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
Anastasy [175]
3 years ago
8

A block with mass m 2.00 kg is placed against a spring on a frictionless incline with angle 30 degrees (Fig. B-43). (The block i

s not attached to the spring.) The spring, with spring constant k 19.6 N/cm, is compressed 20 cm and then released. (a) What is the elastic potential energy of the compressed spring? (b) What is the change in the gravitational potential energy of the block - Earth system as the block moves from the release point to its highest point on the incline? (c) How far along the incline is the highest point from the release point?
Physics
1 answer:
guajiro [1.7K]3 years ago
7 0

Answer:

Explanation:

a )

The stored elastic energy of compressed spring

= 1 / 2 k X²

= .5 x 19.6 x (.20)²

= .392 J

b ) The stored potential energy will be converted into gravitational potential energy of the block earth system when the block will ascend along the incline . So change in the gravitational potential energy will be same as stored elastic potential energy of the spring that is .392 J .

c ) Let h be the distance along the incline which the block ascends.

vertical height attained ( H ) =h sin30

= .5 h

elastic potential energy = gravitational energy

.392 = mg H

.392 = 2 x 9.8 x .5 h

h = .04 m

4 cm .

=

You might be interested in
A girl pushes on a table with a 5-newton force directed to the east. Her friend pushes on the same table with a 10- newton force
nalin [4]

Think like this: 10 is twice as much as 5.

Answer A pushes 2 squares east and 4 squares sout, being doubled just as 10 is to 5. Happy to help :)

4 0
3 years ago
Read 2 more answers
A ramp is used to load furniture onto a moving truck. The person does 1240 J of work pushing
Len [333]

Answer:

The efficiency of the ramp is, Eff = 6.63 %

Explanation:

Given,

The work done by the person pushing the furniture up the ramp is, W₁ = 1240 J

The work done by the ramp is, W₀ = 822 J

The efficiency of the ramp is given by the formula,

                                 <em> Eff = ( W₀ / W₁ ) x 100%</em>

                                        = ( 822 / 12400 ) x 100%

                                        = 6.63 %

Hence, the efficiency of the ramp is, Eff = 6.63 %

6 0
3 years ago
Which statement about the atomic nucleus is correct? a. The nucleus is made of protons and neutrons and has a negative charge. b
Anon25 [30]
"b. The nucleus is made of protons and neutrons and has a positive charge" is the only option that is true about the atomic nucleus. The protons give it a positive charge.
5 0
3 years ago
Kepler's 3rd law: harmonic law
Amanda [17]
<span>orbital velocities to their mean distances from the Sun.</span>
7 0
3 years ago
Which statements define factors that contribute to the decline of Roman Empire
USPshnik [31]
The Huns' invasion of Europe caused a mass migration driving Germanic tribes of Northern Europe to the borders of the Roman Empire which led to the Barbarian attacks on Rome. 
7 0
3 years ago
Other questions:
  • Which statement describes one feature of a closed circuit? Charges do not flow. Bulbs will not shine. The circuit is broken. The
    13·2 answers
  • ______ is the average _____ energy of the molecules in a object
    11·1 answer
  • There is a simple pattern for determining if a binary number is odd. what is it and why does this pattern occur
    12·2 answers
  • Ryan wants to identify an element. Which piece of information would best help Ryan identify the element?
    14·2 answers
  • Which of the following is not a benefit of improved cardio-respiratory fitness?
    7·1 answer
  • What is the process in which the work of scientists is evaluated by other researchers? a. Scientific critique c. scientific inqu
    7·2 answers
  • Ehren is trying to increase his mile run from eight to six minutes. He has decided to run some sandy hills near his home. Which
    9·1 answer
  • Which of the following is a primary source?
    13·1 answer
  • On what factors do pressure depend ​
    9·1 answer
  • What would happen if you went through a black hole. I will give brainliest for a correct answer.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!