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
DerKrebs [107]
3 years ago
5

Consider the roller coaster on the track. If you want to increase the kinetic energy of the roller coaster as it proceeds throug

h the course, what is the FIRST thing you should do?
A) Increase the height at point A.
B) Decrease the height at point A.
C) Increase the height at point B.
D) Decrease the height at point B.

Physics
1 answer:
a_sh-v [17]3 years ago
5 0

Answer:

The answer is A and D but if you want one anwer i think the anwer is A

Explanation:

You might be interested in
he tune-up specifications of a car call for the spark plugs to be tightened to a torque of 47 N⋅m . You plan to tighten the plug
S_A_V [24]

Answer:

207.4 N

Explanation:

The torque \tau  on a body is

\tau = r* F  where r is the radius vector from the point of rotation to the point at which force F is applied.

The product of r and F is equal to the product of magnitude of r and F multiplied by the sine of angle between both vectors.

Therefore, torque is also given by

\tau = rF\sin \theta

Where \theta is the angle between r and F.

Use the expression of torque.

Substitute L for r in the equation \tau = rF\sin \theta

\tau = LF\sin \theta

Where L is the length of the wrench.

Making F the subject

F = \frac{\tau }{{L\sin \theta }}

Force required to pull the wrench is given as,

F = \frac{\tau }{{L\sin \theta }}

Substitute 47{\rm{ N}} \cdot {\rm{m}}  for \tau, 25 cm for L, and 115o for \theta  

\begin{array}{c}\\F = \frac{{47{\rm{ N}} \cdot {\rm{m}}}}{{\left( {25{\rm{ cm}}} \right)\sin {{115}^{\rm{o}}}}}\left( {\frac{{1{\rm{ cm}}}}{{{{10}^{ - 2}}{\rm{ m}}}}} \right)\\\\ = 207.435{\rm{ N}}\\\\ \approx 207.4{\rm{ N}}\\\end{array}  

6 0
2 years ago
What is the speed of a car that traveled 500 meter in 30 seconds?
GenaCL600 [577]
<h2>Greetings!</h2>

To find speed, you need to remember the formula:

Speed = distance ÷ time

So plug the given values in:

500 ÷ 30 = 16.66

<h3>So the speed is 16.66m/s (metres per second)</h3>
<h2>Hope this helps!</h2>
3 0
3 years ago
Strip electrons from an atom and the atom becomes a
Dafna11 [192]
It becomes a positive Iron
7 0
3 years ago
Read 2 more answers
Which type of drug would be useful in dilating the pupils for an examination of the retina? Which type of drug would be useful i
givi [52]

Answer:

muscarinic receptor inhibitor

Explanation:

6 0
3 years ago
Read 2 more answers
4.
galina1969 [7]

Answer:

72%

Calculating Efficiency:

The amount of work obtained from a machine is always less than the amount of work put into it. Thisis because some of the work is lost due to friction. The efficiency of a machine can be calculated usingthe following formula:Percent Efficiency = (work output-Machine / work input-You) x 100%

8 0
2 years ago
Other questions:
  • A girl delivering newspapers covers her route by traveling 2.00 blocks west, 3.00 blocks north, and then 7.00 blocks east.
    9·1 answer
  • An elements atomic number is 61. How many protons would an atom of this element have?________ protons
    13·1 answer
  • What is the speed of sound at sea level?
    13·1 answer
  • What characteristic of waves is defined as the number of waves that pass a given point per unit time?
    5·1 answer
  • Arteriosclerotic plaques forming on the inner walls of arteries can decrease the effective cross-sectional area of an artery. Ev
    5·2 answers
  • A solenoid has a length , a radius , and turns. The solenoid has a net resistance . A circular loop with radius is placed around
    8·1 answer
  • A box is being dragged with a horizontal force of 65 N for 12 meters. If there is a force of friction acting on it
    12·1 answer
  • The heat vaporization for methyl alcohol is 1100 kj/kg. It is 2257 KJ/Kg for water. Thus means that______________.
    11·1 answer
  • Venus has a higher average surface temperature than mercury. why?
    11·1 answer
  • The average reaction time is 1.5 seconds?<br><br> True<br> False
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!