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
Arturiano [62]
3 years ago
10

A 40.0 kg box is placed on a 2.00 m tall shelf. If the box falls off the shelf, what is its kinetic energy as it strikes the gro

und?
Physics
1 answer:
RUDIKE [14]3 years ago
6 0
M = 40 Kg , g=9.8 m/s² , h = 2 m

PE = m g h

PE = (40) (9.8) (2)

PE = 784 J

KE = PE

½m v² = m g h

½ v² = g h

½ v² = (9.8) (2)

½ v² = 19.6

v² = 19.6×2

v² = 39.2

V = √39.2

V = 6.26 m/s

KE = ½mv²

KE = ½(40) (6.26)²

KE =783.8 J
You might be interested in
Jupiter is 317 times more massive than the Earth. Its gravitational attraction is _____ Earth's.
NeTakaya
That all depends on your distance from the center of each planet.

On the surface of Jupiter, the acceleration of gravity is 2.53 times
its value on the surface of the Earth.
6 0
3 years ago
Read 2 more answers
Which of the following lists arranges the colors of light from highest energy to lowest energy?
Afina-wow [57]
So, for the visible range, the colors are arranged in order of increasing frequency like this: Red < Orange<span> < </span>Yellow<span> < Green < Blue < Indigo < </span>VIolet<span>.</span>
3 0
3 years ago
A student is measuring the volumes of nectar produced by a flowering plant for an experiment. He measures nectar from 50 flowers
pantera1 [17]

The question is incomplete, the complete question is;

A student is measuring the volumes of nectar produced by a flowering plant for an experiment. He measures nectar from 50 flowers using a graduated cylinder that measures to the nearest millilitre (mL). Which statement describes a change that can help improve the results of his experiment?

A.) His measurements will be more precise if he takes measurements from an additional 100 flowers. B.) His measurements will be more accurate if he uses a graduated cylinder that measures to the nearest tenth of a mL. C.) His measurements will be more precise if he uses a graduated cylinder that measures to the nearest tenth of a mL. D.) His measurements will be more accurate if he takes measurements from an additional 100 flowers.

Answer:

His measurements will be more accurate if he uses a graduated cylinder that measures to the nearest tenth of a mL.

Explanation:

In the measurements of volume using most graduated cylinders, the cylinders are calibrated to the nearest tenth owing to the uncertainty in the measurement of volume.

Hence if a cylinder has measures to the nearest milliliter(mL), then he can improve his experiment by using a graduated cylinder that measures to the nearest tenth of a mL

6 0
3 years ago
A wagon wheel consists of 8 spokes of uniform diamter, each of mass m, and length L. The outer ring has a mass m rin. What is th
Genrish500 [490]

Answer:

L^2(\dfrac{8m}{3}+m_r)

Explanation:

m = Mass of each rod

L = Length of rod = Radius of ring

m_r = Mass of ring

Moment of inertia of a spoke

\dfrac{mL^2}{3}

For 8 spokes

8\dfrac{mL^2}{3}

Moment of inertia of ring

m_rL^2

Total moment of inertia

8\dfrac{mL^2}{3}+m_rL^2\\\Rightarrow L^2(\dfrac{8m}{3}+m_r)

The moment of inertia of the wheel through an axis through the center and perpendicular to the plane of the ring is L^2(\dfrac{8m}{3}+m_r).

3 0
3 years ago
A car on a straight road starts from rest and accelerates at 1.0 meter per second? for 10. seconds.
Marysya12 [62]

Answer:

11 or 10 meters a second

Explanation:

pretty sure thats my explanation "pretty sure" like my confidence? mark me brainliest bad at spelling lol

7 0
2 years ago
Other questions:
  • For the first nutcracker, two applied forces of magnitude f were required to crack the nut, whereas for the second, only one app
    14·1 answer
  • If a player has more mass they will also have more_____
    11·1 answer
  • In 1932, James Chadwick bombarded beryllium-9 with alpha particles. One product was a neutron. This led to the direct experiment
    8·1 answer
  • What's the difference between anxiety and depression
    12·2 answers
  • The question is on the attached image<br> Help please :(
    9·1 answer
  • One end of a 13-foot-long ladder is resting on the top of a vertical wall. The distance from the foot of the ladder to the base
    10·1 answer
  • of these layers of the atmosphere, has the greatest air pressure A. mesosphere B. stratosphere C. exosphere D. troposphere
    10·2 answers
  • What is Planck’s law?
    15·1 answer
  • Which of the following machines most likely has the greatest efficiency?
    12·1 answer
  • How much work is required to move an electron
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!