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oksian1 [2.3K]
3 years ago
7

A student throws a 130 g snowball at 6.5 m/s at the side of the schoolhouse, where it hits and sticks. What is the magnitude of

the average force on the wall if the duration of the collision is 0.18 s?
Physics
1 answer:
Alex73 [517]3 years ago
8 0

Answer:

4.7 N

Explanation:

130 g = 0.13 kg

The momentum of the snowball when it's thrown at the wall is

p = mv = 0.13*6.5 = 0.845 kgm/s

Which is also the impulse. From here we can calculate the magnitude of the average force F knowing the duration of the collision is 0.18 s

p = F\Delta t

F*0.18 = 0.845

F = 0.845 / 0.18 = 4.7 N

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Based on the Law of Conservation of Energy, which of the below is true?(1 point)
Veseljchak [2.6K]

Answer:

C

Explanation:

why because if something is conserved, it is constant, and does not change with time. A moving body may change its position, acceleration, and velocity with time, but it's energy is constant. The conversation of energy law states that: In any closed system (isolated system) the total energy of the system remain constant.

Mathematically it is written as

pe + ke = pe + ke

8 0
1 year ago
What is the λ if v = 75 m/s and ƒ = 25 Hz?
Talja [164]
You need to add more information
5 0
2 years ago
Find the average velocity of the following 4 velocity measurements:
andriy [413]

The average velocity of the following 4 velocity measurements will be d) 8.7 m/s

average of given velocities  = sum of all velocities divided by number of velocity mentioned in the question

average velocity = ( v1 + v2 + v3 + v4 ) / 4

                            = ( 9.6 + 8.8 + 7.6 + 8.7 ) / 4 = 8.675 ≈ 8.7 m/s

correct answer d)

The average velocity of the following 4 velocity measurements will be d) 8.7 m/s

To learn more about velocity here :

brainly.com/question/18084516

#SPJ1

4 0
11 months ago
A. Calculate the electric potential energy stored in a capacitor that stores <img src="https://tex.z-dn.net/?f=3.40%20x%2010%5E%
sertanlavr [38]

Part a)

As we know that energy stored inside the capacitor is given as

U = \frac{1}{2}CV^2

for a given capacitor we know

Q = CV

Now we can use it in above equation to find the energy

U = \frac{1}{2}QV

U = \frac{1}{2}(3.4\times 10^{-6})(24)

U = 40.8\times 10^{-6} J

PART b)

If two negative charges are hold near to each other and then released

Then due to mutual repulsion they start moving away from each other

Due to mutual repulsion as the two charges moving away the electrostatic potential energy of two charges will convert into kinetic energy of the two charges.

So here as they move apart kinetic energy will increase while potential energy will decrease

Part c)

As we know that capacitance is given as

C = \frac{Q}{V}

here we know that

Q = 3\times 10^{-10}C

V = 35 volts

C = \frac{3\times 10^{-10}}{35}

C = 8.6 \times 10^{-12} F

5 0
3 years ago
Read 2 more answers
The cylindrical tub of a dryer in a laundromat rotates counterclockwise about a horizontal axis at 41.5 rev/min as it dries the
frozen [14]

Answer:

\theta = 49.81^0

Explanation:

Given that:

\omega = 41.5 \ rev/min\\\\\omega = 41.5 *\frac{1}{60}* 2 \pi\\\\\omega = 4.45 \ rad/s\\\\\\diameter = 0.748 m

If we let the piece of the close lose contact at ∠θ;

Then ; from force balance;

we have:

\\\\mg sin \theta = \frac{mv^2}{r}\\\\sin \theta = \frac{2v^2}{dg}\\\\\theta = sin^{-1} (\frac{2v^2}{dg})

where;

v = \frac{\omega d}{2}\\\\v =  \frac{4.45 *0.748}{2}\\\\v = 1.6643\\\\v^2 = 2.77

Again:

\theta = sin^{-1}(\frac{2v^2}{dg})\\\\\theta = sin^{-1}( \frac{2*2.77}{0.74*9.8})\\\\\theta = 49.81^0

6 0
2 years ago
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