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
KatRina [158]
3 years ago
13

90cm uniform lever has a load 30N suspended at 15cm from one of it's end. If the fulcrum is at the center of gravity. The force

that must be applied at it's other hand to keep it in horizontal equilibrium is.​
Physics
1 answer:
solniwko [45]3 years ago
3 0

Answer: F = 20 N

Explanation:

I will ASSUME that the fulcrum is at the center of gravity of the lever arm, This means that the lever arm itself creates no moment about the fulcrum because there is no moment arm for that particular force.

To solve, we sum moments about any convenient point to zero (zero because there is no acceleration in the F = ma equation)

The easiest convenient point is the fulcrum

30((90/2) - 15) - F(90/2) = 0

           30(30) = F(45)

                    F = 900/45 = 20 N

You might be interested in
A car is behind a truck going 25 m/s on the highway. The car’s driver looks for an opportunity to pass, guessing that his car ca
user100 [1]

Answer:

No he should not attempt the pass

Explanation:

Let t be the time it takes for the car to pass the truck. The driver should ONLY attempt to pass when the distance covered by himself plus the distance covered by the oncoming car is less than or equal 400 m (a near miss)

At acceleration of 1m/s2 and a clear distance of 10 + 20 + 10 = 40 m, we can use the following equation of motion to estimate the time t in seconds

s = at^2/2

40 = 1t^2/2

t^2 = 80

t = \sqrt{80} = 8.94 s

Within this time frame, the first car would have traveled a total distance of the clear distance (40m) plus the distance run by the truck, which is

8.94 * 25 = 223.6m

So the total distance traveled by the first car is 223.6 + 40 = 263.6m

The distance traveled by the 2nd car within 8.94 s at rate of 25m/s is

8.94 * 25 = 223.6 m

So the total distance covered by both cars within this time frame

223.6 + 263.6 = 487.2m > 400 m

So no, he should not attempt the pass as we will not clear it in time.

8 0
3 years ago
PLS HELP!!
Alenkasestr [34]

Answer:

As an object falls from rest, its gravitational potential energy is converted to kinetic energy.

Explanation:

It converts to kinetic energy because it is moving

7 0
3 years ago
Which trait would most likely lead a scientist to investigate a blood-thinning agent in the saliva of vampire bats?
zheka24 [161]

What will most likely lead a scientist to investigate a blood-thinning agent in the saliva of vampire bats is curiosity.

<h3>What is curiosity?</h3>

Curiosity is defined as an inquisitive trait which is one of the qualities of a good scientist which drives them to discover more in their field.

For a scientist to investigate a blood-thinning agent in the saliva of vampire bats would have been driven by curiosity to do so.

Learn more about blood-thinning agent here:

brainly.com/question/14127097

#SPJ1

8 0
2 years ago
Two car horns are sounded creating two sound waves with frequencies that differ by a factor of three. How does the speed of the
Andrews [41]

Answer:

Remains the same

Explanation:

The speed of waves of higher and lower frequency both will be same.

the speed of sound in a medium is constant  and independent of it's frequency. Moreover, when the frequency changes wavelength changes accordingly, such that their product remains constant.

we know that

υ×λ = constant = velocity

υ= frequency

λ= wavelength.

7 0
3 years ago
2. a) If a bottle was filled with a liquid, tightly
kow [346]

Answer:

bottle might burst

Explanation:

because liquid inside will expand and exert pressure on walls of the bottle.

6 0
3 years ago
Other questions:
  • Which statement explains how an ionic bond and a covalent bond differ?
    8·2 answers
  • The average marathon is 42 km long. If the average person can run the marathon with an average velocity of 2.57 m/s, how long wi
    13·1 answer
  • The potential (relative to infinity) at the midpoint of a square is 3.0 V when a point charge of +Q is located at one of the cor
    9·1 answer
  • Two like charges are separated by some distance. Describe the quantitatively what will happen to the force exerted by one charge
    10·1 answer
  • A submarine dives to a depth of 100-m beneath the surface of the Pacific Ocean. The density of sea water is 1030 kg/m3. The subm
    13·1 answer
  • If the current is cut in half and the resistance is increased by a factor of three, how will the power be affected?
    6·1 answer
  • A crate is sliding down an inclined ramp at a constant speed of 0.55 m/s. The vector sum of all the forces acting on this crate
    5·1 answer
  • Explain how it is possible for the smallest white dwarfs to be the most massive.
    11·1 answer
  • Question:
    7·1 answer
  • Heat energy always moves from a _ _ _ place to a _ _ _ _ _ _ place. The three methods of heat transfer are?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!