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Ber [7]
3 years ago
8

The table represents the forces on four objects, with directions.

Physics
2 answers:
slavikrds [6]3 years ago
7 0
The answer is B: <span> Objects W and Y have balanced forces, and objects X and Z have unbalanced forces. </span>
noname [10]3 years ago
5 0

b. Objects W and Y have balanced forces, and objects X and Z have unbalanced forces.

Explanation:

An object is said to have balanced forces if the resultant of the forces acting on it is zero. This situation occurs, for instance, when the sum of the forces on the vertical direction is zero and the sum of the forces on the horizontal direction is zero as well.

For the objects in the table, we see that:

- Object W: the resultant on the vertical direction is zero, because we have two opposite forces with same magnitude (30 N), so they cancel each other. Also, the resultant on the horizontal direction is zero, because we have two opposite forces with same magnitude (20 N), so they cancel each other.

- Object X: the resultant on the vertical direction is zero, because we have two opposite forces with same magnitude (15 N), so they cancel each other. However, the resultant on the horizontal direction is NOT zero, because we have two opposite forces but with different magnitude (35 N and 25 N), so they do not cancel each other, and they make a net force of 35 N - 25 N=10 N.

- Object Y:  the resultant on the vertical direction is zero, because we have two opposite forces with same magnitude (60 N), so they cancel each other. Also, the resultant on the horizontal direction is zero, because we do not have forces along this direction.

- Object Z: the resultant on the vertical direction is zero, because we have two opposite forces with same magnitude (45 N), so they cancel each other. However, the resultant on the horizontal direction is NOT zero, because the net force is 22 N, not balanced from the other direction.

Therefore, objects W and Y have balanced forces, and objects X and Z have unbalanced forces.

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A helium balloon ride lifts up passengers in a basket. Assume the density of air is 1.28 kg/m3 and the density of helium in the
marysya [2.9K]

Answer:

Explanation:

1 ) the volume of helium in the balloon when fully inflated

= 4/3 π R³

= 4/3 x 3.14 x 5.3³

= 623.3 m³

2 ) force of gravity on the entire system ,but with no people

= (mass of the empty balloon and basket + mass of helium )x g

=( 129 +  623.3 x.18 )x 9.8

= 2363.7 N

3 )  magnitude of the buoyant force on the entire system (but with no people )

( Volume of empty balloon + basket + volume of helium ) density of air x g

( 0.057 + 623.3 ) x 1.23 x 9.8

= 7513.94 N

4 )  magnitude of the force of gravity on each person

Mass of each person x g

= 71 x 9.8

= 695.8 N

6 0
2 years ago
Is it correct to say that constant speed = 0 acceleration = no resultant force?
stepan [7]
Nope......... Constant speed but change in direction can cause acceleration which would give a finite force........
8 0
3 years ago
________ describes the unique sound quality or tone color of a sound.
mylen [45]
Where are the answers
5 0
3 years ago
Throughout the problem, take the speed of sound in air to be 343 m/s . Part A Consider a pipe of length 80.0 cm open at both end
White raven [17]

Answer:

the lowest frequency f of the sound wave is 214.375 Hz

Explanation:

The computation of the lowest frequency f of the sound wave is shown below;

Length = L= 80 cm

= 0.8 m

V = 343 m/s (sound speed in air )

Now

V1 = n V ÷ 2 L

= 1 × 343 ÷ 2 × 0.8

V1 = 214.375 Hz

Hence, the lowest frequency f of the sound wave is 214.375 Hz

We simply applied the above formula so that the correct value could come

And, the same is to be considered  

6 0
3 years ago
Three cars, car x, car y, and car z, begin accelerating from rest, at the same time. car x is more massive than car y, which is
grigory [225]

When the net force exerted on each car is identical. after 10 seconds, the amount of momentum is same for all cars.

<h3>What is impulse?</h3>

The change in momentum is equal to the product of impact force applied while colliding and time for that impact.

F. t = m (Vf -Vi)

where, Vf is the final velocity and Vi is the initial velocity.

For car X, Fx x t = Mx Vx

For car Y, Fy x t = My Vy

For car Z, Fz x t = Mz Vz

The force applied is same for all and the the time is also same equal to 10 seconds. The impulse is same for all the cars.

Thus, the three cars have same momentum.

Learn more about impulse.

brainly.com/question/16980676

#SPJ1

6 0
2 years ago
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