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
OLga [1]
3 years ago
5

I NEED A QUESTION ON THE CONSERVATION OF MECHANICAL ENERGY AND THE ANSWER PLEASE

Physics
1 answer:
zavuch27 [327]3 years ago
3 0

Answer:

See Below

Explanation:

Question:

A 200 g dart is pressed against the spring of a toy dart gun. The spring (with spring constant k = 500 N/s) is compressed by 6.0 cm and released. If the dart detaches from the spring when the spring reaches its equilibrium length (x = 0), what is the launch speed of the dart?

Answer:

PE = KE

1/2kx^2 = 1/2mv^2

Sole for v:

v = sqrt(kx^2/m)

v = sqrt(500*(0.06)^2/0.200)

v = sqrt(1.8/0.200

v = sqrt(9)

v = 3 m/s

I really hoped this helped you. :) Sorry if it didn't.

You might be interested in
A quantum system has three energy levels, so three wavelengths appear in its emission spectrum. the shortest observed wavelength
daser333 [38]
The wavelength emitted is indirectly proportional to the difference in the change in the energy level. For the wavelength 278 nm the change in energy level is significantly high. Further change in energy level is indicated by 454nm light but the difference in energy level for this wavelength to be emitted  is not greater than the previous one. There is a possibility that these subsystems have now very low energy which should result in wavelengths ranging from 700 to 900 nm. There is another possibility that there is some metastable subsystems in the system which may cause LASER emission.
3 0
3 years ago
Starting from rest, a racing car has a displacement of 201 m, S, in the first 5.0 s of uniform acceleration. What is the car's a
mihalych1998 [28]

Answer:

Explanation:

s = ½at²

a = 2s/t²

a = 2(201) / 5.0²

a = 16.08

a = 16 m/s²

8 0
2 years ago
Which device uses a rotating electric power source to produce a magnetic field?
faltersainse [42]

Answer:

A. a motor

Explanation:

A motor is an electrical device or machine that converts electrical energy into mechanical energy. That is, a motor takes electrical energy to produce motion. There are different types of motors such as DC motor, induction motor and so on.

When electrical current flows through a coil, a magnetic flux is been produced, therefore when a rotating power source is supplied to coil of a motor, a magnetic field is produced which causes torque.

3 0
3 years ago
A 100 N force is applied to a box at an angle of 60° to the
Anarel [89]

Answer: lift force = 100sin60 = 86.6 N

             pull force = 100sin60 = 50.0 N

Explanation:

8 0
3 years ago
At present most of the world's energy needs are supplied by what kind of energy
antiseptic1488 [7]

Fossil fuels . . . coal, oil, natural gas

Among primitive cultures, wood is an important source.
4 0
3 years ago
Other questions:
  • A 9.0 volt battery is connected to four resistors in a parallel circuit. The resistors have 7.0 Ω, 5.0 Ω, 4.0 Ω, and 2.0 Ω respe
    9·2 answers
  • HURRY PLS WILL RATE AND THANKS AND BRAINLIEST
    12·1 answer
  • How people change their thinking and behaviors is central to which
    9·1 answer
  • HELP ASAP PLEASE!!! A car starting from rest, accelerates constantly at 8m/s2 for 6s. How far did it travel during this time per
    13·2 answers
  • The point during heat transfer at which both materials or objects are the same temperature.
    11·1 answer
  • A block of ice is sliding down a ramp of slope 45° to the horizontal. At the bottom of the ramp, the block strikes a wall with a
    10·1 answer
  • If the delay of the 10-bit adder is 1ns, the setup time, the hold time, and the propagation delay of the registers is 0.3 ns, 0.
    7·1 answer
  • 3.
    8·1 answer
  • The less mass an object has, the --- its gravitational f
    11·1 answer
  • Greyhounds are among the fastest dogs on earth. On average, what is the fastest speed they can run?.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!