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
kap26 [50]
3 years ago
11

Two books with different masses fall off the same bookshelf. As they fall,which has more kinetic energy and why

Physics
1 answer:
Alex3 years ago
5 0
Kinetic energy E = m * v^2 

<span>Since the acceleration of both books will be -neglecting air resistance - the same, the kinetic energy will be directly proportional to the mass of the book.</span>
You might be interested in
How long will it take to travel 200 km traveling 100m/s?
Damm [24]
Convert: 1km = 1000 m 200000 m * 0.01 s/m = 2000 s or 33 minutes and 20 seconds.
7 0
3 years ago
What is the minimum force require to move a 5kg wooden crate on a wooden floor?
kolbaska11 [484]

You need to know the coefficient of static friction between a wooden object and a wooden surface. I'll denote it with <em>µ</em>. If you're given a specific value you should obviously use that.

By Newton's second law, the horizontal and vertical net forces are

• net horizontal:

∑ <em>F</em> = <em>p</em> - <em>f</em> = 0

• net vertical:

∑ <em>F</em> = <em>n</em> - <em>w</em> = 0

where

<em>p</em> = magnitude of the <u>p</u>ushing force

<em>f</em> = mag. of <u>f</u>riction

<em>n</em> = mag. of the <u>n</u>ormal force

<em>w</em> = <u>w</u>eight of the crate

The second equation gives

<em>n</em> = <em>w</em> = (5 kg) (9.8 m/s²) = 49 N

Friction is proportional to the normal force by a factor of <em>µ</em>, so

<em>f</em> = <em>µ</em> (49 N) = 49<em>µ</em> N

To overcome static friction, the push has to exceed this in magnitude, so that

<em>p</em> > 49<em>µ</em> N

For instance, if <em>p</em> = 0.25, then <em>p</em> would need to greater than 12.25 N. (This example isn't particularly helpful, though, since both possibly correct options are larger than 12.25 N...)

7 0
3 years ago
If a stereo has a dial that changes the volume of sounds the stereo makes what is the dial doing
vredina [299]
The volume dial is acting as a voltage divider or a variable resistor. 
4 0
3 years ago
Read 2 more answers
I NEED a LOT of help PLEASE!
Minchanka [31]
Infrared, visible light, then ultraviolet. Infrared is light that the human eye can not see and visible light is clearly light we can see then ultraviolet is has such a high frequency we can't see it either.
3 0
3 years ago
Read 2 more answers
Fifteen identical particles have various speeds: one has a speed of 2.00 m/s, two have speeds of 3.00 m/s, three have speeds 5.0
Tems11 [23]
A. Average speed is weighted mean (1 × 2 + 2 × 3 + 3 × 5 + 4 × 7 + 3 × 9 + 2 × 12.5)/15 = (2 + 6 + 15 + 28 + 27 + 25)/15 = 103/15 = 6.867 b. RMS is square root of 1/15 times sum of squares of speeds Sum of squares is 4 + 9 + 9 + 25 + 25 + 25 + 49 + 49 + 49 + 49 + 81 + 81 + 81 +156.25 + 156.25 = 848.5 
c. RMS speed = √(848.5/15) = 7.521 
Most likely the speed is the peak in the speed distribution, which is 7.
5 0
3 years ago
Other questions:
  • What is instantaneous speed
    10·1 answer
  • Jefferson's administration was the beginning of popular government in the United States.
    13·1 answer
  • How does the ability to balance a chemical equation relate to that reaction obeying the Law of Conservation of Matter?
    15·1 answer
  • explain how a convection current is set up in water. The explanation has been started for you: When the heating element is switc
    5·2 answers
  • (20%) problem 1: suppose we want to calculate the moment of inertia of a 62.5 kg skater, relative to a vertical axis through the
    11·1 answer
  • What’s the net force of an object being throwing into the air
    7·1 answer
  • As part of their research on cell reproduction, Ms. Kelly's biology class designed various experiments to determine the best con
    15·1 answer
  • You must always include a direction when recording an amount of energy. Is this true?
    13·2 answers
  • A 17 kg box experiences an applied force of +175 N and a force of friction of -125 N. While experiencing these unbalanced forces
    15·1 answer
  • Belle is walking south at an average velocity of 6 km/h. How many kilometers can she walk in three hours?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!