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
OlgaM077 [116]
2 years ago
5

A runner of mass 80 kg is moving at 8.0 m/s. Calculate her kinetic energy. ​

Physics
1 answer:
lana [24]2 years ago
7 0

Answer:

2560J

Explanation:

By definition the kinetic energy can be calculated in the following way:

K = (mv²)/2 = 80kg·(8.0m/s)²/2 = 2560 J

You might be interested in
This is for physics, i need help fast!!
jarptica [38.1K]
Speed = distance / time
S= 40 000m / 5400s
S= 7.41m/s
7 0
3 years ago
Light of wavelength 600 nm passes though two slits separated by 0.22mm and is observed on a screen 1.1m behind the slits. The lo
Ne4ueva [31]

Answer:

y(m=1)=\frac{(1)(600*10^{-9}m)(1.1m)}{0.22m}=3*10^{-6}m\\\\y(m=1)=\frac{(-1)(600*10^{-9}m)(1.1m)}{0.22m}=-3*10^{-6}m

Explanation:

We have to take into account the expression for the position of the fringes

dsen\theta=m\lambda\\y=\frac{m\lambda D}{d}

where m is the number of the maximum, d is the separation of the slits, D is the distance to the screen.

(a) By replacing we obtain

y(m=1)=\frac{(1)(600*10^{-9}m)(1.1m)}{0.22m}=3*10^{-6}m\\\\y(m=1)=\frac{(-1)(600*10^{-9}m)(1.1m)}{0.22m}=-3*10^{-6}m

(b)  more information is required to solve this point. Please complete the information.

HOPE THIS HELPS!

4 0
3 years ago
Read 2 more answers
Match the following:​
labwork [276]

Answer:

  1. iron metal :chromium
  2. machinery part :nickel or chromium
  3. ornamentation and decoration pieces :silver and gold
  4. processed food :tin coated iron can
  5. bridges and automobiles :zinc metal
  6. distilled water:bad conductor
7 0
3 years ago
A disc of mass m slides with negligible friction along a flat surface with a velocity v. The disc strikes a wall head-on and bou
qwelly [4]

Answer:

-v/2

Explanation:

Given that:

  • a disc of mass m
  • Collides with the wall going through a sliding motion on on the plane smooth surface.
  • Upon rebounding from the wall its kinetic energy becomes one-fourth of the initial kinetic energy before collision.

<u>We know, kinetic energy is given as:</u>

KE_i=\frac{1}{2}. m.v^2

consider this to be the initial kinetic energy of the body.

<u>Now after collision:</u>

KE_f=\frac{1}{4}\times KE_i

KE_f=\frac{1}{4} \times \frac{1}{2}\times m.v^2

Considering that the mass of the body remains constant before and after collision.

KE_f=\frac{1}{2}\times m.(\frac{v}{2})^2

Therefore the velocity of the body after collision will become half of the initial velocity but its direction is also reversed which can be denoted by a negative sign.

3 0
3 years ago
The acceleration due to gravity on Jupiter is greater than that on Earth. On Jupiter, a person will weigh ______.
soldier1979 [14.2K]
A person will weigh more

5 0
3 years ago
Read 2 more answers
Other questions:
  • A brick with a mass of 20 kg and a weight of 196 N is released on a frictionless plane at an angle of 30°. What is the accelerat
    15·1 answer
  • What kind of energy does a rubber band have when it is stretched?
    15·2 answers
  • The activation temperature of most ice-forming nuclei is ______ 0 oc.
    11·1 answer
  • The total pressure for a fluid is a. the sum of the hydrostatic and static pressures. b. the sum of the hydrostatic and dynamic
    8·1 answer
  • Which planet's gravitational pull is closest to that of Earth?
    7·1 answer
  • What is night vision pls explain in long answer you can copy from google
    10·1 answer
  • A mover loads a crate onto a truck bed 1.6m from the street using a ramp that is 4.6m long. What is a mechanical advantage?
    10·1 answer
  • The wind blows a leaf at 37.9 m/s for 118 s left. How are does the leaf go in that period of time.
    14·1 answer
  • Only 2 questions plz answer.
    6·2 answers
  • Atoms and molecules in matter are always_______
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!