east. Then chases a boat 3 km north. Wha
KIM [24]

Answer:

36kms

Explanation:

22+1=33

33+3=36

6 0
3 years ago
Other questions:
  • Which temperature is warmer than the freezing point of water
    6·1 answer
  • How do mass and speed affect kinetic energy?
    14·2 answers
  • Which medium is the greatest threat to the printed newspaper?
    7·1 answer
  • In what order do the effort, fulcrum, and resistance appear on a second class lever?
    6·1 answer
  • Water from a fire hose is directed horizontally against a wall at a rate of 50.0 kg/s and aspeed of 42.0 m/s. Calculate the forc
    12·2 answers
  • what changes can be made to the transfer of energy as heat to a heat engine in order to increase the amount of work done by the
    14·1 answer
  • Calculate the force of an object that has a mass of 10kg and an acceleration of 4m/s²
    15·1 answer
  • A railroad car of mass 2.50∙10^4 kg is moving at a speed of 4.00 m/s. It collides and couples with three other coupled railroad
    6·1 answer
  • True or false<br><br>energy can neither be created nor be destroyed<br>​
    10·2 answers
  • Calcula el valor de la velocidad de las ondas sonoras en el agua sabiendo que su
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!