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
amid [387]
3 years ago
5

Brittany is changing the tire of her car on a steep hill 22.4 m high. She stumbles and drops the 10.5-kg spare tire, which rolls

down the hill, starting with an initial speed of 2.10 m/s.
What is the speed of the tire at the top of the next hill, which is 8.59 m high?
Physics
1 answer:
iragen [17]3 years ago
5 0
If we assume that there is no friction between the tire and the ground, we can the use formula:
ΔKE + ΔPE = 0
where KE is the kinetic energy which is equal to 0.5mv²
and PE is the potential energy which is equal to mgh

Substituting the given values:
0.5 (10.5) (v2 - 2.10^2) + 10.5 (9.81) (8.59 - 22.4) = 0

Solving for v:
v = 16.59 m/s
You might be interested in
Un móvil con velocidad inicial de 19,8km/h adquiere una aceleración constante de 2,4m/s^2. Determine la velocidad y el espacio r
nata0808 [166]

Responder:

Velocidad = 41.5m / s

Espacio recorrida = 352.5 metros

Explicación:

Dado lo siguiente:

Velocidad inicial (u) = 19.8 km / h

Aceleración (a) = 2.4m / s ^ 2

Tiempo de viaje (t) = 15 s

A.) velocidad después de 15 s

Velocidad inicial = (19.8 × 1000) m / 3600s Velocidad inicial = 19800m / 3600 = 5.5m / s

Usando la ecuación: v = u + at, donde v es la velocidad

v = 5.5 + 2.4 (15)

v = 5.5 + 36

v = 41.5m / s

Espacio recorrida:

v ^ 2 = u ^ 2 + 2aS; donde S es la distancia recorrida

41.5 ^ 2 = 5.5 ^ 2 + 2 × (2.4) × S

1722.25 = 30.25 + 4.8S

1722.25 - 30.25 = 4.8S

1692 = 4.8S S = 1692 / 4.8 S = 352.5m

8 0
3 years ago
What are 5 examples of pseudoscience that can be found on the Internet?
mel-nik [20]

-- flat Earth
-- no moon landings
-- no gravity
-- chem trails
-- astrology

7 0
3 years ago
What is photosynthesis​
Viktor [21]

Answer:

photosynthesis is the process by which plant prepares food using carbondioxide and water in the presence of sunlight

8 0
3 years ago
Read 2 more answers
B)
Vlad1618 [11]

Answer:

a) 16m/s b) 192m

Explanation:

v1=32m/s a=-2m/s^2 t=8s v2=? d=??

a) I will use this equation v2= v1 + a*t

v2= 32m/s + -2m/s^2 * 8s

v2= 32m/s + -16m/s

v2= 16m/s

b) v2^2=v1^2 + 2ad

rearranging

v2^2-v1^2=2ad

v2^2-v1^2/2= a d

v2^2-v1^2/2a=d

16m/s^2 - 32m/s^2/ 2 x-2m/s^2 =d

d=192m

5 0
3 years ago
is potential energy and kinetic energy real or is it theoretical and is used to explain how thing work? if it is real than where
vesna_86 [32]
It is is real because potential energy is stored inside gravitational energy.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Why poison frogs don't poison themselves? Are frogs dangerous ?
    7·1 answer
  • Which force requires contact?
    12·1 answer
  • What is the initial velocity of the object represented by
    9·2 answers
  • Which is the connection point between the retina and the brain?
    5·1 answer
  • Vx = 20 m/s , vy = 40 m/s . find the vector's direction. express your answer using two significant figures.
    15·2 answers
  • A place where two plates slip past each other, moving in opposite directions, is known as a
    10·2 answers
  • You have to deliver some 5.0-kg packages from your home to two locations. You drive for 2.0 h at 30 mi/h due east (call this seg
    6·1 answer
  • Two similar waves X and Y travel through the same medium. Wave X has a frequency of 200 hertz and a
    11·1 answer
  • The graph shows the amplitude of a passing wave over time in seconds (s). What is the approximate frequency of the wave shown?
    6·2 answers
  • The function of the __________is to store and supply fuel to the cylinder chamber where it can be mixed with air, vaporized, and
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!