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
DerKrebs [107]
3 years ago
12

In a local bar, a customer slides an empty beer mug down the counter for a refill. the height of the counter is 1.15 m. the mug

slides off the counter and strikes the floor 1.50 m from the base of the counter. (a) with what velocity did the mug leave the counter? (b) what was the direction of the mug's velocity just before it hit the floor?

Physics
2 answers:
yarga [219]3 years ago
4 0

<span>A.    </span>Let’s say the horizontal component of the velocity is vx and the vertical is vy. <span>
Initially at t=0 (as the mug leaves the counter) the components are v0x and v0y. 
<span>v0y = 0 since the customer slides it horizontally so applied force is in the x component only.

<span>The equations for horizontal and vertical projectile motion are:
x = x0 + v0x t 
y = y0 + v0y t - 1/2 g t^2 = y0 - 1/2 g t^2 </span></span></span>

Setting the origin to be the end corner of the counter so that x0=0 and y0=0, hence:

x = v0x t

y = - 1/2 g t^2 

Given value are: x=1.50m and y=-1.15m (y is negative since mug is going down)

<span>1.50m = v0x t    ---->  v0x= 1.50/t</span>

<span>-1.15m = -(1/2) (9.81) t^2    -----> t =0.4842 s</span>

Calculating for v0x:

v0x = 3.10 m/s

<span>B.    </span>v0x is constant since there are no other horizontal forces so, v0x=vx=3.10m/s

vy can be calculated from the formula:

<span>vy = v0y + at         where a=-g (negative since going down)</span>

vy = -gt = -9.81 (0.4842)

vy = -4.75 m/s

 

Now to get the angle below the horizontal, tan(90-Ø) = -vx/vy

tan(90-Ø )= 3.1/4.75

Ø = 56.87˚<span> below the horizontal</span>

Pepsi [2]3 years ago
4 0

(a) The velocity of mug was 3.10 m/s

(b) The direction of the mug's velocity just about it hit the floor is about 56.9° below the horizontal

\texttt{ }

<h3>Further explanation</h3>

Acceleration is rate of change of velocity.

\large {\boxed {a = \frac{v - u}{t} } }

\large {\boxed {d = \frac{v + u}{2}~t } }

<em>a = acceleration ( m/s² )</em>

<em>v = final velocity ( m/s )</em>

<em>u = initial velocity ( m/s )</em>

<em>t = time taken ( s )</em>

<em>d = distance ( m )</em>

Let us now tackle the problem!

\texttt{ }

This problem is about Projectile Motion.

<u>Given:</u>

horizontal distance = x = 1.50 m

height of the counter = h = 1.15 m

<u>Unknown:</u>

a. initial velocity = u = ?

b. direction of the mug's velocity = θ = ?

<u>Solution:</u>

<em>Question a:</em>

x = ut

1.5 = ut

t = \frac{1.5}{u} → <em>Equation 1</em>

\texttt{ }

h = \frac{1}{2}gt^2

h = \frac{1}{2}g(\frac{1.5}{u})^2 ← <em>Equation 1</em>

1.15 = \frac{1}{2}(9.8)(\frac{1.5}{u})^2

1.15 = \frac{441}{40} \div u^2

u^2 = \frac{441}{40} \div 1.15

u^2 = \frac{441}{46}

u = \sqrt{\frac{441}{46}}

u \approx 3.10 \texttt{ m/s}

\texttt{ }

<em>Question b:</em>

\theta = \tan^{-1} \frac{v_y}{v_x}

\theta = \tan^{-1} \frac{-gt}{u}

\theta = \tan^{-1} \frac{-g\frac{x}{u}}{u}

\theta = \tan^{-1} \frac{-gx}{u^2}

\theta = \tan^{-1} \frac{-9.8(1.5)}{3.10^2}

\theta = \tan^{-1} (-\frac{23}{15})

\theta \approx -56.9^o \texttt{ to the horizontal}

\texttt{ }

<h3>Learn more</h3>
  • Velocity of Runner : brainly.com/question/3813437
  • Kinetic Energy : brainly.com/question/692781
  • Acceleration : brainly.com/question/2283922
  • The Speed of Car : brainly.com/question/568302

\texttt{ }

<h3>Answer details</h3>

Grade: High School

Subject: Physics

Chapter: Kinematics

\texttt{ }

Keywords: Velocity , Driver , Car , Deceleration , Acceleration , Obstacle , Projectile , Motion , Horizontal , Vertical , Release , Point , Ball , Wall

You might be interested in
Use newton's method to find the second and third approximation of a root of
Nina [5.8K]
Please answer this question 

5 0
3 years ago
If a neutral metal comb is held near an object with a negative charge, the Como become charged by
LenKa [72]
The local charging of the comb is due to induction. The negative object's charge pushes electrons in the comb away from the side close to the charged object causing that part to be positively charged. Note that the comb's net charge is still zero provided it doesn't touch the object. When you move the comb away its electrons will redistribute.
4 0
3 years ago
Read 2 more answers
Atoms with a low ionization energy hold tight to their outer valence electrons.
Anestetic [448]
True would be the Correct answer
5 0
3 years ago
Read 2 more answers
In one of the original Doppler experiments, a tuba was played at a frequency of 64.0 Hz on a moving flat train car, and a second
wolverine [178]

Answer:

 f_{beat} = 1.64\ Hz

Explanation:

given,

frequency of tuba.f = 64 Hz

Speed of train approaching, v = 8.50 m/s

beat frequency = ?

using Doppler's effect formula

 f' = f(\dfrac{v}{v-v_s})

v_s is the velocity of the source

v is the speed of sound, v = 340 m/s

now,

 f' = 64\times (\dfrac{340}{340 - 8.50})

       f' = 65.64 Hz

now, beat frequency is equal to

 f_{beat} = f' - f

 f_{beat} = 65.64 - 64

 f_{beat} = 1.64\ Hz

hence, beat frequency is equal to 1.64 Hz

3 0
3 years ago
nan moved 18m to the right and then another 22m to the right if the motion takes 20 seconds what is nans velocity
IrinaVladis [17]
Step 1: list known info

distance(change in position (Δx))= 18m+22m= 40m
time= 20 seconds

Step 2 :solve for velocity

velocity= Δx÷time
v= 40/20= 2m/s

Answer: the velocity is 2 meters per a second (m/s)


7 0
3 years ago
Other questions:
  • What two organelles should be labeled that WOULD NOT be found in an animal cell?
    7·1 answer
  • normally a slower moving person would develop less power then a faster moving person. describe a situation in which a slower mov
    14·1 answer
  • As altitude increases, atmospheric pressure decreases, which means less oxygen is diffused into the blood from the lungs. for in
    8·2 answers
  • What are the three longest wavelengths for standing sound waves in a 121-cm-long tube that is (a) open at both ends and (b) open
    12·1 answer
  • In which type of chemical reaction is heat absorbed from the surroundings?
    12·2 answers
  • A hypothetical atom has three energy levels: the ground-state level and levels 1.50 eV and 5.00 eV above the ground state. What
    5·1 answer
  • A mechanic pushes perpendicularly on the end of a 0.15m wrench. If the
    10·1 answer
  • How much work is done when a 100 N force moves a block 59 m?
    5·1 answer
  • A car is being driven along a road at 25m/s when the driver suddenly notices that there is a fallen tree blocking the road 65m a
    11·1 answer
  • A 500kg car is driven forward with a thrust force of 1500N. Air resistance and friction acts against the motion of the car with
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!