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
Ira Lisetskai [31]
3 years ago
6

A toy gun uses a spring to project a 5.9-g soft rubber sphere horizontally. The spring constant is 8.0 N/m, the barrel of the gu

n is 17 cm long, and a constant frictional force of 0.035 N exists between barrel and projectile. With what speed does the projectile leave the barrel if the spring was compressed 5.7 cm for this launch?
Physics
2 answers:
LekaFEV [45]3 years ago
8 0

Answer:

Explanation:

Stored energy in spring = 1/2 k x² , k is spring constant , x is compression.

= 1/2 x 8 x (5.7 x 10⁻²)²

= 129.96 x 10⁻⁴ J

Energy lost due to friction = force x distance

= .035 x .17

= .00595 J

Energy used in providing kinetic energy to projectile.  

129.96 x 10⁻⁴  - .00595

.012996 - .00595

= .007046 J

So

1/2 m v² = .007046

v² = .007046  x 2 / .0059

= 2.3885

v = 1.545 m /s

Marta_Voda [28]3 years ago
7 0

Answer:

Explanation:

mass, m = 5.9 g = 0.0059 kg

Spring constant, K = 8 N/m

length of barrel, s = 17 cm = 0.17 m

frictional force, f = 0.035 N

Compression in spring, Δs = 5.7 cm = 0.057 m

let the speed of the projectile is v.

Energy stored in the spring, E = 0.5 KΔs²

E = 0.5 x 8 x 0.057 x 0.057 = 0.012996 J

Work done by the friction force, W = f x s = 0.035 x 0.17 = 0.00595 J

Energy used to move the projectile, E' = E - W

E' = 0.012996 - 0.00595 = 0.007046 J

E' = 1/2 mv²

0.007046 = 0.5 x 0.0059 x v²

v² = 2.3885

v = 1.55 m/s

You might be interested in
Convert 27,549 into scientific notation
dezoksy [38]
2.7549 x 10^4 is the answer I hope this helped u
7 0
2 years ago
A car accelerates from 20mi/hr to 60mi/hr. How many times greater is the car's kinetic energy at the higher speed compared to th
Ainat [17]

Answer:

9 times

Explanation:

Kinetic energy is:

KE = ½ mv²

When we triple the velocity, the kinetic energy increases by a factor of 9.

9KE = ½ m(3v)²

4 0
2 years ago
water has an index of refraction of 1.33. What is the critical angle for light leaving a pool of water into air? 0 37 90 49
vesna_86 [32]
When light travels from a medium with higher refractive index into a medium with lower refractive index, there is a maximum angle (called critical angle) for which all the light is reflected, so there is no refraction.

The value of the critical angle is given by:
\theta = \arcsin ( \frac{n_2}{n_1} )
when n1 is the refractive index of the first medium, while n2 is the refractive index of the second medium. In our case, n1=1.33 (the water) and n1=1.00 (the air). Putting numbers in, we get
\theta = \arcsin ( \frac{1.00}{1.33} )=49^{\circ}
6 0
3 years ago
What are two advantages of using renewable resources?
Pavel [41]
One advantage is that whatever resource it is, it will never run out and you wont have to worry about not having it. A second is that there is going to be enough for everyone to use however much they want without there having to be a limit on how much you use.
3 0
3 years ago
Please help as soon as possible
pochemuha

Answer:

Family Behaviors.

Explanation:

Family behaviors, such as the way you were raised and the ideas your family has about exercise, may influence your own ideas about exercise.

Family behaviors influence your ideas or actions for the future.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement describes one feature of a closed circuit? Charges do not flow. Bulbs will not shine. The circuit is broken. The
    13·2 answers
  • An AC power source has an rms voltage of 120 V and operates at a frequency of 60.0 Hz. If a purely inductive circuit is made fro
    5·1 answer
  • (will mark brainliest)Which of the following has the most potential energy?
    13·2 answers
  • A steel ball of mass 0.1 kg falls from a height of 1.8metres
    9·1 answer
  • In which century was the DNA database established?
    8·1 answer
  • Every force has one and only one 3rd law pair force.
    12·2 answers
  • PLS ANSWER FAST WILL GIVE BRAINLY!!!!!!!
    9·2 answers
  • El extremo de una cuerda se mueve de tal manera que las partículas de la cuerda emplean 0.25 segundos para producir una vibració
    6·1 answer
  • Question 9
    15·1 answer
  • Can you answer this math homework? Please!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!