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
Svetradugi [14.3K]
3 years ago
10

4. Tires on the road show how friction produces

Physics
2 answers:
MArishka [77]3 years ago
5 0

Answer:

Explanation:

Do you mean tire tracks?

If you do then the tracks show that there must have been a lot of heat involved. When the tires skid, the friction produced must be awfully hot to stop and 800 kg vehical (which is pretty small). The tire tracks that you see are bits of melted rubber taken from the tire.

Force is involved, but heat is the better answer.

gravity is necessary for friction to take place. If you were out in space, you could not get enough friction to leave tire tracks. (Force is awfully small).

Lubrication is there to give you a 4th choice. The exact opposite is what takes place. Lubrication reduces friction.

Nikolay [14]3 years ago
4 0

I think it is D. Force

You might be interested in
A pendulum of unknown mass is attached to the ceiling and nearly touches the floor as it completes 6 full cycles in 45 s. At its
lys-0071 [83]

Answer:

a) h = 14 m

b) h = 88 cm

c) f = 0.054 Hz

d) f = 0.13 Hz

Explanation:

a) T = 2π√(L/g)

L = T²g/4π²

L = (45/6)²(9.8) / 4π² = 13.963...

b) ½mv² = mgh

h = v²/2g

h = 4.15²/ (2(9.8)) = 0.87869

c) f = 1/T = 1 / (2π√(14 / 1.62)) = 0.0542

d) f = 6/45 = 0.13333...

6 0
3 years ago
A Boeing 737—a small, short-range jet with a mass of 51,000 kg— sits at rest at the start of a runway. The pilot turns the pair
lara31 [8.8K]

Answer:

67000N

Explanation:

We solve for the acceleration using the the 3rd constant-acceleration equation.

(Vx)f² = (Vx)i² + 2ax∆x

We have the displacement to be

∆x = Xf - Xi = 940m

Vx = 70m/s

The acceleration = (70m/s)²/2(940m)

= 4900/1880

= 2.61m/s²

From isaac newton's second law,

51000kg x 2.61m/s²

= 133,000N

The engines thrust is half of this value

Therefore thrust = 67000N or 67kN

8 0
3 years ago
The diagram below shows a portion of the rock cycle.
SCORPION-xisa [38]
Referring to the attached image below which represents the complete rock cycle, we will find that a marble can be formed when hot magma is cooled and crystallized.

Applying this to the given diagram, we will find that marble is most likely formed in position C

8 0
3 years ago
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.20×10^6 N, one at an angle 14.0∘ west of north,
laila [671]

Answer:

1.45544 J

Explanation:

See attachment

5 0
3 years ago
Find the speed at which Superman (mass=78.0 kg) must fly into a train (mass = 17863 kg) traveling at 75.0 km/hr to stop it. Runn
lapo4ka [179]

Answer with Explanation:

We are given that

Mass of superman=m=78 kg

Mass of train=m'=17863 kg

Speed of train=u'=75 km/h=75\times \frac{5}{18}=20.8 m/s

1 km/h=\frac{5}{18} m/s

Let initial speed of superman=u

Momentum=mv

Using the formula

78u=17863\times 75

u=\frac{17863\times 75}{78}

u=17175.9 km/h

Average horizontal force=0.58

Deceleration a=-0.58\times 9.8=-5.68 m/s^2

Final speed of train=v'=0

v=u+at

Using the formula

0=20.8-5.68t

5.68t=20.8

t=\frac{v'-u'}{a}=\frac{0-20.8}{-5.68}

t=3.66 s

v^2-u^2=2as

Using the formula

0-(20.8)^2=2(-5.68)a

(20.8)^2=2(5.68)s

s={\frac{(20.8)^2}{2(5.68)}=38.1 m

6 0
3 years ago
Read 2 more answers
Other questions:
  • What acceleration reaches a car of Formla 1 of 650 Kg of mass whose engine starts with a force of 6000 N
    8·1 answer
  • Calculate the acceleration if you push with a 20-N horizontal force against a 2-kg block on a horizontal friction- free air tabl
    5·1 answer
  • What other places in the world use hydro kinetic energy to generate electrical power?
    14·1 answer
  • A 73-kg boy is surfing and catches a wave which gives him an initial speed of 1.6 m/s. He then drops through a height of 1.60 m,
    12·1 answer
  • A ball is thrown into the air with an upward velocity of 32 feet per second. Its height, h, in feet after t
    8·2 answers
  • Energy of motion is known as what energy
    5·2 answers
  • Assuming no friction, how does the initial gravitational potential energy of
    13·1 answer
  • What happens to the average kinetic energy of a substance as its temperature increases?
    9·1 answer
  • If a hot air balloon is seen rising above the top of a hill, what is the top of the hill called? Question 2 options: delta point
    5·1 answer
  • A jar contains 100 marbles. There are 20 white marbles, 20 green marbles, 20
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!