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
stellarik [79]
3 years ago
12

A 48kg skateboarder is ready to drop

Physics
1 answer:
Naily [24]3 years ago
6 0

Hello, use the formula:

Pe = mgh

Data:

Pe = Potential energy = ¿?

m = Mass = 48 kg

g = Gravity = 9,81 m/s²

h = Height = 7 m

Replacing according our data:

Pe = 48 kg * 9,81 m/s² *  7 m

  • Resolving:

Pe =3296,16 J

The potential energy of the skateboarder is 3296,16 Joules

You might be interested in
An object that revolves around a planet is called a
ad-work [718]
A natural satellite. Or just a satellite.
6 0
3 years ago
Read 2 more answers
An Elevator of mass 200 kg travels upwards at constant velocity. What is the tension in the cables?
I am Lyosha [343]

The tension in the cables as the elevator travel upwards is 1,960 N.

The given parameters:

  • Mass of the elevator, m = 200 kg

<h3>Newton's second law of motion;</h3>

Newton's second law of motion states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.

The tension in the cables as the elevator travel upwards is calculated by applying Newton's second law of motion as shown below;

T = ma + mg

where;

  • a is the acceleration of the elevator
  • g is the acceleration due to gravity

At constant velocity, acceleration is zero (a = 0)

T = m(0) + mg

T = mg

T = 200 x 9.8

T= 1,960 N

Thus, the tension in the cables as the elevator travel upwards is 1,960 N.

Learn more about Newton's second law here: brainly.com/question/3999427

8 0
2 years ago
Why do u think you usually can't feel or notice the movement of the continents
luda_lava [24]
You can usaly not feal it because the earth is moving and the plates aren't having any major change to the movement.
7 0
4 years ago
A swimmer swims 3/5 the width of a river at one velocity, then swims the remainder of the river at half her initial velocity. Wh
SashulF [63]
Let her initial velocity be U.

Let the width of the river be W.

She swims 3/5 the width of the river  at  U.

Remainder width =  (1 - 3/5) = 2/5.

She then swims 2/5 the width with velocity  U/2.


Average Speed  =  (Total Distance Traveled)  /  ( Total Time Taken).


Distance =  Speed * time

time  =  Distance /  Speed.

Time in first trip:    =    (3/5)W / U =   0.6W/U.

Time in second trip  =  (2/5)W / (U/2)  =  0.4W / 0.5 U =  0.8W/U

Total Distance Traveled =  W,  width of the river.

Average Speed  =      W  /  (0.6W/U  +  0.8W/U) =    W /  (1.4W/U)

                             =  W  *  U / 1.4W 
                              =    U/1.4
                              =  U * 10 / 14
                              =  (5/7) U.

Therefore Average speed is  (5/7) of the initial speed.


3 0
3 years ago
Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an el
julia-pushkina [17]
The solution as per the attached photo.

4 0
4 years ago
Other questions:
  • A jeep-like vehicle has a canvas top that seals around all sides. When the jeep is at rest, the canvas roof is flat and level. I
    13·1 answer
  • List each layer of the earth, starting at the crust, and identify one characteristic of each layer.
    14·2 answers
  • How do scientific tests help determine the properties of substance?
    5·2 answers
  • A large ebony wood log, totally submerged, is rapidly floating down a flooded river. If the mass of the log is 165 kg, what is t
    9·1 answer
  • A car traveling at 23 m/s starts to decelerate steadily. It comes to a complete stop in 5 seconds. What is its acceleration?
    11·1 answer
  • Earth, whose in situ weight is 105 lb/cf and whose compacted weight is 122 lb/cf, is placed in a fill at the rate of 260 cy/hr,
    13·1 answer
  • A sound wave has a velocity of 350 meters/second and a frequency of 430 Hertz. What is it's wavelength?
    6·2 answers
  • How can plates move?<br> O A, apart<br> OB) together<br> OC) sideways<br> OD) in all these ways
    6·2 answers
  • 1. Two forces act on a box as follows: F1 = 100 N at 01 = 170° and F2 = 75 N
    7·1 answer
  • Which type of force is the weakest?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!