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
Anna35 [415]
3 years ago
7

Please help me with this question

Physics
1 answer:
Zina [86]3 years ago
4 0

Answer:

D. The truck and trailer will experience a net force of 40 newtons backward

Explanation:

Taking the greatest force (trailer), and subtracting it by the smaller force (truck), we can find how many newtons the greater force is applying to pull the whole system:

2,790 - 2,750 = 40 N

Since we know that the trailer is the greater force, the truck & trailer are being pulled backwards by 40 Newtons

You might be interested in
What is A rounded to the nearest tenth?
aniked [119]

Answer: B

Explanition:

7 0
2 years ago
4. A rock is thrown from the edge of the top of a 100 m tall building at some unknown angle above the horizontal. The rock strik
nikklg [1K]

Answer:

Explanation:

Let the velocity of projectile be v and angle of throw be θ.

The projectile takes 5 s to touch the ground during which period it falls vertically by 100 m

considering its vertical displacement

h = - ut +1/2 g t²

100 = - vsinθ x 5 + .5 x 9.8 x 5²

5vsinθ =  222.5

vsinθ = 44.5

It covers 160 horizontally in 5 s

vcosθ x 5 = 160

v cosθ = 32

squaring and adding

v²sin²θ +v² cos²θ = 44.4² + 32²

v² = 1971.36 + 1024

v = 54.73 m /s

5 0
3 years ago
Read 2 more answers
1.which of the following are true.
Ksivusya [100]

B is the correct answer

3 0
3 years ago
Read 2 more answers
Scientific notation and graphing <br><br> 0.0004580 to scientific notation
Vlada [557]

Scientific Notation: 4.580 x 10^-4

Scientific e Notation: 4.580e-4

4 0
3 years ago
Read 2 more answers
A fan cart initially has an acceleration of 1.6m/s/s when it's fan is directed straight backwards. If you rotate the fan by 45°,
Sholpan [36]

Answer:

A Fan Cart Initially Has An Acceleration Of 1.6m/s/s When It's Fan Is Directed Straight Backwards. If You Rotate The Fan By 45o, By What Percentage Do You Expect The Fan Cart's Thrust To Decrease? (Answer Should Be In Units Of 96)

a. 45%

b. 29%

c. 71%

d. 50%

The correct answer is d.

d. 50%

Explanation:

Fan cart acceleration = 1.6 m/s²

Thrust = 0.25×π×D²×ρ×v×Δv

where Δv = acceleration component and all factors remaining cconstant, when the fan is rotated by 45 ° the diameter changes to D₂ = sin 45 ×D

or 0.707×D. The thrust becomes 0.25×π×(0.707×D)²×ρ×v×Δv

=0.25×π×0.5×D²×ρ×v×Δv or 0.5(0.25×π×D²×ρ×v×Δv)

That is the thrust reduces by 50 %

3 0
3 years ago
Other questions:
  • 4: Which of the following is true of an object in a circular motion at a constant speed?
    6·1 answer
  • Suppose the initial position of an object is zero, the starting velocity is 3 m/s and the final velocity was 10 m/s. The object
    10·2 answers
  • Power lifter Paul lifts a 700.0kg barbell 2.00m in 0.400s. How much power did Paul develop?
    7·2 answers
  • Calculate the wavelength (in nm) of light that produces its first minimum at an angle of 21.0° when falling on a single slit of
    12·1 answer
  • Exposure to what type of radiant energy is sensed by human skin as warmth?
    10·2 answers
  • LIULIS.<br> What would happen to speed if distance increased in the same amount of time?
    14·1 answer
  • If a girl walks 6km due west changes directions and walk another 5km due north. Find her displacement in both magnitude and dire
    9·1 answer
  • If you are a cartographer, what will give you an idea that the continents were once joined?
    10·2 answers
  • 500 J of work is used to decrease the angular velocity of a disk from 65 rad/s to 52 rad/s.What is the rotational inertia of the
    15·1 answer
  • Help me with the following problem
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!