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
Kitty [74]
3 years ago
6

A child and sled with a combined mass of 50.0 kg slide down a frictionless slope. if the sled starts from rest and has a speed o

f 4.00 m/s at the bottom, what is the height of the hill? m
Physics
2 answers:
hoa [83]3 years ago
8 0

Answer:

The height of the hill is 0.81 m

Explanation:

It is given that,

Mass of child and sled, m = 50 kg

The sled starts from rest and has a speed of v = 4 m/s

We have to find the height of the hill. It can be calculated using conservation of energy. The potential energy at the bottom of hill is 0 and at maximum height the kinetic energy is 0.

So, \dfrac{1}{2}mv^2=mgh

h=\dfrac{v^2}{2g}

h=\dfrac{(4\ m/s)^2}{2\times 9.8\ m/s^2}

h = 0.81 m

So, the height of the hill is 0.81 m. Hence, this is the required solution.                                        

Furkat [3]3 years ago
4 0
            <span> Using conservation of energy

Potential Energy (Before) = Kinetic Energy (After)

mgh = 0.5mv^2

divide both sides by m

gh = 0.5v^2

h = (0.5V^2)/g

h = (0.5*2.2^2)/9.81

h = 0.25m

</span>
You might be interested in
What kind of object are the light rays interacting with in the model below?
Ymorist [56]

Answer:

Concave lens

.............

5 0
2 years ago
4. What is the instantaneous acceleration at t= 10 s?
vodka [1.7K]

Answer:

I am fairly certain the answer is 2m/s^2

Explanation:

6 0
3 years ago
Which of these devices does NOT contain a magnet or electromagnet?
Black_prince [1.1K]
I think it is D a light bulb
7 0
3 years ago
Read 2 more answers
Keisha analyzes this circuit diagram.
Mazyrski [523]
Component ' W ' is the standard schematic symbol for a switch.

The short line between the two circles can be shown straight,
like it is now, when the switch is 'closed' and current can flow.

Or, it can also be drawn slightly tilted, so it's not touching one
of the circles.  In that case, the switch is 'open', no current can
flow through it, and the whole circuit is shut down.
9 0
3 years ago
Read 2 more answers
An open-end mercury manometer is connected to a low-pressure pipeline that supplies a gas to a laboratory. Because paint was spi
almond37 [142]

Answer:

A. Using

Pgauge= Pmanometer

And we know that

Pgauge= deta(hpg)

So deta h = Pgauge/density x g

So

= 7.5(6894.76/1psig)/ 13.6*10^3*9.8m/s²)

= 387.9mm

So to find height of pipe connected to the pipe we say

= h -deta h

= 900-387.97mm

=512.02mm

B. We use manometry principle

Pgas+density xg(25*10^3)-PX density{h-(H-0.25)=0

So

Finally Pgas= 6.54psig

3 0
3 years ago
Other questions:
  • The relationship between a cathode and an anode involves
    9·2 answers
  • An object of mass m = 4.0 kg, starting from rest, slides down an inclined plane of length l = 3.0 m. The plane is inclined by an
    14·1 answer
  • 4.7 cm. The tube is sealed at one end and loaded with lead shot to give it a total mass of M = 130 g. The tube floats in water (
    5·1 answer
  • What’s a star? In complete sentences.
    8·1 answer
  • a ball is rolled uphill a distance of 3 meters before it slows,stops,and begins to roll back. the ball rolls downhill 6 meters b
    13·1 answer
  • Which of the following is the best definition of an isotope?
    7·2 answers
  • A key lime pie in a 10.00 in diameter plate is placed upon a rotating tray. Then, the tray is rotated such that the rim of the p
    12·1 answer
  • There is a parallel plate capacitor. Both plates are 4x2 cm and are 10 cm apart. The top plate has surface charge density of 10C
    15·1 answer
  • Two beams of coherent light are shining on the same piece of white paper. with respect to the crests and troughs of such waves,
    10·1 answer
  • Which word describes Arette?<br> A. Trilingual<br> B. Bilingual<br> C. Monolingual
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!