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
adoni [48]
3 years ago
13

Una roca sobre una superficie de hielo está siendo tirada horizontalmente por tres cuerdas como se ve en la figura, donde F=95N,

F2=80N Y F3= 45N.
Determinar: si existe una fuerza resultante y si es el caso determinar magnitud y dirección.
Physics
1 answer:
KatRina [158]3 years ago
6 0
Hablas español??? or portuguese
You might be interested in
La energía cinética es la energía que presentan los cuerpos que se encuentran en movimiento.
myrzilka [38]
Do you speak a little English cuz I can’t help you if a can’t understand you
6 0
2 years ago
The height (in meters) of a projectile shot vertically upward from a point 2 m above ground level with an initial velocity of 22
alexgriva [62]
1) The law of motion of the projectile is
h(t) = 2+22.5 t-4.9 t^2
To find the velocity, we should compute the derivative of h(t):
v(t)=h'(t)=22.5-2\cdot 4.9t=22.5-9.8t
So now we can calculate the speed at t=2 s and t=4 s:
v(2.0s)=22.5-9.8\cdot2.0 =2.9 m/s
v(4.0s)=22.5-9.8\cdot 4.0s=-16.7 m/s
The negative sign in the second speed means the projectile has already reached its maximum height and it is now going downward.

2) The projectile reaches its maximum height when the speed is equal to zero:
v(t)=0
So we have
22.5-9.8 t=0
And solving this we find
t=2.30 s

3) To find the maximum height, we take h(t) and we just replace t with the time at which the projectile reaches the maximum height, i.e. t=2.30 s:
h(2.30 s)=2+22.5\cdot 2.30 -4.9 \cdot (2.30s)^2 = 27.83 m

4) The time at which the projectile hits the ground is the time at which the height is zero: h(t)=0. So, this translates into
2+22.5t -4.9 t^2 = 0
This is a second-order equation, and if we solve it we get two solutions: the first solution is negative, so we can ignore it since it's physically meaningless; the second solution is
t=4.68 s
And this is the time at which the projectile hits the ground.

5) The velocity of the projectile when it hits the ground is the velocity at time t=4.68 s:
v(4.68 s)=22.5-9.8\cdot 4.68 =-23.36  m/s
with negative sign, because it is directed downward.
8 0
3 years ago
4. A car, initially traveling east with a speed of
PilotLPTM [1.2K]

Answer:

150 m

Explanation:

Given,

u=5m/s

a=2m/s2

t=10s

v=?

s=?

Now,

v=u+at

=5+2×10

=5+20

=25m/s

So,

s=u+v/2×t

=5+25/2×10

=30/2×10

=15×10

=150m

5 0
2 years ago
How will the motion of the arrow change after it leaves the bow?
Pavel [41]

The string moves to the right, as it restores its original position with the median plane of the bow. As a result, the string "pulls" on the arrow with a force F2. 2. The tip of the arrow T moves slightly to the left.

pls thank me and brainliest me

4 0
3 years ago
Which phrase best describes a machine?
stepan [7]

Answer:

option 1 will be the answer.

Explanation:

hope it helps.

8 0
2 years ago
Read 2 more answers
Other questions:
  • When a circuit is arranged in parallel:
    10·1 answer
  • What type of energy is it when rain falls?
    7·1 answer
  • Plz help me with #4 it’s 15 points!!
    8·1 answer
  • What’s the difference between applied and pure research
    10·1 answer
  • A car has a momentum of 20,000 kg • m/s. What would the car’s momentum be if its velocity doubles?
    10·2 answers
  • The electric potential, when measured at a point equidistant from two particles that have charges equal in magnitude but of oppo
    6·1 answer
  • A tractor pulls a 978 kg wagon at a velocity of 4.9 m/s. How many watts of power are exerted by the tractor motor is the tractor
    10·1 answer
  • ???help???<br> \ /<br> lnl HELP PLS
    6·2 answers
  • when an apple falls towards the earth the earth moves up to meet the apple. Is it true? If yes, why is the earth motion not noti
    9·1 answer
  • 143°C = _____<br><br> 416 K<br> -130 K<br> 0 K<br> 143 K
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!