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
Kobotan [32]
3 years ago
14

What is center of mass?

Physics
1 answer:
yuradex [85]3 years ago
3 0
“a point representing the mean position of the matter in a body or system.”
You might be interested in
A ball with an initial velocity of 8.00 m/s rolls up a hill without slipping. (a) Treating the ball as a spherical shell, calcul
GrogVix [38]

Answer:

Part i)

h = 5.44 m

Part ii)

h = 3.16 m

Explanation:

Part i)

Since the ball is rolling so its total kinetic energy in this case will convert into gravitational potential energy

So we have

\frac{1}{2}mv^2 + \frac{1}{2}I\omega^2 = mgh

here we know that for spherical shell and pure rolling conditions

v = R \omega

I = \frac{2}{3}mR^2

\frac{1}{2}mv^2 + \frac{1}{2}(\frac{2}{3}mR^2)(\frac{v^2}{R^2}) = mgh

\frac{5}{6}mv^2 = mgh

h = \frac{5v^2}{6g}

h = \frac{5(8^2)}{6(9.81)} = 5.44 m

Part b)

If ball is not rolling and just sliding over the hill then in that case

\frac{1}{2}mv^2 = mgh

h = \frac{v^2}{2g}

h = \frac{8^2}{2(9.81)} = 3.16 m

3 0
3 years ago
Afootball of mass 550g is at rest on the ground the football is kicked with a force of 108 newton the footballers boot is in con
d1i1m1o1n [39]

If "0.3 minute" is correct, then it's 9,543,272 Joules.

If it's supposed to say "0.3 SECOND", then the KE is 2,651 Joules.

6 0
3 years ago
Two wires are made of the same material and have the same length but different radii. They are joined end-to- end and a potentia
Radda [10]

Answer:

Current

I think The choose (B)

B. Electric current

6 0
3 years ago
When reaching a boundary between two media (1 and 2), an incident ray is partially reflected and partially refracted. The ray is
lukranit [14]

Answer:

The angle of incidence when the reflected ray is perpendicular to the incident ray = 45°

Explanation:

According to Snell's Law,

n₁ sin θ₁ = n₂ sin θ₂

When the angle between the incident ray and reflected ray is 90°, the angle of incidence is θ₁ and the angle of reflection, θ₂ = 90° - θ₁ and the index of refraction in the Snell's Law for both media would be the same, n₁ = n₂ = n

n sin θ₁ = n sin (90° - θ₁)

Note that from trigonometric relations,

Sin (90° - θ₁) = cos θ₁

n sin θ₁ = n cos θ₁

(sin θ₁)/(cos θ₁) = 1

tan θ₁ = 1

θ₁ = arctan 1 = 45°

Hope this Helps!!!

7 0
3 years ago
Read 2 more answers
The contact force that acts on objects in a liquid or gas and allows objects to float is called
Harrizon [31]
<span>The contact force that acts on objects in a liquid or gas and allows objects to float is called    </span>Buoyancy.
8 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the final temperature of a mixture of 0.350 kg of ice initially at 218°C and 237 g of water initially at 100.0°C.
    6·1 answer
  • What is the kinetic energy of an object moving 40m/s with a mass of 20kg?
    7·1 answer
  • Which snack is an excellent choice for protein, B vitamins, vitamin E, and healthful fat
    6·2 answers
  • 6. If a car went a distance of 225 kilometers in 4
    7·1 answer
  • A group of particles of total mass 35 kg has a total kinetic energy of 313 J. The kinetic energy relative to the center of mass
    7·1 answer
  • A student measured the mass of ice in a glass container with a tight lid. He allowed the ice to melt, and then found the mass of
    12·1 answer
  • Two rods of mass m, length L are stuck together to form an X shape and spun around the center. What is the rotational inertia
    11·1 answer
  • HELP PLEASE TY!
    15·2 answers
  • What current is required in the windings of a long solenoid that has 1580 turns uniformly distributed over a length of 0.44 m in
    14·1 answer
  • A simulation shows whether changing various weather conditions increases
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!