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
Hunter-Best [27]
3 years ago
10

 Why does a child in a wagon seem to fall backward when you give the wagon a sharp pull forward? 15. What force is needed to acc

elerate a sled ( (mass 55 kg) at 1.4 m/s2 on hortzsontal ricti a 63 N b. 71N C 77 N 101 N
Physics
1 answer:
slavikrds [6]3 years ago
3 0

Answer:

Force, F = 77 N

Explanation:

A child in a wagon seem to fall backward when you give the wagon a sharp pull forward. It is due to Newton's third law of motion. The forward pull on wagon is called action force and the backward force is called reaction force. These two forces are equal in magnitude but they acts in opposite direction.

We need to calculate the force is needed to accelerate a sled. It can be calculated using the formula as :

F = m × a

Where

m = mass = 55 kg

a = acceleration = 1.4 m/s²

F=55\ kg\times 1.4\ m/s^2

F = 77 N

So, the force needed to accelerate a sled is 77 N. Hence, this is the required solution.

You might be interested in
Consider two uniform solid spheres where both have the same diameter, but one has twice the mass of the other. how much larger i
egoroff_w [7]
<span>The moment of inertia of the large sphere will be twice that of the smaller sphere.
   The formula for the moment of inertia for a solid sphere is:
 I = (2/5)mr^2
 where
 I = moment of inertia
 m = mass
  r = radius

   Since both spheres have the same diameter, they also have the same radius, so the only change is their mass. And the moment of inertia is directly proportional to their mass as shown by the above formula. So the sphere with twice the mass will have twice the moment of inertia, or 2 times.</span>
5 0
3 years ago
Why is earth's temperature just right for life?
Rudik [331]
The answer is letter b
7 0
3 years ago
A stereo speaker produces a pure \"c\" tone, with a frequency of 262 hz. what is the period of the sound wave produced by the sp
jasenka [17]

Answer:

3.82 ms

Explanation:

The period of a wave is equal to the reciprocal of the frequency:

T=\frac{1}{f}

where f is the frequency.

In this problem, f = 262 Hz, so the period if this sound wave is

T=\frac{1}{262 Hz}=3.82\cdot 10^{-3} s=3.82ms

4 0
3 years ago
Simple but not plagiarized answer for "what is forces and motion?"​
egoroff_w [7]
FORCE-physical power or strength possessed by a living being:
He used all his force in opening the window.

MOTION-the action or process of moving or of changing place or position; movement.
7 0
2 years ago
A proton, an electron, and a helium nucleus all move at speed v. Rank their de Broglie wavelengths from largest to smallest. Wri
MatroZZZ [7]

Answer:

The correct option is 'c':electron,proton,helium nucleus

Explanation:

The De-Broglie's wavelength of particle is given by

\lambda =\frac{h}{mv}

Thus we can see that wavelength is inversely related to mass of the particle since 'h' (Plank's constant) and velocity is same for all the particles  

Thus we conclude that the the lightest particle will have the most wavelength

Electron being the lightest of the 3 particles will have the largest wavelength thus the correct option is 'c'. Since electron has the largest wavelength followed by proton and the least wavelength among the 3 is of helium.

6 0
3 years ago
Other questions:
  • Interactive LearningWare 10.1 reviews the concepts involved in this problem. A spring stretches by 0.0161 m when a 3.74-kg objec
    14·1 answer
  • This term ____ Location refers to using another location as a reference point, rather than using latitude and longitude.
    9·1 answer
  • A system releases 255 cal of heat to the surroundings while delivering 428 cal of work. what is the change in internal energy of
    13·1 answer
  • Indentify the 3 types of heat tranfer
    15·2 answers
  • If you have a positive electrical force, and a negative electrical force, what do you expect will happen?
    8·1 answer
  • what happens to the water after it rains? a. precipitation b. runoff c. condensation user: what do organisms from the ocean use
    6·1 answer
  • What is meant by the term illegal alien
    8·2 answers
  • Даю 60 ПОМОГИТЕ знайти опір кола зображеного на рисунку якщо кожний з опорів дорівнює 2 ом
    11·1 answer
  • Help with the number 2 question​
    12·1 answer
  • The atmosphere of Mercury and Mars are very thin. What effect does the thin atmosphere have on the temperature on the surface of
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!