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
Dafna1 [17]
3 years ago
15

Find the net force of the box and the acceleration. 10 points. Will give brainliest.

Physics
1 answer:
zysi [14]3 years ago
4 0

Answer:

38.6 N

2.57 m/s²

Explanation:

Draw a free body diagram of the box.  There are four forces:

Weight force mg pulling down,

Normal force N pushing up,

Friction force Nμ pushing left,

and applied force P pulling at an angle 40°.

Sum of forces in the y direction:

∑F = ma

N + P sin 40° − mg = 0

N = mg − P sin 40°

The net force in the x direction is:

∑F = P cos 40° − Nμ

∑F = P cos 40° − (mg − P sin 40°) μ

∑F = P cos 40° − mgμ + Pμ sin 40°

∑F = P (cos 40° + μ sin 40°) − mgμ

Plugging in values:

∑F = (80 N) (cos 40° + 0.23 sin 40°) − (15 kg) (10 m/s²) (0.23)

∑F = 38.6 N

Net force equals mass times acceleration:

∑F = ma

38.6 N = (15 kg) a

a = 2.57 m/s²

You might be interested in
A battery operated DVD player uses 12 DV volts from AA batteries and draws a current of 3 A. Calculate the resistance.
serg [7]
4 ohms .. Hope this helps
3 0
3 years ago
A waitperson carrying a tray with a platter on it tips the tray at an angle of 12° below the horizontal. If the gravitational fo
Nadusha1986 [10]

Answer:

The answer is 1.0 N

Explanation:

inclination of tray=12^{\circ}

gravitational Force=5 N

Now this gravitational force has two component i.e.

5\sin \theta  is parallel to the tray =1.039 N

5\cos \theta  is perpendicular to the tray =4.890 N

7 0
3 years ago
Kevin is refinishing his rusty wheelbarrow. He moves his sandpaper back and forth 45 times over a rusty area, each time moving a
dmitriy555 [2]
W = _|....F*dx*cos(a)........With F=force, x=distance over which force acts on object,
.......0.............................and a=angle between force and direction of travel.

Since the force is constant in this case we don't need the equation to be an integral expression, and since the force in question - the force of friction - is always precisely opposite the direction of travel (which makes (a) equal to 180 deg, and cos(a) equal to -1) the equation can be rewritted like so:

W = F*x*(-1) ............ or ............. W = -F*x

The force of friction is given by the equation: Ffriction = Fnormal*(coeff of friction)

Also, note that the total work is the sum of all 45 passes by the sandpaper. So our final equation, when Ffriction is substituted, is:

W = (-45)(Fnormal)(coeff of friction)(distance)
W = (-45)...(1.8N).........(0.92).........(0.15m)
W = ................-11.178 Joules
5 0
3 years ago
10. In Freudian theory, which one of the following is an example of a Thanatos instinct, which includes aggression, trauma, and
Lelechka [254]
D substance abuse :) hope this helps
8 0
2 years ago
What is the Coriolis Effect?
Crazy boy [7]

Answer:

An effect whereby a mass moving in a rotating system experienced a force acting perpendicular to the direction of motion and to the axis of rotation.

3 0
3 years ago
Other questions:
  • Metals are good conductors of electricity because their protons can roam freely throughout the material. True False
    5·1 answer
  • Using aluminum wire(2.82x10^-8 ohm) of diameter 1.60mm, you want to wind a resistor that will dissipate 25.0 W when 25.0 V is ap
    7·1 answer
  • An athlete rotates a 1.00-kg discus along a circular path of radius 1.09 m. The maximum speed of the discus is 17.0 m/s. Determi
    7·1 answer
  • What is the name for point along an axon where an impulse jumps
    7·1 answer
  • An experiment is conducted on a long straight wire of diameter d. A constant current is sent through the wire and the magnetic f
    13·1 answer
  • You are considering developing a new food-chopping appliance which uses an Arduino with a touchscreen to control the motor. You
    10·1 answer
  • During one year a population of blue jays has zero population growth. which must be true about the blue jay population at the en
    10·2 answers
  • Ashley decides to enter her pet turtle in a race. She knows her turtle can travel at a rate of 2 meters per hour. The race track
    8·1 answer
  • What is the electric current if a resistance of 100 Q and voltage of 12.0 V?
    10·2 answers
  • Why does the law of conversion of mass make sense?​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!