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
hoa [83]
3 years ago
7

A 143-g baseball is flying through the air with a speed of 180 km/hr just after it is hit by a bat. If its velocity is at an ang

le of 37º above the horizontal and 22º north of east, find its momentum in unit-vector notation. Define east as x and north as y
Physics
1 answer:
Svetllana [295]3 years ago
5 0

To solve the problem it is necessary to apply the concepts related to the conservation of linear Moment, that is to say

P=mv

Where,

m = Mass

v = Velocity

P = Linear momentum

For the given data we have to:

v_1 = 180\frac{km}{h}(\frac{1h}{3600s})(\frac{1000m}{1km})

v_1 = 50m/s

The components of this force would be given by,

v_z = 50*sin37 = 30.09m/s

v_{x,y} = 50*cos37=39.93m/s \rightarrwAccording to the definition given at the end of the problem, this component corresponds to that expressed for x and y.

Applying the previous equation we have,

\vec{P} = m(39.93cos\theta \hat{i}+39.93sin\theta \hat{j}-30.09\hat{k})

<em>Note: The component at this direction must also decomposed</em>

The mass is 143g=0.143kg, then:

\vec{P} = (0.143)(39.93cos(22)\hat{i}+39.93sin(22) \hat{j}-30.09\hat{k})

Therefore the final vector is:

\vec{P} = 5.29\hat{i}+2.138\hat{j}-4.29\hat{k})

You might be interested in
A 15.0-kg child descends a slide 2.40 m high and reaches the bottom with a speed of 1.10 m/s .
pickupchik [31]

The thermal energy that is generated due to friction is 344J.

<h3>What is the thermal energy?</h3>

Now we know that the total mechanical energy in the system is constant. The loss in energy is given by the loss in energy.

Thus, the kinetic energy is given as;

KE = 0.5 * mv^2 =0.5 * 15.0-kg * (1.10 m/s)^2 = 9.1 J

PE = mgh = 15.0-kg * 9.8 m/s^2 *  2.40 m = 352.8 J

The thermal energy is; 352.8 J - 9.1 J = 344J

Learn more about thermal energy due to friction:brainly.com/question/7207509

#SPJ1

7 0
2 years ago
A pitcher throws a curveball that reaches the catcher in 0.61 s. The ball curves because it is spinning at an average angular ve
sashaice [31]

Answer:

22.36 rad

Explanation:

Applying,

ω = θ/t.............. Equation 1

Where ω  = angular velocity, θ = angular displacement of the baseball, t = time

make θ the subject of the equation

θ = ωt............... Equation 2

From the question,

Given: ω = 350 rev/min = 350(0.10472) = 36.652 rad/s, t = 0.61 s

Substitute these values into equation 1

θ = 0.61(36.652)

θ = 22.36 rad

Hence the angular displacement of the baseball is  22.36 rad

4 0
3 years ago
Write down any four points that should be considered during household wiring
Shalnov [3]
1. Safety equipment is available
2. Person attempting the task has some general knowledge about wiring
3. Not All Cable is Color-Coded
Cable-sheath color coding started in 2001 and is still voluntary. If you have older wiring, don’t assume it complies with the current color coding. However, most manufacturers now follow the standard color code.
4. Stranded wire is more flexible than solid. If you’re pulling wire through conduit, stranded wire makes it easier to get around corners and bends in the conduit. However, if the situation requires pushing wires through conduit, you’ll want to use solid wire.
8 0
3 years ago
Read 2 more answers
Unpolarized light of intensity I=10 falls on two successive polarizer wheels with the angle between the polarizer wheels e-60°.
yan [13]

Answer:

I=\frac{10}{4}

Explanation:

A polarizer changes the orientation of the oscillations of a light wave.

I₀ = Intensity of unpolarized light = 10

θ = Angle given to the polarizer = 60°

Intensity of light

I = I₀cos²θ

⇒I = 10cos²60

\\\Rightarrow I=10\times \frac{1}{2}\times \frac{1}{2}\\\Rightarrow I=\frac{10}{4}

So, the after passing through the second polarizer is \mathbf{\frac{10}{4}}

5 0
3 years ago
What is the temperature of a sample of gas when the average translational kinetic energy of a molecule in the sample is 8.37 × 1
-BARSIC- [3]

Answer:

404K

Explanation:

Data given, Kinetic Energy.K.E=8.37*10^-21J

Note: as the temperature of a is increase, the rate of random movement will increase, hence leading to more collision per unit time. Hence we can say that the relationship between the kinetic energy and the temperature is a direct variation.

This relationship can be expressed as

K.E=\frac{3}{2}KT

where K is a constant of value 1.38*10^-23

Hence if we substitute the values, we arrive at

T=\frac{2/3(8.37*10^{-21})}{1.38*10^-23}\\ T=404K

converting to degree we have 131^{0}C

4 0
3 years ago
Other questions:
  • Which states the purpose of an experiment?
    7·2 answers
  • What season is when the sun is least concentrated at the beginning of the season?
    12·2 answers
  • Materials in which electric charges move freely such as copper and aluminum are called
    5·1 answer
  • A speaker generates a continuous tone of 440 Hz. In the drawing, sound travels into a tube that splits into two segments, one lo
    10·1 answer
  • What is the braking force needed to bring a 15kg car going 35 m/s to a complete stop in 5s?
    15·1 answer
  • A pair of slits separated by 1 mm, are illuminated with monochromatic light of wavelength 411 nm. The light falls on a screen 1.
    15·1 answer
  • Newton's third law states that for every action force there is an equal and opposite reaction force. An idiot in your class says
    14·2 answers
  • A rock has a mass of 3.1 kg. What is its weight on earth
    14·1 answer
  • Calculate the accleration of a car if its velocity increases from 15m/s to 75m/s in 5 second​
    6·1 answer
  • In what subject could we see cross cutting concepts
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!