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
IgorLugansk [536]
2 years ago
5

A crate is given a push across a horizontal surface. The crate has a mass m, the push gives it an initial speed of 1.90 m/s, and

the coefficient of kinetic friction between the crate and the surface is 0.120.
(a) Use energy considerations to find the distance (in m) the crate moves before it stops.

(b) Determine the stopping distance (in m) for the crate if its initial speed is doubled to 3.80 m/s.
Physics
1 answer:
Roman55 [17]2 years ago
3 0

Answer:

a) s = 1.534\,m, b) s = 6.135\,m

Explanation:

a) The energy equation for the crate is modelled after the Principle of Energy Conservation and Work-Energy Theorem. Changes in gravitational potential energy can be neglected due to the information of a horizontal surface:

K_{A} = W_{loss}

\frac{1}{2}\cdot m \cdot v^{2} = \mu_{k} \cdot m \cdot g\cdot s

The distance that crate needs to cover before stopping is:

s = \frac{v^{2}}{2\cdot \mu_{k}\cdot g}

s = \frac{(1.90\,\frac{m}{s} )^{2}}{2\cdot (0.120)\cdot (9.807\,\frac{m}{s^{2}} )}

s = 1.534\,m

b) The stopping distance is:

s = \frac{(3.80\,\frac{m}{s} )^{2}}{2\cdot (0.120)\cdot (9.807\,\frac{m}{s^{2}} )}

s = 6.135\,m

You might be interested in
Does altitude has an effect on weight? PLEASE HELP!​
Studentka2010 [4]

Answer:

Yes

Explanation:

The farther something is from the center of mass of an object such as a planet, the lower the gravitational force between them

F = GMm/d²

4 0
2 years ago
What two factors determine the density of a fluid?
tekilochka [14]

Answer:

Mass and volume.

Explanation:

The equation for density is always mass divided by volume. To determine the density of a fluid, you would need to find its volume and its mass.

6 0
3 years ago
Solve the equation x=3logy2 for y.
melisa1 [442]

X = 3 · log(Y²)

X = 3 · 2·log(Y)

X/6 = log(Y)

10^(X/6) = 10^log(Y)

Y = 10^(X/6)

6 0
2 years ago
Read 2 more answers
PLEASEEEEEE HELP
emmainna [20.7K]

Answer:

8.89 m/s² west

Explanation:

Assume east is +x.  Given:

v₀ = 120 m/s

v = 0 m/s

t = 13.5 s

Find: a

v = at + v₀

0 m/s = a (13.5 s) + 120 m/s

a = -8.89 m/s²

a = 8.89 m/s² west

8 0
2 years ago
An object is placed 4.0 cm to the left of a convex lens with a focal length of +8.0 cm . Where is the image of the object?
Serjik [45]

The image of the object is 8cm to the left of the lens (D)

<h3></h3>

What is the image of an object?

The image of an object is said to be the location where light rays from that object intersect with a mirror by reflection.

It is calculated thus:

1÷v = 1÷f - 1÷u

<h3>How to calculate the image of an object</h3>

From the formula

1÷v = 1÷f - 1÷u

<h3>Where </h3>

V = image distance fromthe object

U = object

f = focal length

Substitute the values

1÷v = 1÷8 - 1÷ 4

1÷v = - 1÷8

Make v the subject of formula

v = -8cm

Therefore, the image of the object is 8cm to the left of the lens (D)

Learn more on focal length here:

brainly.com/question/25779311

#SPJ1

6 0
2 years ago
Other questions:
  • zeros are always considered significant digits when they are to the left of the decimal point True or False
    11·2 answers
  • Is the following sentence true or false? Two atoms of the same element can have different numbers of protons.
    14·1 answer
  • Virginia���s blue ridge mountains were pushed up when the north american and african continents collided in a process known as
    15·2 answers
  • In a semiclassical model of the hydrogen atom, the electron orbits the proton at a distance of 0.053 nm. Part A What is the elec
    12·1 answer
  • Which of the following examples best describe using an inclined plane
    6·1 answer
  • When is the next total solar eclipse in illinois
    14·1 answer
  • Which term describes the difference in electrical charge across a membrane?
    12·1 answer
  • In a scientific experiment, the_
    5·2 answers
  • Compare the freezing point of water in the aquanaut’s apartment to its value at the surface. Is it higher, lower, or the same?
    5·1 answer
  • What happens to the speed of the electrons when the resistance is decreased?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!