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
goldenfox [79]
3 years ago
6

Kecepatan sebuah benda dinyatakan dengan persamaan vx=8t+2 vy=12+2t, jika posisi awal pastikel (2,5), maka posisi benda pada saa

t t=4s adalah?
Physics
1 answer:
Vlad1618 [11]3 years ago
8 0
X = 2
y = 5

persamaan 1 : vx = 8t + 2 , x = 2 dan t = 0 karena posisi awal
                      2v = 8(0) + 2
                      2v = 2
                       v1 = 1

persamaan 2 : vy = 12 + 2t , y = 5 dan t = 0 karena posisi awal
                     5v = 12 + 2(0)
                     5v = 12
                     v2 = 2,4
masukin pada persamaan t = 4 dengan menggunakan v1 (v pada x) dan v2 (v pada y)
vx = 8t + 2 , t = 4 dan v = 1
1x = 8(4) + 2
x = 32 + 2
x = 34

vy = 12 + 2t , t = 4 dan v = 2,4
2,4y = 12 + 2(4)
2,4y = 20
y = 8,33

maka (x,y) = (34 ; 8,33) pada t = 4

You might be interested in
A thin cylindrical shell and a solid cylinder have the same mass and radius. The two are released side by side and roll down, wi
Vitek1552 [10]

Answer:

Explanation:

Let the velocity be v

Total energy at the bottom

= rotational + linear kinetic energy

= 1/2 Iω² + 1/2 mv² ( I moment of inertia of shell  = mr² )

= 1/2 mr²ω² + 1/2 mv² ( v = ω r )

= 1/2 mv² +1/2 mv²

= mv²

mv² = mgh ( conservation of energy )

v² = gh

v = √gh

= √9.8 x 1.8

= 4.2 m /s

8 0
3 years ago
What phase difference between two otherwise identical harmonic waves, moving in the same direction along a stretched string, wil
lora16 [44]

Answer:

\theta=145

Explanation:

The amplitude of he combined wave is:

B=2Acos(\theta/2)\\

A, is the amplitude from the identical harmonic waves

B, is the amplitude of the resultant wave

θ, is the phase, between the waves

The amplitude of the combined wave must be 0.6A:

0.6A=2Acos(\theta/2)\\ cos(\theta/2)=0.3\\\theta/2=72.5\\\theta=145

5 0
3 years ago
Which is an example of qualitative data?
LiRa [457]
The answer is C)the rating that the golfers give Callaway clubs
6 0
2 years ago
When you rub a plastic rod with fur, the plastic rod becomes negatively charged and the fur becomes positively charged. As a con
Yuri [45]

Answer: C. the rod gains mass and the fur loses mass.

Explanation:Atomic particles have mass. The electron has a mass that is approximately 1/1836 that of the proton and with exchange exchange of charge this is also factored in. The movement of effect described above is known as the triboelectic charging process—charging by friction—which results in a transfer of electrons between the two objects when they are rubbed together. Plastic having a much greater affinity for electrons than animal fur pulls electrons from the atoms of fur, leaving both objects with an imbalance of charge. The plastic rod would have an excess of electrons and the fur has a shortage of electrons. Having an excess of electrons, the plastic is charged negatively and has more mass. In the same vein, the shortage of electrons on the fur leaves it with a positive charge and consequently with lesser mass.

4 0
3 years ago
Melissa's favorite exercise equipment at the gym consists of various springs. in one exercise, she pulls a handle grip attached
konstantin123 [22]

The formula for force exerted on/by a spring is 

F = k*e where k is the spring constant and x is the distance stretched from unstrained position. This should allow you to find what you need.

 

Using F = k x e, 


where k is the spring constant, 


and e is the extension, 


The F is her weight = 45 X 0.80 


= 36 N

6 0
3 years ago
Other questions:
  • How does noise affect signals? what happens if the level of noise becomes too high relative to the strength of the signal.
    14·1 answer
  • While riding on an elevator descending with a constant speed of 2.7 m/s , you accidentally drop a book from under your arm. How
    11·1 answer
  • a proton moves in a circle of radius 0.4 when it enters a region with a magnetic field of 1.0t which points into the plane the s
    15·1 answer
  • How much work is done to move 3c of charge through a potential difference of 1.5v
    11·1 answer
  • HURRY! PLEASE HELP!!!!<br><br><br> 3. What methods are you using to test this (or each) hypothesis?
    12·1 answer
  • Protons are______<br> charged particles.
    8·2 answers
  • Moving current has electrical energy.
    6·1 answer
  • What is the answer to the question ?
    11·1 answer
  • DESPERATE WILL GIVE BRAINLIST AND THANKS
    9·1 answer
  • Which feature of a heating curve indicates a change of state
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!