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
S_A_V [24]
3 years ago
6

A 100g block is initially compressing a spring 5.0 cm. The spring launches the block 50cm horizontally along the ground with a f

riction force of 15N. The block then slides up a frictionless ramp at 30 degrees reaching a 1.5m maximum height off the ground. What was the force constant of the spring
Physics
1 answer:
Setler [38]3 years ago
6 0

Answer:

7200 N/m

Explanation:

Metric unit conversion

100g = 0.1 kg

5 cm = 0.05 m

50 cm = 0.5 m

As the block is released from the spring and travelling to height h = 1.5m off the ground, the elastics energy is converted to work of friction force and the potential energy at 1.5 m off the ground

The work by friction force is the product of the force F = 15N itself and the distance s = 0.5 m

W_f = F_fs = 15*0.5 = 7.5 J

Let g = 10 m/s2. The change in potential energy can be calculated as the following:

E_p = mgh = 0.1*10*1.5 = 1.5 J

Therefore, as elastic energy is converted to potential energy and work of friction:

E_e = W_f + E_p

kx^2/2 = 7.5 + 1.5 = 9 J

k = 9*2/x^2 = 18/0.05^2 = 7200 N/m

You might be interested in
A 32-ounce stack of paper is at a temperature of 65°F. Then the paper is divided into fourths. The amount of thermal energy in e
Yakvenalex [24]
C because the stack of paper was divided into 4
8 0
3 years ago
1- A train travels 92 kilometers in 3 hours, and then 55 kilometers in 3 hours. What is its average speed?
Hunter-Best [27]
<h3>Answer:</h3>
  1. 24.5 km/h
  2. 4 17/27 m/s
  3. 11/3 m/s²
<h3>Explanation:</h3>

1. The average speed is the ratio of total distance to total time:

... speed = distance/time = (92 km +55 km)/(3 h +3h) = (147 km)/(6 h)

... = 24.5 km/h

2. speed = distance/time = (125 m)/(27 s) = 4 17/27 m/s

3. a = ∆v/∆t = (15 m/s -4 m/s)/(3 s) = 11/3 m/s²

8 0
3 years ago
Which of the following is not a symptom associated with hypertension
Romashka-Z-Leto [24]
Do you have any answer choices?

3 0
3 years ago
A piece of wood has mass of 250g and volume of 400cm cubed. what is its density​
Zigmanuir [339]

Answer:

0.625 \: g {cm}^{ - 3}

Explanation:

density \:  =  \frac{mass}{volume} \\  \\  =  \frac{250}{400}   \\  \\  = 0.625 \: g {cm}^{ - 3}

5 0
2 years ago
What about a moving object rarely stays the same?
Masja [62]
The speed as witch it is moving
8 0
3 years ago
Other questions:
  • What is the force on a box that is being pushed to the right with 50n of force while, at the same time, being pushed to the left
    11·1 answer
  • A small metal sphere has a mass of 0.14 g and a charge of -22.0 nc . it is 10 cm directly above an identical sphere with the sam
    7·1 answer
  • After the double-blind review policy was instituted, what percentage of published papers had a male first author?
    6·1 answer
  • A basketball has a mass of 601 g. Moving to the right and heading downward at an angle of 29 degree to the vertical, it hits the
    7·1 answer
  • How many protons, neutrons, and electrons does a neutral atom of this element have? (round atomic mass to nearest whole number)
    6·2 answers
  • According to the principle of superposition, when two waves meet l, they
    14·2 answers
  • A car has a kinetic energy of 4.32 x 10^5 J when traveling at a speed of 23 m/s.
    15·1 answer
  • Someone help me please.
    14·1 answer
  • The song Arirang is an example of korean F_L_ _O N_​
    14·1 answer
  • Which of the following terms describes a process for which Q = -73 J?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!