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
kotegsom [21]
3 years ago
8

If Vector A (6,4) and Vector B is (-2, -1), what is A-B

Physics
1 answer:
tatyana61 [14]3 years ago
6 0

Answer:

(8,5)

Explanation:

Think of it as a simpler algebra problem with parentheses. What you are doing is (6,4)-(-2,-1)

so lets DISTRIBUTE this negative sign to (-2, -1)

we get: (6,4)+(2,1)

add the x values and add the y values

(8,5)

You might be interested in
There are two main types of exercise: (1) exercise, which uses oxygen for energy, and (2) exercise, which does not.
Goryan [66]

Answer:

b

Explanation:

6 0
3 years ago
Read 2 more answers
What would happen if guard cells in a plant stopped working
lions [1.4K]
I am fairly certain that the plant would lose water and that gas flow and such would occur

5 0
3 years ago
Convert 3402kgm/s to 20000Newtons
oee [108]

The 3,402 has units of kg-m/s.  That's momentum.  The 20,000 has units of Newtons.  That's force.  Momentum and force are different physical things, and you can't convert them from one to the other.

The best I can do for you is something like this:

Let's say you have a moving object with 3,402 kg-m/s of momentum, and you want to STOP it completely.  You want to stand in front of it and push back on it, hard enough and for long enough to CHANGE its momentum from 3,402 kg-m/s to zero.

Also ... there's a limit to how hard you can push.  The most force you can exert is 20,000 Newtons.

The amount you'll change its momentum is called the <u><em>impulse</em></u> you give it.  The quantity of impulse is (force) x (length of time you push on it).

So you need to keep pushing it back for (T seconds) long enough so that

(20,000 Newtons of force) x (T seconds) = 3,402 kg-m/s of momentum .

Divide each side of that equation by (20,000 Newtons). Then it says:

(T seconds) = (3,402 kg-m/s) / (20,000 Newtons)

<em>T = 0.1701 second</em>

And that's how you provide just enough impulse to stop the flying object ... push on it with 20,000 Newtons of force for exactly 0.1701 second, and it loses all its momentum and falls out of the air onto the ground at your feet.

This story is the closest I can come to anything that looks like "convert"ing momentum into force.

3 0
3 years ago
A dynamite blast at a quarry launches a rock straight upward, and 1.7 s later it is rising at a rate of 17 m/s. Assuming air res
Shtirlitz [24]

Answer:

(a) v_0= 34m/s

(b) v=14m/s

Explanation:

We can derive the initial speed of the rock from the equation of the speed in function of the time:

v=v_0-gt\\\\\implies v_0=v+gt

Using the given values for the speed at time t=1.7s, we get:

v_0=17m/s+(9.8m/s^{2})(1.7s)=34m/s

In words, the speed of the rock at launch is 34m/s (a).

Next, we use this to calculate the speed at t=4.9s:

v=v_0-gt\\\\v= 34m/s-(9.8m/s^{2})(4.9s)=-14m/s

This means that the speed of the rock at 4.9s after the launch is 14m/s (b), and the negative sign means that it is moving downwards.

3 0
3 years ago
a parent swings a 18.5 kg child in a circle of radius 1.05m, making 5 revolutions in 13.4s. what centripetal acceleration does t
Zolol [24]

Answer: 0.146 m/s^{2}

Explanation:

The <u>centripetal acceleration</u> a_{c} of an object moving in a uniform circular path is given by the following equation:

a_{c}=\frac{V^{2}}{r}  (1)

Where:

V is the tangential velocity

r=1.05 m is the radius of the circle

On the other hand, the tangential velocity  is expressed as:

V=\omega r (2)

Where \omega is the angular velocity, which can be found knowing the child makes 5 revolutions in 13.4s:

\omega=\frac{5 rev}{13.4 s}=0.37 rev/s (3)

Substituting (3) in (2):

V=(0.37 rev/s)(1.05 m) (4)

V=0.39 m/s (5)

Substituting (5) in (1):

a_{c}=\frac{(0.39 m/s)^{2}}{1.05 m}  (6)

Finally:

a_{c}=0.146 m/s^{2}  

6 0
3 years ago
Read 2 more answers
Other questions:
  • The three-toed sloth is the slowest moving land mammal. On the ground, the sloth moves at an average speed of 0.037 m/s, conside
    6·1 answer
  • Which of the following is not an example of an abiotic factor? a. plants b. air c. temperature d. soil Please select the best an
    7·2 answers
  • An object is accelerating at a rate of 8m/s^2 when suddenly has the net force upon increased by a factor of 2
    11·1 answer
  • 10. A cyclist travels at 15m/s for 4 minutes. How far does she go?
    6·1 answer
  • Do electric field lines actually exist?​
    7·1 answer
  • How did Mendeleev organize the elements to create a periodic table
    6·2 answers
  • If a car starts from a stop, and hits 27 meters per second in 8 seconds, what is its acceleration?​
    8·1 answer
  • The Atwood machine consists of two masses hanging from the ends of a rope that passes over a pulley. The pulley can be approxima
    6·1 answer
  • A pair of point charges, which have charges of –3µ C and –4µ C are separated by 2 cm. What is the value of the force between the
    10·1 answer
  • Explain two ways friction can be reduced
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!