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
klasskru [66]
3 years ago
11

A block of mass 2.95 kg is placed against a horizontal spring of constant k = 820 N/m and pushed so the spring compresses by 0.0

800 m. (a) What is the spring potential energy of the block-spring system? 2.624 Correct: Your answer is correct. J (b) If the block is now released and the surface is frictionless, calculate the block's speed after leaving the spring.
Physics
1 answer:
ad-work [718]3 years ago
7 0

Answer:

(a) 2.624

(b) 1.334

Explanation:

The given data in the question is:

Mass = 2.95 kg

Spring constant "k" = 820 N/m

Compression of Spring "x" = 0.0800m

Using this data and the equation to find the answer for spring potential energy:

spring potential energy = 1/2 kx²

= 1/2 (820 N/m)(0.0800m)²

= 2.624 Joules

(b) - It is given that the surface is friction-less which means no loss of energy during the motion of spring. This means that all the potential energy possessed by the spring converts to Kinetic Energy of the block. We can equate spring potential energy with Kinetic energy to find the block's speed as below:

Kinetic Energy = 1/2mv² where "m" is mass and "v" is velocity of the object

1/2mv² =  spring potential energy (found in part "a" above)

1/2(2.95 kg)v² = 2.624 Joules

v² = (2.624 x 2) / 2.95

v² = 1.779

v = √1.779

v = 1.334 m/s

You might be interested in
The shape of the earth is an _______ ________
Nastasia [14]
The shape of the earth is an <span>oblate spheroid.</span>
3 0
3 years ago
Two point charges each carrying a charge of + 4.5 E - 6 C are located 4.5 meters away from each other. How strong is the electro
BARSIC [14]

Answer:

0.009 N, repulsive

Explanation:

The electrostatic force between two electric charges is given by:

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

where

k is the Coulomb's constant

q1 and q2 are the two charges

r is the separation between the two charges

In this problem, we have

q_1 =q_2 = +4.5\cdot 10^{-6}C are the two charges

r = 4.5 m is their separation

Substituting into the equation, we find

F=(9\cdot 10^9 Nm^2 C^{-2})\frac{(+4.5\cdot 10^{-6} C)(4.5\cdot 10^{-6} C)}{(4.5 m)^2}=0.009 N

Moreover, the force is repulsive. In fact, the following rules apply:

- When two charges have same sign, they repel each other

- When two charges have opposite signs, they attract each other

7 0
3 years ago
A hockey puck wont slide very far on concrete or asphalt, but it will slide for a very long time on ice. Why is this?
Ilya [14]
When hockey players push the puck along the ice it slides causing heat which melts the ice causing the friction against the ice to be less.
7 0
3 years ago
Read 2 more answers
A race car traveling at 10 meters per second accelerates at 1.5 meters per second squared while moving a distance of 600 meters.
Mekhanik [1.2K]

Answer:

Explanation:

Givens

vi = 10 m/s

a = 1.5 m/s^2

d = 600 m

vf = ?

Formula

vf^2 = vi^2 + 2*a*d

Solution

vf^2 = 10^2 + 2*1.5 * 600

vf^2 = 100 + 1800

vf^2 = 1900

sqrt(vf^2) = sqrt(1900)

vf = 43.59 m/s

7 0
3 years ago
What would be the answer for this and how?
Veronika [31]

Answer:

B. 6 cm

Explanation:

First, we calculate the spring constant of a single spring:

k = \frac{F}{\Delta x}\\

where,

k = spring constant of single spring = ?

F = Force Applied = 10 N

Δx = extension = 4 cm = 0.04 m

Therefore,

k = \frac{10\ N}{0.04\ m}\\k =  250\ N/m\\

Now, the equivalent resistance of two springs connected in parallel, as shown in the diagram, will be:

k_{eq} = k + k\\k_{eq} = 2k = 2(250\ N/m)\\k_{eq} = 500\ N/m\\

For a load of 30 N, applying Hooke's Law:

\Delta x = \frac{F}{k_{eq}}\\\\\Delta x = \frac{30\ N}{500\ N/m}\\\\\Delta x = 0.06\ m = 6\ cm\\

Hence, the correct option is:

<u>B. 6 cm</u>

7 0
3 years ago
Other questions:
  • A 12-inch object is placed 30 inches in front of a plane mirror. A ray of light from the object strikes the mirror at a 45-degre
    5·2 answers
  • On the interstate, the speed limit is 60 mi/h (about 100 km/h) a skilled driver can safely decelerate at about 6.1m/s^2. How lon
    13·1 answer
  • If you put positive energy and negative energy into a spiral tube like a corkscrew with a barrier so they could not meet, so the
    6·1 answer
  • An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 95 kPa and 27°C, and 75
    9·1 answer
  • What is robot??????????
    13·1 answer
  • 10. Ron’s father finally installed cruise control on their flying car. He was having trouble because he kept of forgetting that
    10·1 answer
  • How do smaller summer ice flores affect polar bears physically?
    7·1 answer
  • What is the only medium (not provided) that light would travel through even faster than air?
    7·2 answers
  • The primary gas in a volcano is: carbon dioxide, sulfur dioxide, water vapor, nitrogen.
    8·2 answers
  • a girl standing on her heel exert more pressure on the ground than an elephant standing flat on its feet. Give reasons​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!