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
nasty-shy [4]
3 years ago
14

Question 18

Physics
1 answer:
Sedaia [141]3 years ago
3 0

Answer:

5.5 kg

Explanation:

The gravitational potential energy of an object is given by

U=mgh

where

m is its mass

g is the acceleration of gravity

h is the height of the object above the ground

For the rock in the problem, we know:

h = 12 m is the height above the ground

U = 650 J

g = 9.8 m/s^2

Therefore, we can solve the equation for m, the mass of the rock:

m=\frac{U}{gh}=\frac{650}{(9.8)(12)}=5.5 kg

You might be interested in
Which of the following is the same size as Pluto?
coldgirl [10]
I would say it's <span>C. the Moon
</span>
4 0
3 years ago
Read 2 more answers
What electric force would a stationary 3.8 C charge experience if it were far away from any other charges
MAVERICK [17]

Answer:

The electric force will be  0 N

Explanation:

From the question we are told that

   The magnitude of the charge is  q_1 = 3.8 \ C

   

Generally from Coulombs law the electric force  between two charges is mathematically represented as

         F = \frac{ k  *  q_1 q_2 }{r^2}

Here r is the distance of separation between that two charges.

  Now from the question we are told that the charge is far away from any other charge hence we can say that the distance between the charge and any other charge is  r = \infty

So

       F = \frac{ k  *  3.8  * q_2 }{\infty^2}

=>    F =0 \ N

Hence the electric force will be  0 N

3 0
2 years ago
Explain how a parachute works
Shtirlitz [24]
A parachute increases air friction, thus reducing falling speed.

Indeed, the air friction is roughly proportional to the surface of the object falling down; the parachute tremendously increases that surface.
4 0
3 years ago
Read 2 more answers
Ahmed kept a balloon from his birthday for several days until it began to deflate and slowly sink to the ground. He wondered how
goldfiish [28.3K]
<span>He should study the chapter about laws to get a better understanding about the laws that govern physical objects</span>
8 0
3 years ago
Read 2 more answers
The diagram shows a stone suspended under the surface of a liquid from a string. The stone experiences a pressure caused by the
Ivan
Where is the diagram? What is the question?
6 0
2 years ago
Other questions:
  • A medicine ball has a mass of 5 kg and is thrown with a speed of 2 m/s. what is its kinetic energy?
    8·1 answer
  • A child with mass 40 kg sits on the edge of a merry-go-round at a distance of 3.0 m from its axis of rotation. The merry-go-roun
    9·1 answer
  • Greg is in a bike race. At mile marker four (out of ten), his speed was measured at 13.5 mph.
    13·2 answers
  • Exercise 2.4.5: Suppose we add possible friction to Exercise 2.4.4. Further, suppose you do not know the spring constant, but yo
    10·1 answer
  • How is sound Important in different cultures
    5·1 answer
  • Cardiovascuar exercise involves
    12·1 answer
  • small plastic container, called the coolant reservoir, catches the radiator fluid that overflowswhen the automobile engine becom
    5·1 answer
  • Various radial points on a rotating Ferris wheel have: I. different linear velocities II. different angular velocities III. equa
    5·1 answer
  • Answer this question fast please i will mark you brainliest​
    6·2 answers
  • I’m not sure what this is… help please
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!