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
Mamont248 [21]
3 years ago
14

Please help me on calculating Net Force, examples E and D in the attachment. Would be grateful if you'd explain. Thank you.

Physics
1 answer:
Yanka [14]3 years ago
8 0
The net force is force applied + force friction ( which is negative ) Unfortunately for some reason the numbers are negative, could you ask your teach about that?

Btw, left is usually force fric. which makes it negative

(-750+-250+-550)+1563 = net force

(-792+-632+-100)+(400+900) = net force
You might be interested in
A bike race against the clock takes place on a straight road. Yan drives at 37 km / h and he starts the course 30s before Christ
joja [24]

Given data:

Yan speed;

u_1=37\text{ km/h}

Christopher speed;

u_2=38.9\text{ km/h}

Christophe starts 30 s later than Yan. Therefore, Christophe takes 30 s less than Yan to reach the same distance.

Part (A)

The distance is given as,

d=ut

Let both Yan and Christophe meet at d distance from the start position. Therefore,

u_1t=u_2(t-30)

Substituting all known values,

\begin{gathered} (37\text{ km/h})t=(38.9\text{ km/h})\times(t-30) \\ \frac{(37\text{ km/h})}{(38.9\text{ km/h})}=\frac{(t-30)}{t} \\ 0.95=1-\frac{30}{t} \\ \frac{30}{t}=1-0.95 \\ \frac{30}{t}=0.05 \\ t=\frac{30}{0.05} \\ t=600\text{ s} \end{gathered}

Therefore, 600 s after Yan's departure Christophe will join him.

Part (B)

The distance is given as,

d=u_1t

Substituting all known values,

\begin{gathered} d=(37\text{ km/h})\times(600\text{ s}) \\ =(37\text{ km/h})\times(600\text{ s})\times(\frac{1\text{ hr}}{3600\text{ s}}) \\ \approx6.17\text{ km} \end{gathered}

Therefore, Christophe joins Yan after 6.17 km from the start.

3 0
1 year ago
A marching band is practicing. The band director sees the drum major hit a drum. How far away is the director if he hears the dr
ivanzaharov [21]

Answer:

825 m

Explanation:

330 m/s

1 / 0.40 = 2.5

330 x 2.5 = 825

7 0
3 years ago
Determine the energy stored in a parallel plate capacitor that is charged to a potential difference of 150 V. The plates are 4.5
Misha Larkins [42]

Answer: E = 1.93×10^-7 J

Explanation: The formulae for getting the energy stored in a capacitor is given as

E =Cv²/2

Where E = energy stored in capacitor (joules), C = capacitance of capacitor (farad), v = applied voltage =150v.

The formulae implies that we need to get the capacitance of the capacitor (C) first before we can get the energy.

From the parameters given to us

Area of plates =A = 87.5cm² = 87.5/10000 = 0.00875m²

Distance between plates = d = 4.50mm = 4.50/1000 = 0.0045m

C = ε0A/d

Where ε0 = permittivity of free space = 8.85×10^-12 F/m

C = 8.85×10^-12 × 0.00875/ 0.0045

C = 7.743×10^-14/0.0045

C = 1.72×10^-11 F.

Recall that E = Cv²/2

E = ( 1.72×10^-11 × 150×150) /2

E = 3.87×10^-7/2

E = 1.93×10^-7 J

7 0
3 years ago
Which pair does NOT have an electric force between them?
fenix001 [56]

Answer:

Two Neutral

Explanation:

If; One postive, and one negative they would be attracked. >-<

If; one postive and the other was postive, (or vice versa) they would repel <->

they both have an electrical charge, and force.

Neutral's are Nueatral. they have to opisition or attraction= No electrical force.

5 0
4 years ago
Read 2 more answers
WHAT STEPS CAN YOU TAKE IF YOU BEEN A VICTIM OF ASSAULT
AfilCa [17]

Answer:

If you have a parental figure or guardian ask them for assistance. Contact a lawyer if you are willing to take action against your attacker.

3 0
3 years ago
Other questions:
  • A simple pendulum consists of a brass sphere of mass m = 1 kg suspended on a string of length L ≈ 1 meter. The pendulum oscillat
    7·1 answer
  • What is the magnitude of a point charge that produces a potential of -200V at a distance of 1.00 mm?
    12·1 answer
  • PLEASE HELP:)
    15·1 answer
  • A mass m=15.0 kg is pulled along a horizontal floor, with a coefficient of kinetic friction μk =0.06, for a distance d=8.5 m. Th
    13·1 answer
  • Why would a red apple appear black if you looked at it through a blue filter?
    7·1 answer
  • During energy conversions, some energy is always lost as _____. light , heat , electricity or chemical energy?
    14·2 answers
  • In the United States, which type of industry is often considered part of an oligopoly?
    15·2 answers
  • ANSWER PLEASE FAST I NEED IT
    15·1 answer
  • Car accelerates uniformly from 22.5 m/s to 46.1 m/s in 2.47
    10·1 answer
  • Changing states of matter
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!