Lorenzo pushes on a heavy crate with an applied force of 250 N at an angle of 30° below the horizontal. The force of friction opposing the applied force is 95 N. If the mass of the crate is 45 kg, what is the acceleration of the crate?
A. 0.67 m/s2 forward
B. 1.7 m/s2 forward
C. 2.7 m/s2 forward
D. 3.4 m/s2 forward
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Answers
Answer:
A. 0.67 m/s² forward
Explanation:
F applied = 250 N
Fsin30 = 250/2 = 125N
F friction= 95 N
Fnet = F app - F fri
= 125-95
= 30 N ( forward)
Fnet = m a
30 = 45 a
a= 30/45
=2/3
= 0.67 m/s² (forward)
Related Questions
What is the initial velocity of a moose who
accelerates uniformly at 1.5 m/s/s for 5 seconds and
finishes with a velocity of 7 m/s?
Answers
Answer:
- 0.5 m/s
Explanation:
(1) Acceleration = change in velocity / time
(2) Change in velocity = (Final velocity - Initial velocity)
We know:
acceleration = 1.5 m/s/s
time = 5 seconds
final velocity = 7 m/s
x = initial velocity)
1.5 = ( 7 - x ) / 5
1.5 x 5 = ( 7 - x )
7.5 = 7 - x
x = -0.5 m/s
You can check the answer by plugging in the values to equation (1).
An arrow fired horizontally at 44m/s travels 23m horizontally before it hits the ground From what height was it fired?
Answers
HELP I SUBMITTED 30 POINTS
Find calculated displacement.
Velocity - 70 m/s
Time - 4s
Initial position- 0m
Final Position- 50m
Calculated Displacement(m) - ?
No spam Ive had enough of that
Answers
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Let's Calculate the displacement :
we know that displacement is the shortest distance between two points (i.e final position - initial position). so here displacement :
50 - 0 = 50mWhy is the temperature of a normal healthy old man is less than that of a normal healthy young man?
Answers
Answer:
Normal body temperature does not change much with aging. But as you get older, it becomes harder for your body to control its temperature. A decrease in the amount of fat below the skin makes it harder to stay warm.
NEED HELP!!! 11 POINTS!!!
Based on Newton’s third law of motion, will a tennis ball go farther if it hits a tennis racquet that is still or one that is in motion?
OPTIONS:
A.
One that is still because it will absorb all of the force of the ball.
B.
One that is still because that will have a greater impact on the trajectory.
C.
One that is in motion because both the ball and the racquet will contribute momentum.
D.
One that is in motion because the racquet’s force will cancel the ball’s force out.
Answers
Answer:
c
Explanation:
because if a tennis ball hit a tennis racket still it would not go anywhere. with the tennis ball hitting the moving racket it will go further
One that is in motion because both the ball and the racquet will contribute momentum.
Thus, option (c) is correct.
Newton's third law of motion states that for every action, there is an equal and opposite reaction.
When the tennis ball hits a tennis racquet in motion, both the ball and the racquet will exert forces on each other in opposite directions.
This interaction will result in a transfer of momentum from the racquet to the ball and vice versa, potentially giving the ball a greater momentum and therefore potentially causing it to go farther.
Thus, option (c) is correct.
Learn more about Newton's third law here:
https://brainly.com/question/34706880
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A student is given a red and a blue liquid. The two samples of liquids are
heated in identical beakers over identical Bunsen burners. The red liquid
shows a dramatically faster increase in temperature. Which of these is the
most likely explanation for this? *
O A) The red liquid has a greater mass.
O B) The blue liquid has a smaller mass.
O C) The red liquid has a greater specific heat.
OD) The red liquid has a smaller specific heat
Answers
When a substance has smaller specific heat it needs less heat to shows changes in it hence making the option D correct.
Answer:
option D) the red liquid has a smaller specific heat
Explanation:
What is the final monetum of the artist clay system immediately after the collision
Answers
Answer:
the total mass of the objects multiplied by their velocity.
The table contains the planets in our solar system in order of their average distance from the Sun and their corresponding diameters. The first step in creating a model of the solar system is to scale these large diameters into smaller, more manageable numbers. Eventually, we’ll represent these numbers using circles drawn on paper. MercuryVenusEarthMarsJupiterSaturnUranusNeptune Diameter (km)487912,10412,7566792142,984120,53651,11849,528 Scaled Diameter (cm) 3.51.9 The ratio between Earth’s actual diameter and its scaled diameter can be used to find the scaled diameter of the other planets. Earth’s diameter of 12,756 kilometers is scaled to 3.5 centimeters as shown in the table. Now let’s find the scaled diameter of Mars as an example. Using the calculations shown, Mars’s diameter of 6,792 would be scaled to 1.9 centimeters. d × 12,756 = 6,792 × 3.5 d = 1.9 cm Use this same process to complete the table with the scaled diameters of the other planets. Round each answer to the tenths place. If you need additional math help, visit the Proportions section of the Math Review.
Answers
The scaled diameters of the missing planets are listed below:
Mercury 1.4 cm
Venus 3.3 cm
Mars 1.9 cm
Jupiter 39.2 cm
Saturn 33.1 cm
Uranus 14.0 cm
Neptune 13.6 cm
How to determine the scaled diameters of a planet
In this question we must use conversion factor to calculate the scaled diameters by means of the following direct relationship:
d = k · D (1)
Where:
D - Real diameter, in kilometers.d - Scaled diameter, in centimeters.k - Conversion factor, in centimeters per kilometer.The conversion factor is found by using the real and scaled diameter of the Earth:
k = 3.5 cm/12,756 km
k = 7/25512 cm/km
Then, we determine the scaled diameters of the rest of planets:
Mercury 1.4 cm
Venus 3.3 cm
Mars 1.9 cm
Jupiter 39.2 cm
Saturn 33.1 cm
Uranus 14.0 cm
Neptune 13.6 cm
Remark
The statement reports a table with numerous mistakes, the correct table is shown below:
Planet Diameter (km) Scaled Diameter (cm)
Mercury 4,879
Venus 12,104
Earth 12,756 3.5
Mars 6,792
Jupiter 142,984
Saturn 120,536
Uranus 51,118
Neptune 49,528
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I NEED A 100% ACCURATE ANSWER FOR THIS QUESTION ASAP NO LINKS !!!
