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
Lisa [10]
4 years ago
9

Forţa de rezistenţă la înaintare pe care o întâmpină o maşină reprezintă o fracţiune f=0,15 din greutatea ei. Ce putere are moto

rul dacă masa autoturismului este 1,5t şi atinge viteza maximă de 144km/h?
Physics
1 answer:
frosja888 [35]4 years ago
5 0

Answer:

777.59N

Explanation:

(The forward strength of a car is a fraction f = 0.15 of its weight. What power does the engine have if the mass of the car is 1.5t and reaches a top speed of 144km / h?)

F = Mass * acceleration

Acceleration =change in velocity / time

F = Mv / t

F = 0.15mg

M = 1.5t

g = 9.8 m/s

V = 144 km/hr= (144 * 3600) / 1000 = 518.4 m/s

0.15mg = mv / t

0.15 * g = v/t

0.15 * 9.8 = 518.4 / t

1.47t = 518.4

t = 518.4 / 1.47 = 352.65s

But mass = 1.5t

Mass = 1.5 * 352.65 = 528.97kg

F = mv / t

F = (528.97 * 518.4) / 352.65

F = 777.59N

You might be interested in
You are camping with two friends, Joe and Karl. Since all three of you like your privacy, you don't pitch your tents close toget
aleksklad [387]

Answer:

35.7 m

Explanation:

Let

\mid A\mid=18.5 m

\mid B\mid=41 m

We have to find the distance between Joe's and Karl'e tent.

A_x=Acos\theta

A_y=Asin\theta

Substitute the values then we get

A_x=18.5cos23^{\circ}=17 m

A_y=18.5sin 23^{\circ}=7.2 m

B_x=41cos37.5^{\circ}=32.5 m

B_y=41sin37.5^{\circ}=-24.96 m

Because vertical component of B lie in IV quadrant and y-inIV quadrant is negative.

By triangle addition of vector

B=A+C

C=B-A

C_x=B_x-A_x=32.5-17=15.5 m

C_y=B_y-A_y=-24.96-7.2=-32.16\approx=-32.2 m

\mid C\mid=\sqrt{C^2_x+C^2_y}

\mid C\mid=\sqrt{(15.5)^2+(-32.2)^2}=35.7 m

Hence, the distance between Joe's and Karl's tent=35.7 m

6 0
3 years ago
A package of mass 5 kg sits on an airless asteroid of mass 7.6 × 1020 kg and radius 8.0 × 105 m. We want to launch the package i
Effectus [21]

Answer:

s =  1.7 m

Explanation:

from the question we are given the following:

Mass of package (m) = 5 kg

mass of the asteriod (M) = 7.6 x 10^{20} kg

radius = 8 x 10^5 m

velocity of package (v) = 170 m/s

spring constant (k) = 2.8 N/m

compression (s) = ?

Assuming that no non conservative force is acting on the system here, the initial and final energies of the system will be the same. Therefore  

• Ei = Ef

• Ei = energy in the spring + gravitational potential energy of the system

• Ei = \frac{1}{2}ks^{2} + \frac{GMm}{r}

• Ef = kinetic energy of the object

• Ef = \frac{1}{2}mv^{2}  

• \frac{1}{2}ks^{2} + (-\frac{GMm}{r}) = \frac{1}{2}mv^{2}  

• s = \sqrt{\frac{m}[k}(v^{2}+\frac{2GM}{r})}

s = \sqrt{\frac{5}[2.8 x 10^5}(170^{2}+\frac{2 x 6.67 x10^{-11} x 7.6 x 10^{20}}{8 x 10^5})}

s =  1.7 m

7 0
3 years ago
Alex swims at an average speed of 45m/min. how far does he swim in 1 min 24 sec?
saveliy_v [14]

Answer:

63 m

Explanation:

Average speed of swimming = 45 m/min

Time = 1 minute 24 seconds

Converting time into minutes:

Formula:

Putting values, we get.

Thus, Alex swims for 63 m in 1 minute and 24 seconds.

6 0
3 years ago
What is linear momemtum​
Genrish500 [490]

Answer:

Its momentum thats linear

Explanation:

from my secret analysis i would say this is really linear

7 0
3 years ago
Science questions!! Please help!!
kondor19780726 [428]

Answer:

1. b

2. c

3. b

4. a

5. a

6. c

7. c

8. d

7 0
3 years ago
Other questions:
  • If this atom has a balanced charged, how many protons would you expect to find in this atom?
    11·2 answers
  • Where does denitrification happen?
    8·1 answer
  • Two events are observed in a frame of reference S to occur at the same space point, with the second event occurring after a time
    14·1 answer
  • A poster is 0.95m high and 1.0m wide how many digits follow the decimal point when the perimeter of the poster is expressed with
    6·1 answer
  • When molecules collide, _________ energy is transferred from one molecule to the next.​
    13·1 answer
  • If a net force on the block is zero then what happens A.No forces act on the block.B There is no friction on the block.C The blo
    6·1 answer
  • A 600kg car is at rest, and then it accelerates to 5 m/s.
    5·1 answer
  • Research and write a short description (3-4 paragraphs) of one of the following parts of the electromagnetic spectrum. Your desc
    9·2 answers
  • Determine the limiting reactant of this 2Mg(s)+O2(g) 2MgO(s)​
    14·1 answer
  • In the equation y =cnat2 you wish to determine theinteger value (1,2 etc.) of the exponent n. the dimensions ofy, a, and t are k
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!