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
Montano1993 [528]
3 years ago
9

What is the energy of a rock with a mass of 10.2 kg on a cliff that is 300 m height?

Physics
1 answer:
Anuta_ua [19.1K]3 years ago
4 0

The potential energy of the rock is 30,000 J

Explanation:

The mechanical energy of an object is equal to the sum of its gravitational potential energy (PE) and its kinetic energy (KE):

E=PE+KE

where

PE is the gravitational potential energy, which is the energy possessed by the object due to its position in the gravitational field

KE is the kinetic energy, which is the energy possessed by the object due to its motion

In this problem, the rock is at rest, so its kinetic energy is zero:

KE = 0

Therefore, the energy of the rock is just equal to its potential energy, which is:

E=PE=mgh

where

m = 10.2 kg is the mass of the rock

g=9.8 m/s^2 is the acceleration of gravity

h = 300 m is the height of the rock above the ground

Substituting and solving, we find

PE=(10.2)(9.8)(300)=30,000 J

Learn more about potential energy:

brainly.com/question/1198647

brainly.com/question/10770261

#LearnwithBrainly

You might be interested in
Qual a capacidade térmica de um objeto que, ao receber 10000 cal de energia, tem sua temperatura elevada de 25°C para 75°C?
Stolb23 [73]

Answer:

200 cal/^{\circ}C

Explanation:

When heat energy is supplied to an object, the temperature of the object increases according to the equation:

Q=C\Delta T

where

Q is the heat supplied

C is the heat capacity of the object

\Delta T is the change in temperature

In this problem we have:

Q=10,000 cal is the energy supplied

\Delta T=75C-25C=50C is the change in temperature of the object

Therefore, the heat capacity of the object is:

C=\frac{Q}{\Delta T}=\frac{10,000}{50}=200 cal/^{\circ}C

6 0
3 years ago
Sound waves with frequency higher that 20,000 Hz are referred to as
Solnce55 [7]
<span>Sound waves with frequency higher that 20,000 Hz are referred to as "Ultrasonic"

Hope this helps!</span>
4 0
3 years ago
What is the area of the bottom of a tank 30.0 cm long and 15.0 cm wide?​
Igoryamba

Answer:

perimeter of the bottom of the tank is 450 cm

Explanation:

If you want to get area you need the Length, width,and height.

5 0
3 years ago
Read 2 more answers
Starting circuit One battery. 2 light bulbs in parallel; switch What is the voltage across the battery? What is the voltage acro
balu736 [363]

Answer:

The voltage across light bulb 1 and light bulb 2 is the the same i.e V

Explanation:

In a parallel circuit, the Voltage is same across all the components of the circuit and the current flowing through each component is added to get the total current across the circuit.

Let us say, the voltage across the circuit is V. The voltage across light bulb 1 and light bulb 2 is the the same i.e V

5 0
3 years ago
What is the chief benefit of anaerobic exercise?
ra1l [238]

Answer:

c isthe answer if not see my profile m e. e. t me I will explain u

8 0
2 years ago
Other questions:
  • Which is true about inelastic collisions: a. An inelastic collision does not obey conservation of energy. b. An inelastic collis
    8·1 answer
  • A wave with a greater amplitude will transfer . . . . \
    5·1 answer
  • 1. applied research
    12·1 answer
  • When drawing up liquid into a micropipette, put the tip in the liquid at a Choose... degree angle, push the plunger to the Choos
    5·1 answer
  • A biophysics experiment uses a very sensitive magnetic field probe to determine the current associated with a nerve impulse trav
    15·1 answer
  • An object weighs 15N in air and 13N when completely
    10·1 answer
  • Objects accelerate because
    12·1 answer
  • Name three characteristics of sound​
    10·1 answer
  • the (speed) of an object is a vector quantity that tells us the speed and direction of an objects momentum is this correct? If n
    10·2 answers
  • Two metal plates 4 cm long are held horizontally 3 cm apart in a vacuum, one being vertically above other. The upper plate is at
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!