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
Zielflug [23.3K]
3 years ago
14

the coefficient of static friction between a 40 kg picnic table and the ground below is .43. what is the greatest horizontal for

ce that could be exerted on the table while it remains stationary?
Physics
2 answers:
Mashcka [7]3 years ago
6 0

Answer:

The greatest horizontal force that can be exerted without moving the table is 168.56N.

Explanation:

The maximum friction force is determined from the coefficient of static friction as follows:

F_{fr}=\mu\cdot F_{norm} = 0.43\cdot F_{norm}

where the the normal force is exerted by the ground as a reaction to the weight of the table, and has same magnitude as but opposite direction to the gravitational force on the table:

F_{fr} = 0.43\cdot 40kg\cdot 9.8 \frac{m}{s^2} = 168.56 N

This is the <em>maximum</em> static force, so the friction force will be matching and opposing any horizontal force up to 168.56N.

Gre4nikov [31]3 years ago
4 0
The force equals the coefficient of static friction times the weight. Use gravity g=9.8 m/s^2
0.43*40*9.8=16.856 N
You might be interested in
Calculate a pendulum's frequency of oscillation (in Hz) if the pendulum completes one cycle in 0.5 s.
Marina86 [1]
Time taken to complete one oscillation for a pendulum is Time Period, T = 0.5 s 
Frequency of the pendulum oscillation = 1 / Time Period => f = 1 / T = 1 / 0.5  
Frequency f = 2 Hz
3 0
3 years ago
Electric fan converts<br>​
Darya [45]

Answer:

B

Explanation:

it's converts electrical energy to mechanical energy.

3 0
2 years ago
Read 2 more answers
Graphs help you see ______.
Anastaziya [24]
D- if i was right please mark me as a brainliest answer and a thank you
4 0
3 years ago
Read 2 more answers
A box is placed on a table. If an upward pulling force on the box is slightly less than the weight of the box, what will happen
aniked [119]

Answer:

<u><em>A for certain.</em></u>

Explanation:

I got it right on the test, thanks to the other brainly answerer teresecaway. But knowing the answer doesnt help much if you dont know WHY. The reason WHY is as follows. At first you might think it would be B, because the downwards force is greater than the upwards force. I thought that maybe upwards force would also count as the table supporting it, but no, thats just structural inanimate solid table. The answer is A. gravity would have to be HIGHLY raised or somebody pressing down on it, to make it fall through the table.

5 0
3 years ago
Three people pull simultaneously on a stubborn donkey. jack pulls eastward with a force of 92.5 n, jill pulls with 89.9 n in the
alekssr [168]
Jack------------ force of 92.5 n   eastward-------Fjack(X)=92.5 n   Fjack(Y)=0

<span>jill ------------------------------- force of 89.9 n   northeast
Fjill(X)=cos45*89.9=63.57 n
</span>Fjill(Y)=sin45*89.9=63.57 n<span>

</span>jane -----------------------------force of 163 n   southeast
Fjane(X)=cos45*163=115.26 n
Fjane(X)=-sin45*163=-115.26 n

Ftotal (X)=92.5+63.57+115.26=271.33 n
Ftotal (Y)=0+63.57-115.26=-51.69 n

Fotal=((271.33)^2+(-115.26)^2) ^0.5=294.80 n southeast

the magnitude of the net force the people exert on the donkey. is 294.80 n southeast
7 0
3 years ago
Other questions:
  • Please help! Just answer these questions
    7·1 answer
  • T or F science is a continually evolving discipline
    15·2 answers
  • When tension is applied to a metal wire of length L , it stretches by Δ L . If the same tension is applied to a metal wire of th
    11·2 answers
  • ______ clouds are formed when air masses rise vertically in the atmosphere.
    8·2 answers
  • 2/25/20 or 2/28/20 Dispatch #53
    6·1 answer
  • Forms a thin layer of gases around earth
    12·1 answer
  • Question 15 of 15
    9·1 answer
  • Scavengers are organisms that help clean a habitat by feeding on dead or rotting flesh. They help break down the remains left be
    7·2 answers
  • How is newton's first law used in basketball?
    12·1 answer
  • Activity log - Chest and Back Record your time and activity below and in your unit fitness log. If a particular category does no
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!