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
Lera25 [3.4K]
3 years ago
15

Could I please get some help on this question I don’t understand .

Physics
1 answer:
Oksana_A [137]3 years ago
5 0

Answer:

12.5 m/s

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 0 m/s

Height (h) = 8 m

Final velocity (v) at 8 m above the lowest point =?

NOTE: Acceleration due to gravity (g) = 9.8 m/s²

The velocity of the roller coaster at 8 m above the lowest point can be obtained as follow:

v² = u² + 2gh

v² = 0² + (2 × 9.8 × 8)

v² = 0 + 156.8

v² = 156.8

Take the square root of both side

v = √156.8

v = 12.5 m/s

Therefore, the velocity of the roller coaster at 8 m above the lowest point is 12.5 m/s.

You might be interested in
You can tell if something’s a living thing or not by checking if it has?
olga_2 [115]

Explanation:

To determine whether something is living or nonliving, a living thing must meet seven specific characteristics: feeding, movement, respiration, excretion, growth, sensitivity, and reproduction. A living organism needs to be able to feed to make energy and grow.

Please allow me to know if I helped with a thank you, rating or brainly.

Miss Hawaii

Download pdf
5 0
2 years ago
If the voltage across a circuit element of constant resistance is doubled, how is the current through the circuit element affect
Karo-lina-s [1.5K]

Answer:

The current through the circuit element will also be doubled.

Explanation:

The relationship between voltage and current of a circuit element is given by Ohm's Law. According to Ohm's Law:

Voltage = (Resistance)(Current)

If the resistance of the element is kept constant, the relation between Voltage and Current through that element becomes as follows:

Voltage = (Constant)(Current)

Voltage α Current

Thus, the voltage is directly proportional to the current for constant value of the resistance.

Therefore, when the voltage across a circuit element of constant resistance is doubled, <u>the current through the circuit element will also be doubled.</u>

5 0
3 years ago
Two capillary tubes, made of the same substance, are lowered into a water bath. The radius of the larger tube is twice that of t
Alinara [238K]

Answer: 4.4 cm.

Explanation:

Rise of water in the smaller tube= h1=8.8 centimeter(cm)

Radius of the smaller tube= r

Rise of water in the larger tube= h2 (in centimeter).

The radius of the larger tube is twice that of the smaller tube means that;

The radius in the larger tube is 2r ( 2 multiply by the radius r, of the smaller tube)

Using Jurin's law;

height or rise of liquid is inversely proportional to its radius, r.

That is; hr= constant.

Therefore, we have;

h1 × r1 = h2 × r2.

Rise in smaller tube × radius of the smaller tube = height of the larger tube × radius of the larger tube.

8.8 cm × r = h2 × 2r

= (8.8cm)r = (h2) 2r

Divide both sides by 2r, we then have;

8.8cm r/ 2r = h2

h2= 4.4cm

Therefore, the height or rise in large tube is half of that of the smaller tube.

8 0
3 years ago
In a racquetball game, your opponent repeatedly hits the same type of serve off the front wall and it lands in approximately the
Kaylis [27]

Answer:

b

Explanation:

6 0
2 years ago
Read 2 more answers
Why is it important to keep the muzzle of a firearm pointed in a safe direction, even though the firearm's safety is engaged?
Gnom [1K]
The correct answer is B. The safety only prevents you from pulling the trigger, but does not stop the pin from striking the primer. For example, if you drop the firearm, the pin may hit the primer and fire the firearm. It is always responsible to keep the firearm pointed in a safe direction so that if this happens, no consequences come out of it.
6 0
3 years ago
Other questions:
  • The heavyweight boxing champion of the world punches a sheet of paper in midair, bringing it from rest up to a speed of 26.5 m/s
    9·1 answer
  • What is the mechanical advantage of a hockey stick that is gripped at point D and hits the puck at point A?
    7·2 answers
  • A chair is at rest on the floor. The chair absorbs thermal energy from the floor, and begins moving spontaneously with kinetic e
    12·1 answer
  • What are the products of the light reactions that are subsequently used by the calvin cycle?
    15·1 answer
  • Identify three pollutants released into the air when fossil fuels are burned.
    9·2 answers
  • Bolt starts the race not moving, but then increased his speed until he reaches a top speed. Once Bolt reaches his top speed he m
    13·1 answer
  • I WILL GIVE YOU BRAINLIEST! PLEASE HELP
    15·1 answer
  • Define potential difference as used in electricity​
    9·2 answers
  • Two plane waves of the same frequency and with vibrations in the z-direction are given by c (y, t) = (2 cm) cos a p 4 cm y - 20
    8·1 answer
  • At the very end of 500 DAYS OF SUMMER, Tom (Joseph Gordon-Levitt) is so heartbroken by
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!