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
Novosadov [1.4K]
3 years ago
8

A toy gun uses a spring to project a 6.4 g soft rubber sphere horizontally. The spring constant is 9.0 N/m, the barrel of the gu

n is 12.4 cm long, and a constant frictional force of 0.028 N exists between barrel and projectile. With what speed does the projectile leave the barrel if the spring was compressed 5.0 cm for this launch? (Assume the projectile is in contact with the barrel for the full 12.4 cm.)
Physics
1 answer:
8_murik_8 [283]3 years ago
5 0

Answer:

1.584 m/s.

Explanation:

Using,

Ek= Ws-Wf...................... Equation 1

Where Wf = work done against friction, Ek = kinetic energy of the rubber, Ws = work done by the spring.

1/2mv² = 1/2ke²-F'd................ Equation 2

Where m = mass of the rubber, v = velocity of the rubber, k = force constant of the spring, e = compression, F' = force of friction, d = distance/ length of contact.

make v the subject of the equation

v = √[2(1/2ke²-F'd)/m].................... Equation 3

Given: k = 9 N/m. e = 5 cm = 0.05 m, F' = 0.028 N, d = 12.4 cm = 0.124 m, m = 6.4 g = 0.0064 kg

Substitute into equation 3

v = √[2(1/2×9×0.05²-0.026×0.124)/0.0064]

v = √(2[0.01125-0.003224]/0.0064)

v = √2.508125

v = 1.584 m/s.

You might be interested in
If an area has all the wolves that it can support the wolf population has reached is what
Liono4ka [1.6K]
The wolf population in that area has reached its carrying capacity.
7 0
3 years ago
Read 2 more answers
URGENT!!!!! If a 6 Ω resistor is in a circuit connected to a voltage source, and the current through the circuit is 2 amps, what
Eduardwww [97]

Answer:

Explanation:

according to ohms law we know that

v=IR

given current =2 amps

given resistance =6Ω

so voltage is

v=2*6 =12 V

3 0
3 years ago
A kid pulls on a rope with 20 newtons of force. The block and tackle system pulls up a 160 newton box. What is the mechanical ad
Minchanka [31]
Answer:
The mechanical advantage of the system is 8

Explanation:
the mechanical advantage measures how much the system multiplies the input force to get the output.

In the given:
The input force (effort) is 20 Newton
The output force (load) is 160 Newton

This means that the mechanical advantage is:
mechanical advantage = load / effort = 160 / 20 = 8

Note that the mechanical advantage is unit-less (has no unit) since it is a ratio between two forces.

Hope this helps :)
3 0
3 years ago
A stone is dropped from a bridge and hits the pavement below in two seconds. What is the velocity of the stone when it hits the
Helen [10]
We have: a = v/t
Here, t = 2 s  [ Given ]
a = 9.8 m/s²  [constant value for earth system ]

Substitute their values into the expression:
9.8 = v/2
v = 9.8 × 2
v = 19.6 m/s

In short, Your Answer would be Option B

Hope this helps!
4 0
3 years ago
Read 2 more answers
BRAINLIEST+10PTS: does ozone absorb just harmful UV rays? Or just a random portion of UV?
emmasim [6.3K]

Answer:As sunlight passes through the atmosphere, all UVC and most UVB is absorbed by ozone, water vapour, oxygen and carbon dioxide. UVA is not filtered as significantly by the atmosphere. Is there a connection between ozone depletion and UV radiation? Ozone is a particularly effective absorber of UV radiation.

Explanation:

I had old notes

4 0
2 years ago
Read 2 more answers
Other questions:
  • My parrot has a mass of 1.33kg, what is it's weight here on earth​
    6·1 answer
  • 2. With regard to the pH scale, a solution with a pH
    6·1 answer
  • What is the focal length of the mirror? follow the sign conventions?
    9·1 answer
  • A ball is thrown upward in the air, and its height above the ground after t seconds is H ( t ) = 63 t − 16 t 2 feet. Find the ti
    7·1 answer
  • Initially, 0.05kg of air is contained in a piston cylinder device at 200 oc and 1.6 mpa. the air then expands at constant temper
    6·1 answer
  • State Archimedes' principle
    12·1 answer
  • Which two energy sources together provide more than 50% of the energy needs of the United States?
    11·1 answer
  • how does the graph of displacement versus time look for something moving at a constant positive velocity
    8·1 answer
  • A bungee cord can stretch, but it is never compressed. When thedistance between the two ends of the cord is less than its unstre
    10·1 answer
  • Using knowledge of states of matter,write a message about the importance of science in our society​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!