Answers
Answer:
B
Explanation:
Which of the following is true statement about speed?
a) Speed has no magnitude and direction
b) Speed has magnitude but no direction
c) Speed has both magnitude and direction
D) speed has magnitude but no direction
Answers
B and D are both the same statement.
It's the correct one.
I need help please
I’ll give BRAINLIST for correct answers!!
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Answer:
1. the graph is showing the speed of the object at different times.
Explanation:
2. the object is slowing down
What is the density of an object that weighs 500 kg and has a volume of .4 cubic meters ?
Answers
Answer:
1250 for .4
125 for 4
Explanation:
[tex]p=\frac{m}{v}[/tex]
500/4 = 125
500/.4 = 1250
how to find the density of air?
Answers
3. A block is pushed with 30N of force this changes the velocity from 20m/s to
30m/s, after 2 seconds. What is the mass?
Answers
let's find the acceleration first :
[tex] \boxed{a = \frac{v - u}{t} }[/tex][tex]a = \dfrac{30 - 20}{2} [/tex][tex]a = \dfrac{10}{2} [/tex][tex]a = 5 \: \: ms {}^{ - 2} [/tex]now, we know that :
[tex]f orce= mass \times acceleration[/tex][tex]30 = m \times 5[/tex][tex]m = \dfrac{30}{5} [/tex][tex]m = 6 \: \: kg[/tex]hence, mass = 6kg
an object is moving forward with a constant velocity. which statement about this object must be true?
Answers
Answer:
• Its acceleration is zero
Explanation:
from definition of acceleration:
[tex]{ \rm{acceleration = \frac{change \: in \: velocity}{time} }} \\ \\ { \rm{acceleration = \frac{ \delta \: (velocity)}{time} }}[/tex]
• since velocity is constant, change in velocity is zero
[tex]{ \boxed{ \rm{ \delta \: (velocity) = 0}}}[/tex]
• therefore:
[tex]{ \rm{acceleration = \frac{0}{time} }} \\ \\ { \boxed{ \tt{acceleration = 0 \: m {s}^{ - 2} }}}[/tex]
newton’s law of gravity says the gravitational force between two objects is proportional to:
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Answer:
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the energy carried by sound waves is called -
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Answer:
kinetic mechanical energy
Answer:
Those sound waves are called kinetic mechanical energy
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Answer:
I put friction and applied
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Answer:
Cr(OH)3 + 3 HCLO4 → Cr(CLO4)3 + 3H2O
Stoichiometry balancing +
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Answers
Answer:
a = (v2 - v1) / t
a t = v2 - v1
v1 = v2 - a t
v1 = 28 m/s - 6 m/s^2 * 4 s = 4 m/s
1. When an apple falls towards the earth , the earth moves up to meet the apple. Is this true? If yes , why is the earth's motion not noticeable ?
2. An astronaut is said to be weightless when he/she travels in a satellite. Does it mean that the earth does not attract him / her ? Give reason.
3. What happens to the weight of a body when it is falling freely under the action of gravity ?
Help!! Random/Irrelevant / Plagiarised answers will be reported*
<3 Thanks! :)
Answers
Answer:
1.no because the apple fall towards the earth due to gravity.
2.Yes because when he/she is too far from earth the earth's gravity is not strong enough to pull them down and because there is no gravity in space.
3.It falls down and becomes much more heavy.
Explanation:
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ayudenme pls es urgente es nota del cohorte
Answers
Answer:
500m
Explanation:
because 250+250 goood
What is 4.33 and 2.16?
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A ___________ will help you plan the rest of your life around this fitness priority. A. coach B. fitness goal C. fitness evaluation D. weekly plan
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Answer:
B. fitness goal I believe. please like this, I need points. ty!
Explanation:
La aceleración de un proyectil que describe una trayectoria parabólica cerca de la superficie terrestre es constante o variable
Answers
Answer:
Es una constante porque sigue funcionando y debido a la gravedad, tú tendrías que ser tú quien la detenga si está bajando en lugar de hacia arriba.
Explanation:
can a system have kinetic and potential energy at the same time
Answers
Answer:
yes
Explanation:
...........................
1)Why can't we use science to tell whether we should use a weapon or clone an animal? Explain.
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3)What are the 5 steps of the scientific method ? Explain what EACH one is.
4)What was one of the real examples of the scientific method we covered in class? (hint: spider, comet)
5)Why do we call the metric system the “SI” system in Science?
6)The Metric System is based on the meter and what other thing? Why does that make metric easier to understand?
7)What are 3 base units we use for Length, Volume, and Mass? How do you represent them with initials? Which one is capitalized?
8)
25 km = cm
800mg = g
12500 mL = L
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76kg = g
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10)What did these folks do wrong?
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An
A continuación, se explicará la incidencia que este recurso formal tiene en el significado completo del poema.
Which elements belong to the family known as noble gases?
Answers
Answer:
Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn)
Explanation:
hope this helps
when light bounces off a rough surface, in different directions, what is this called?