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
11111nata11111 [884]
3 years ago
9

outward from a wall just above floor level. A 1.5 kg box sliding across a frictionless floor hits the end of the spring and comp

resses it 6.5 cm before the spring expands and shoots the box back out. How fast was the box going when it hit the spring?
Physics
1 answer:
sweet [91]3 years ago
3 0

Answer:

v = 0.489 m/s

Explanation:

It is given that,

Mass of a box, m = 1.5 kg

The compression in the spring, x = 6.5 cm = 0.065 m

Let the spring constant of the spring is 85 N/m

We need to find the velocity of the box (v) when it hit the spring. It is based on the conservation of energy. The kinetic energy of spring before collision is equal to the spring energy after compression i.e.

\dfrac{1}{2}mv^2=\dfrac{1}{2}kx^2

v=\sqrt{\dfrac{kx^2}{m}} \\\\v=\sqrt{\dfrac{85\times (0.065)^2}{1.5}} \\\\v=0.489\ m/s

So, the speed of the box is 0.489 m/s.

You might be interested in
While trying out for the position of pitcher on your high school baseball team, you throw a fastball at 87.6 mi/h toward home pl
JulijaS [17]
The ball drops about 1 m.

8 0
3 years ago
A child in a boat throws a 5.10-kg package out horizontally with a speed of 10.0 m/s. the mass of the child is 27.6 kg and the m
lapo4ka [179]
I am totally lost with this sorry
7 0
3 years ago
****PLEASE HELP**** THERE ARE TWO QUESTIONS (ITS EASY)
notka56 [123]

but I think it's a and f

and

b and e

3 0
3 years ago
What is the maximum value of the magnetic field at a distance of 2.5 m from a light bulb that radiates 100 W of single-frequency
Anvisha [2.4K]

Answer:

1.04\times 10^{-7} T

Explanation:

IP  = Power of the bulb = 100 W

r  = distance from the bulb = 2.5 m

I = Intensity of light at the location

Intensity of the light at the location is given as

I = \frac{P}{4\pi r^{2}}

I = \frac{100}{4(3.14) (2.5)^{2}}

I = 1.28 W/m²

B_{o} = maximum magnetic field

Intensity is given as

I = \frac{B_{o}^{2}c}{2\mu _{o}}

1.28 = \frac{B_{o}^{2}(3\times 10^{8})}{2(12.56\times 10^{-7})}

B_{o} = 1.04\times 10^{-7} T

7 0
3 years ago
Explain the importance of measurement<br>Physics.<br><br>​
KiRa [710]

Answer:

Measurements are an important part of comparing things, as they provide the basis on comparing objects to other objects. Measurements allow us to recognize three hours and see how it's shorter than five hours, without having to observe the hours passing by themselves.

7 0
3 years ago
Other questions:
  • Cathode-ray tubes produce images on the principle of induced emf. true or false?
    5·1 answer
  • If a bird applies a 5 N upward force on a branch to lift the branch of ground to a
    11·1 answer
  • While a utility patent protects the way an invention is used and​ works, a​ ___ patent protects the way it looks?
    8·1 answer
  • Each of the boxes starts at rest and is then pulled for 2.0 m across a level, frictionless floor by a rope with the noted force.
    13·1 answer
  • What is the equivalent resistance of a series circuit with the following resistors: 10 ohms, 35 ohms, and 150 ohms?
    7·2 answers
  • A Carnot heat engine and an irreversible heat engine both operate between the same high temperature and low temperature reservoi
    15·1 answer
  • A car of mass 750 kg has an initial speed of 75 mph. Traveling in a straight line, its speed is increased uniformly to 120 mph i
    5·1 answer
  • Aperson walk along actual path of radias 5m/s in 10 second what is the acceleration​
    5·1 answer
  • Using your strategy to overcome your obstacle.
    15·2 answers
  • Give a few examples/ applications of the universal law of gravitation​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!