Question
Asked Nov 20, 2019
46 views

A brick is thrown upward from the top of a building at an angle of 30° to the horizontal and with an initial speed of 15 m/s. If the brick is in flight for 3.3 s, how tall is the building? 

 

check_circle

Expert Answer

Step 1

Let the brick be projected at an angle θ from the horizontal from the top of the building.

Let the horizontal component of the launch velocity be denoted by vox and the vertical component of the launch velocity be denoted by voy

The two velocity components are represented as ,

 

help_outline

Image Transcriptionclose

Vox =v cose = vsin e ох Voy

fullscreen
Step 2

Let the height of the building be denoted by h.

This height can be calculated in terms of the vertical motion of the brick.

Using the second kinematic equation, the height h can be computed as,

Also for the vertical motion of the brick

help_outline

Image Transcriptionclose

-g

fullscreen
Step 3

Use the above substitution in the secon...

help_outline

Image Transcriptionclose

h=voy+ 2 1 (vsin0)t

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Physics

Related Physics Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: (a) If the legendary apple of Newton could be released from rest at a height of 2.5 m from the surfa...

A: Write the formula for the gravitational potential energy.

question_answer

Q: A rocket takes off from Earth's surface, accelerating straight up at 55.2 m/s2. Calculate the normal...

A: Write the equation for net force

question_answer

Q: A block of mass 2.00 kg is placed against a horizontal spring of constant k = 775 N/m and pushed so ...

A: (a) the elastic potential energy is given by,

question_answer

Q: Infared light has a lower frequency than visible light.  What is the frequency of IR light that has ...

A: Given:Wavelength of IR light, λ = 680 nmVelocity of light, c = 3 X 108 m/s

question_answer

Q: Ch 24, problem 44 The drawing shows light incident on a polarizer whose transmission axis is paralle...

A: Since we are entitled to answer up to 3 sub-parts, we’ll answer the first 3 as you have not mentione...

question_answer

Q: A 0.771 kg sample of lead is in its solid state at a temperature of 294.6 C. How much energy is requ...

A: Consider the lead of mass m having latent heat of fusion Lf.

question_answer

Q: How much work does gravity do on a 0.190-kg ball falling from a height of 15.0 m? (Neglect air resis...

A: Consider the mass of the ball be m, the weight of the ball be w, and height or distance of the ball ...

question_answer

Q: In an experiment using an inclined track with a dynamics cart, the computer failed, and the student ...

A: Write the equation of motion

question_answer

Q: Question 1 2 and 3

A: Given:Mass of hollow sphere = 4 kgRadius of hollow sphere = 30 cm. = 0.3 mInclined angle θ = 37ᶱ