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
Minchanka [31]
4 years ago
13

Several forces act on a ball. Which of the following statements must be true? The velocity and acceleration could be in any dire

ction. None of these choices. The velocity and acceleration are in the direction of the resultant force. The velocity is in the direction of the resultant force, but the acceleration could be in any direction. The velocity could be in any direction, but the acceleration is in the direction of the resultant force.
Physics
1 answer:
mixer [17]4 years ago
5 0

Answer:

The velocity could be in any direction, but the acceleration is in the direction of the resultant force.

Explanation:

The ball (assuming that we can treat it as a point mass) must obey Newton's 2nd Law, that states that the acceleration produced by a force, is proportional to the applied force, being the mass the proportionality constant.

As the force is the vector, and the mass an scalar, the acceleration vector must be in the same direction as the force vector.

Velocity, instead, can be in any direction: When an object is speeding up is in the same direction as the acceleration, while if it is slowing down, it has just the opposite.

You might be interested in
What are the three most important types of units in radiobiology? Explain the meaning of each.
Rom4ik [11]

Answer:

Most adverse health effects of radiation exposure may be grouped in two general categories:

deterministic effects (harmful tissue reactions) due in large part to the killing/ malfunction of cells following high doses; and

stochastic effects, i.e., cancer and heritable effects involving either cancer development in exposed individuals owing to mutation of somatic cells or heritable disease in their offspring owing to mutation of reproductive (germ)

4 0
3 years ago
All known matter is made up of Question 1 options:
Tatiana [17]

the answer is (a) molecules

4 0
3 years ago
Read 2 more answers
Electrons are emitted from a surface when light of wavelength 500 nm is shone on the surface but electrons are not emitted for l
liberstina [14]

Explanation:

Given: \lambda = 500\:\text{nm} = 5×10^{-7}\:\text{m}

\nu = \dfrac{c}{\lambda} = \dfrac{3×10^8\:\text{m/s}}{5×10^{-7}\:\text{m}}

\:\:\:\:\:= 6×10^{14}\:\text{Hz}

The work function \phi is then

\phi = h\nu = (6.626×10^{-34}\:\text{J-s})(6×10^{14}\:\text{Hz})

\:\:\:\:\:\:\:= 3.98×10^{-19}\:\text{J}

3 0
2 years ago
Think about the electricity sent to your home from a power plant. How does the voltage of the electricity that leaves the plant
creativ13 [48]

Answer:

C) High voltage to low voltage

Explanation:

At a power plant, there is a production of electricity at a high voltage compared to the voltage provided to our home.

Voltage of about 12 KV is produced by power plant which is then converted into about 400 KV or greater (depending upon the countries) to transfer electricity from power plant to city Grid station using Step-up transformer. At City Grid station, Step-down transformer is used to convert high voltage (about 400 KV) to low voltage (about 13 KV) to transfer electricity from grid station to the city. Then this low voltage (about 13 KV) again converted to 220 V using Step-down transformer for household usage. So, overall  about 12 KV voltage at power plant is converted into 220 V for household usage using step-up and step-down transformer at different stages.

4 0
3 years ago
What is the same about a particle as gas, liquid, or solid?
Mademuasel [1]

Answer:

C

Explanation:

The chemical composition has particles like a gas liquid and solid

5 0
3 years ago
Read 2 more answers
Other questions:
  • In which phase of mitosis are chromosome first seen as a result of chromatin coiling?
    10·1 answer
  • Two coils that are separated by a distance equal to their radius and that carry equal currents such that their axial fields add
    8·1 answer
  • Please help me on calculating Net Force, examples E and D in the attachment. Would be grateful if you'd explain. Thank you.
    14·1 answer
  • A box is sliding down an incline tilted at a 11.1° angle above horizontal. The box is initially sliding down the incline at a sp
    11·1 answer
  • A stone is thrown vertically straight up with a velocity of 2800cm/s . By neglecting the air resistance , find the maximum heigh
    12·1 answer
  • A free falling object eventually stops on reaching the ground. What happens to its potential energy?
    10·1 answer
  • What are the two ways to determine the negative leg of an LED?
    15·1 answer
  • Calculate the mass of a planet that exerts a 1.5 X 10 13 N force on a 5.4 x 10
    14·2 answers
  • If you launch a projectile at an angle greater than 45 ° it’s horizontal range will not reach as far as if you had launched it a
    11·2 answers
  • What 3 dance styles make up musical theatre?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!