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
Sati [7]
3 years ago
13

(Please please please help!) A 38kg child is at the top of a slide that is 2.1m tall.

Physics
1 answer:
Alja [10]3 years ago
7 0

Answer:

A). Since No friction is present...

All Gravitational potential Energy is converted to Kinetic

Using g=10ms-²

1/2mv²=mgh

1/2v²=gh

v²=2gh

v=√2gh

v√2(10)(2.1)

v=6.48ms-¹

B). 250J is lost....

The Energy on the Body =Total Energy – Lost Energy

Mgh - 250

380(10)(2.1) - 250

=548J

548J is the energy that would be transferred into speeding up the Child... The 250 is lost to other factors

PE Energy=1/2mv²

v²= 2PE/m

v=√2 x 548/(38)

v=√28.84

v=5.37ms-¹

You might be interested in
Does the coefficient of kinetic friction depend on speed?
kolbaska11 [484]
It depends on speed because it is a part of a car
3 0
3 years ago
_____ contains chemical energy.<br> A. Heat<br> B. Light<br> C. Natural gas
FinnZ [79.3K]

The answer is C. Natural gas because both A and B are their own forms of energy.

5 0
3 years ago
Read 2 more answers
Help asap physics homework, i'll give brainliest
Bess [88]

Answer:bippity boppity yee

Explanation:

5 0
4 years ago
Read 2 more answers
the mass of one water drop is 0.0008kg and the gravitational field strength is 10N/kg what is its weight
djyliett [7]
Weight = (mass) x (gravity)

Weight = (8 x 10⁻⁴ kg) x (10 N/kg) = 0.008 Newton
8 0
3 years ago
A 20-liter container contains 2.0 moles of oxygen at a pressure of 92 kpa. the average kinetic energy of translation of oxygen m
Vikentia [17]

From ideal gas law, PV=nRT

where P is the pressure, V is the volume of the container, n is number of moles, R is the gas constant and T is the temperature.

Hence, T=\frac{PV}{nR}=\frac{92*10^{3}*2.0*10^{-3}}{2*3.314}

T= 110.65 k

Kinetic Energy = \frac{3}{2}KT=\frac{3}{2}  (1.38*10^{-23})(110.65)

K.E=  2.2*10^{-21}J

<h3>What is a kinetic energy? </h3>

The energy an object has as a result of motion is known as kinetic energy.

A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force. After the work is finished, energy is transferred to the item, which then moves at a new, constant speed. Kinetic energy is the type of energy that is transferred and is dependent on the mass and speed attained.

Kinetic energy can be converted into other types of energy and transported between objects. A flying squirrel may run into a chipmunk that is standing still, for instance. Some of the squirrel's initial kinetic energy may have been transferred to the chipmunk or changed into another kind of energy after the collision.

To know more about kinetic energy, visit:

brainly.com/question/22174271

#SPJ4

4 0
2 years ago
Other questions:
  • Give a physical description of radio waves and compare and contrast it with the frequency, wavelength, energy and wave speed wit
    6·1 answer
  • If a forces of 40 newtons moves a cart a distance of 9 meters, the work done is?
    5·1 answer
  • Explain how you could find out whether of not an unknown liquid is water
    11·2 answers
  • A fixed end rectangular cantilever beam is subjected to 40 kg load at its end. The beam is 80 mm high, 20 mm wide and 0.5 m long
    11·1 answer
  • The gear motor can develop to 1/2 hp when it turns at 300 rev/min. If the shaft has a diameter of 1/2 in. determine the maximum
    11·1 answer
  • An initially stationary object experiences an acceleration of 6 m/s2 for a time of 15 s. How far will it travel during that time
    11·1 answer
  • A cruise ship with a mass of 1.03 ✕ 107 kg strikes a pier at a speed of 0.652 m/s. It comes to rest after traveling 4.44 m, dama
    7·1 answer
  • Consider n equal positively charged particles each of magnitude Q/n placed symmetrically around a circle of radius a. Calculate
    8·1 answer
  • The forces of gravity between the earth and the moon causes
    10·1 answer
  • What steps should be taken to increase the amount of current produce a generator​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!