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
san4es73 [151]
3 years ago
5

If an object has a kinetic energy of 30 j and mass of 34kg how fast is the object moving ?

Physics
1 answer:
cricket20 [7]3 years ago
3 0

Ek = (m*V^2) / 2 where m is mass and V is speed, then we can take this equation and manipulate it a little to isolate the speed.

Ek = mv^2 / 2 — multiply both sides by 2

2Ek = mv^2 — divide both sides by m

2Ek / m = V^2 — switch sides

V^2 = 2Ek / m — plug in values

V^2 = 2*30J / 34kg

V^2 = 60J/34kg

V^2 = 1.76 m/s — sqrt of both sides

V = sqrt(1.76)

V = 1.32m/s (roughly)

You might be interested in
A car moves to the right as shown. In order for the car to slow down, the acceleration must
Zolol [24]

Answer:An object that moves rightward (i.e., rightward velocity) and accelerating leftwards must be slowing down. And so as you trace your eye from left to right across the diagram (rightward), the dots should be spaced closer and closer together to indicate that the object is slowing down.

Explanation:

4 0
3 years ago
Read 2 more answers
A police car moving at 36.0 m/s is chasing a speeding motorist traveling at 30.0 m/s. The police car has a siren that emits soun
maxonik [38]

Answer:

The frequency heard by the motorist is 4313.2 Hz.

Explanation:

let f1 be the frequency emited by the police car and f2 be the frequency heard by the motorist, let v1 be the speed of the police car and v2 be the speed of the motorist and v = 343 m/s be the speed of sound.

because the police car is moving towards the motorist at a higher speed, then the motorist will hear a increasing frequency and according to Dopper effect, that frequency is given by:

f1 =  [(v + v2/(v - v1))]×(f2)

   = [( 343 + 30)/(343 - 36)]×(3550)

   = 4313.2 Hz

Therefore, the frequency heard by the motorist is 4313.2 Hz.

5 0
3 years ago
The amount of water vapor in the air is known as the _______.
storchak [24]
It is C the humidity
5 0
3 years ago
Read 2 more answers
As an object accelerates to a speed close to the speed of light, which of the following stays the same?
kirill115 [55]
A. Speed of light (Apex) 
6 0
3 years ago
Read 2 more answers
Why do we tend to attribute others' negative behaviors to dispositions over situational factors?
miskamm [114]

Answer:

Because you have a greater understanding of the mentality and conduct of individuals you care about, you are better able to understand their perspective and are more likely to recognize possible situational factors for their behavior.

4 0
2 years ago
Other questions:
  • An aluminum sheet is compressed to a thickness of 2.0 microns. If each cubic centimeter of aluminum has a mass of 2.70 g, what i
    13·1 answer
  • What conditions must be met if a man-made satellite is to attain a circular orbit around the earth?(choose as many as apply)
    15·1 answer
  • A generator's maximum output is 220 V. What is the rms potential difference?
    15·1 answer
  • Your 64-cm-diameter car tire is rotating at 3.5 rev/s when suddenly you press down hard on the accelerator. After traveling 200
    6·1 answer
  • why is the meteor crater in arizona still visible when most impact craters created by meteorites hitting earth are not
    8·2 answers
  • A girl is sitting in a sled sliding horizontally along some snow (there is friction present).
    8·1 answer
  • Power describes the
    5·2 answers
  • This is my last assignment plz help
    6·2 answers
  • Suppose a piano tuner stretches a steel piano wire 7.5 mm. The wire was originally 0.975 mm in diameter, 1.45 m long, and has a
    15·1 answer
  • An ion is an atom that has
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!