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
djyliett [7]
3 years ago
10

The total mechanical energy of a system is equally divided between kinetic energy and potential energy. can never be negative. i

s constant only if conservative forces act. is either all kinetic energy or all potential energy, at any one instant. is constant only if nonconservative forces act. A skier, of mass 60. kg, pushes off the top of a frictionless hill with an initial speed of 4.0 m/s. How fast will she be moving after dropping 10. m in elevation? 15. m/s 0.15 km/s 0.20 km/s 49. m/s 10. m/s In an inelastic collision, the final total momentum is less than the initial momentum. the same as the initial momentum. insufficient information to answer more than the initial momentum. A handball of mass 0.10 kg, traveling horizontally at 25. m/s, strikes a wall and rebounds at 19. m/s. What is the change in the momentum of the ball? 1.2 N-s 72 N-s 5.4 N-S 1.8N-s 4.4 N-s Car A (mass = 1000 kg) moves to the right along a level, straight road at a speed of 6.0 m/s. It collides directly with car B (mass = 200 kg) in a completely inelastic collision. What is the momentum after the collision if car B was initially at rest? 10. KN-s to the right zero 6.0 KN-s to the right 8.0 KN-s to the left 2.0 KN-s to the right
Physics
1 answer:
inn [45]3 years ago
8 0

Answer:

1-  is constant only if conservative forces act

2- 60*9.8*10+0.5*60*4^2=0.5*60*v^2

v=14.56=15 m/s

3- B (Momentum is conserved)

4- Change in momentum= m(v-u) = 0.10(19--25)=4.4 Ns

5- 1000*6+0 = 6000 KN Momentum before to the right, So final momentum should also be same.

Explanation:

5 questions are in 1 question all of them are answered.

You might be interested in
Pentru a scoate apă dintr‑o fântână, Ionel folosește dispozitivul reprezentat în figura 3, în care d = 20 cm și ℓ = 40 cm. Gălea
icang [17]

Answer:

no comprendo

Explanation:

6 0
3 years ago
I have my exam monday I need some help!
Lana71 [14]

Answer:

Explanation:

If the passage of the waves is one crest every 2.5 seconds, then that is the frequency of the wave, f.

The distance between the 2 crests (or troughs) is the wavelength, λ.

We want the velocity of this wave. The equation that relates these 3 things is

f=\frac{v}{\lambda} and filling in:

2.5=\frac{v}{2.0} so

v = 2.5(2.0) and

v = 5.0 m/s

7 0
3 years ago
What is the answer to this question?
solmaris [256]

Answer:

<em><u>NA2SO3</u></em> is the reactant in the reaction

Explanation:

The substances which take part in a chemical reaction are called <em><u>reactants</u></em>

<em>HOPE </em><em>IT </em><em>HELPS </em>

<em>HAVE </em><em>A </em><em>NICE </em><em>DAY </em><em>:</em><em>)</em>

<em>XxYourBabyGirlxX2</em>

8 0
2 years ago
How are the Earth's crust and jigsaw alike?
Neporo4naja [7]
The earth's surface is composed tectonic plates of basaltic oceanic crust with lighter granitic continental crust floating in isostatic balance on the oceanic crust.<span>
</span>
4 0
3 years ago
Read 2 more answers
A particle is moving with velocity v(t) = t2 _ 9t + 18 with distance, s measured in meters, left or right of zero, and t measure
Alex787 [66]
V = t^2 - 9t + 18

position, s
s = t^3 /3 - 4.5t^2 +18t + C

       t = 0, s = 1 => 1=C => s = t^3/3 -4.5t^2 + 18t + 1

Average velocity: distance / time

   distance: t = 8 => s = 8^3 / 3 - 4.5 (8)^2 + 18(8) + 1 = 27.67 m
   Average velocity = 27.67 / 8 = 3.46 m/s

t = 5 s

     v = t^2 - 9t + 18 = 5^2 - 9(5) + 18 = -2 m/s
     speed = |-2| m/s = 2 m/s
 
Moving right
     V > 0 => t^2 - 9t + 18 > 0
     (t - 6)(t - 3) > 0

     => t > 6 and t > 3 => t > 6 s => Interval (6,8)

    => t < 6 and t <3 => t <3 s => interval (0,3)

    

Going faster and slowing dowm

acceleration, a = v' = 2t - 9
     a > 0 => 2t - 9 > 0 => 2t > 9 => t > 4.5 s
     Then, going faster in the interval (4.5 , 8) and slowing down in (0, 4.5)
     


4 0
3 years ago
Other questions:
  • The temperature of 4.29 mol of an ideal diatomic gas is increased by 27.1 ˚C without the pressure of the gas changing. The molec
    5·1 answer
  • The attractive electrostatic force between the point charges 6.14×10−6 c and q has a magnitude of 0.845 n when the separation be
    11·1 answer
  • What is the equivalent resistance between points A and B?
    6·1 answer
  • Create a piece of evidence showing the relationship between potential and kinetic energy You MUST include the following words: p
    7·1 answer
  • 15. The Energy possessed by a body by virtue<br>of its position or state is called :​
    11·1 answer
  • A 40.0-$kg$ body is moving in the direction of the positive x axis with a speed of 238 $m/s$ when, owing to an internal explosio
    10·1 answer
  • what is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour PLEASE HELP WILL MARK BRAINLIEST
    7·1 answer
  • A circuit in which two or more paths are connected to the voltage source
    5·1 answer
  • Water is considered to be
    5·1 answer
  • 1. If all four switches below are turned on, which light bulb will light up? (W is wood, S is silver, and Yis yarn.)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!