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
xxMikexx [17]
3 years ago
6

A force F→=(cx-3.00x2)iˆ acts on a particle as the particle moves along an x axis, with F→ in newtons, x in meters, and c a cons

tant. At x = 0 m, the particle's kinetic energy is 20.0 J; at x = 2.00 m, it is 11.0 J. Find c.
Physics
2 answers:
DerKrebs [107]3 years ago
6 0

Answer:

Explanation:

Work done = ∫Fdx

= ∫(cx-3.00x²)   dx

[ c x² / 2 - 3 x³ / 3 ]₀²

= change in kinetic energy

= 11-20

= - 9 J

[ c x² / 2 -  x³   ]₀² = - 9

c x 2² / 2 - 2³ = -9

2c - 8 = -9

2c = -1

c = - 1/2

ohaa [14]3 years ago
5 0

Answer:

Explanation:

F = cx - 3x²

At x = 0 , Kinetic energy = 20 J

at x = 2 m, the kinetic energy = 11 J

Use work energy theorem

W = \int_{0}^{2}F(x) dx = \Delta K

W = \int_{0}^{2}(cx-3x^{2}) dx = 11-20

\frac{cx^{2}}{2}-x^{3}=-9

2c - 8 = - 9

2c = - 1

c = - 0.5

You might be interested in
What is the objective lens?
Monica [59]

Answer:

The objective lens is an optical tool used to focus an image.

Explanation:

The objective lens is an optical tool that collects light emitted by an object under observation and focuses the  rays of light in order to form a real and magnified image  They are used in optical instruments like microscopes, cameras, telescopes, etc. and are also referred as objective or object glasses.

5 0
2 years ago
Two stationary point charges of 3.00 nC and 2.00 nC are separated by a distance of 50.0 cm. An electron is released from rest at
andrew-mc [135]

Answer:

1. the electric potential energy of the electron when it is  at the midpoint is - 2.9 x 10^{-17} J

2. the electric potential energy of the electron when it is 10.0 cm from the 3.00 nC charge is - 5.04 x  10^{-17} J

Explanation:

given information:

q_{1} =  3 nC = 3 x 10^{-9} C

q_{2} =  2 nC = 2 x 10^{-9} C

r = 50 cm = 0.5 m

the electric potential energy of the electron when it is  at the midpoint

potential energy of the charge, F

F = k \frac{q_{e}q}{r}

where

k = constant (8.99 x 10^{9} Nm^{2} /C^{2})

electron charge, q_{e} = - 1.6 x 10^{-19} C

since it is measured at the midpoint,

r = \frac{0.5}{2}

  = 0.25 m

thus,

F = F_{1}+ F_{2}

  = k\frac{q_{e} q_{1} }{r} + k\frac{q_{e} q_{2} }{r}

  = \frac{kq_{e} }{r} (q_{1} +q_{2})

  = (8.99 x 10^{9})( - 1.6 x 10^{-19} )(3 x 10^{-9} +2 x 10^{-9})/0.25

  = - 2.9 x 10^{-17} J

the electric potential energy of the electron when it is 10.0 cm from the 3.00 nC charge

r_{1} = 10 cm = 0.1 m

r_{2} = 0.5 - 0.1 = 0.4 m

F = k\frac{q_{e} q_{1} }{r} + k\frac{q_{e} q_{2} }{r}

  = kq_{e}(\frac{q_{1} }{r_{1} }+\frac{q_{2} }{r_{2} })

  = (8.99 x 10^{9})( - 1.6 x 10^{-19} )(3 x 10^{-9} /0.1+2 x 10^{-9}/0.4)

  = - 5.04 x  10^{-17} J

3 0
2 years ago
The fact that Mercury has no atmosphere is evidence that it _____.
Naddika [18.5K]
We want to know what does the fact that Mercury has no atmosphere tell us. Since Mercury has no atmosphere it cant reflect a lot of sunlight that is hitting its surface. Its constantly being hit by solar wind. So Mercury reflects a small percentage of the sunlight that strikes it. 
7 0
3 years ago
Read 2 more answers
Part D
anygoal [31]

Answer: I didn't see a difference because the large ball's vertical displacement and velocity are the same as the small one's.

Explanation:

5 0
2 years ago
What nuclear weapon is the biggest and who currently owns this bomb
erma4kov [3.2K]
The RDS-220 <span>hydrogen bomb, soviet </span>
5 0
3 years ago
Other questions:
  • Describe how kinetic and potential energy change as a diver climbs up to a diving board and then dives into the water below.
    10·2 answers
  • Gravitational force is determined by which of the following
    6·1 answer
  • How long will it take to go 150 km [E] traveling at 50 km/hr?
    12·2 answers
  • Why is it harder to hear someone through a wall?
    11·1 answer
  • In an isolated system, two cars, each with a mass of 1,500 kg, collide. Car 2 is
    8·2 answers
  • A 4.2-m-diameter merry-go-round is rotating freely with an angular velocity of 0.79 rad/s . Its total moment of inertia is 1790
    9·1 answer
  • Ball 1 is thrown to the ground with an initial downward speed; ball 2 is dropped to the ground from rest.
    9·1 answer
  • Consider two closely spaced and oppositely charged parallel metal plates. The plates are square with sides of length L and carry
    7·1 answer
  • What is another word for a change in velocity/change in time
    9·2 answers
  • What is the full moon that occurs during the autumn equinox called?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!