HomeworkLib
Question

A ball is thrown straight downward from the top of a building. Its initial velocity is...

A ball is thrown straight downward from the top of a building. Its initial velocity is 12 m/s downward. It hits the ground 1.2s after release. How tall is the building? *ignoring any air resistance*

Please explain in detail why you need to solve for vf first using Vf=Vo+at and then plug Vf into Vf^2=Vo^2+2a(x2-x1)

I assumed that since the ball hits the ground that vf=0m/s  but using that I am getting the incorrect answer of 7.3m instead of the correct answer of 21.5m.

from the problem I set: Vo=12m/s Vf=0 a=9.8m/s t=`1.2s   d=?m

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
A ball is thrown straight downward from the top of a building. Its initial velocity is...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 15. A ball is thrown down from the top of a building with an initial velocity...

    15. A ball is thrown down from the top of a building with an initial velocity of 25 m / s. If it hits the ground after 2.0 s. How tall is the building, assuming air resistance is not considered?

  • PROBLEM: A ball is thrown downward from the top of a building at an angle of...

    PROBLEM: A ball is thrown downward from the top of a building at an angle of 30.0° below the horizontal. The point of release is 49.0 m above the ground and the ball lands 67.7 m from the base of the building. (a) How long does it take for the ball to hit the ground? (b) Find the ball's initial speed. (c) the speed and angle of the velocity vector with respect to the horizontal at impact. Neglect air resistance.

  • A ball is thrown horizontally with an initial speed of 30m/s from the top of a...

    A ball is thrown horizontally with an initial speed of 30m/s from the top of a building 45m tall. a. How far away from the building will the ball hit the ground? b. What is the horizontal component of its velocity when it hits the ground? c. Find the magnitude and direction of the velocity when it hits the ground?

  • A ball is thrown from the top of a building with an initial velocity of 23.7...

    A ball is thrown from the top of a building with an initial velocity of 23.7 m/s straight upward, at an initial height of 52.0 m above the ground. The ball just misses the edge of the roof on its way down, as shown in the figure. (a) Determine the time needed for the ball to reach its maximum height. s (b) Determine the maximum height. m (c) Determine the time needed for the ball to return to the height...

  • Explore A baseball is thrown from the top of a tall building with an initial velocity...

    Explore A baseball is thrown from the top of a tall building with an initial velocity of 10 m/s from a height of h= 11.5 m above the ground. Find its speed when it reaches the ground (a) if its launch angle is 37°, and (b) if it is launched horizontally. Conceptualize As the baseball moves upward and to the right, the force of gravity accelerates it downward. The vertical component of its velocity decreases in magnitude until the baseball...

  • A ball is thrown off the top of a 300m tall building with a velocity of...

    A ball is thrown off the top of a 300m tall building with a velocity of 50m/s at an angle of 20 degrees below the horizontal. How far does the ball travel horizontally before hitting the ground?

  • A ball is thrown upward from the top of a building at an angle of 30.0°...

    A ball is thrown upward from the top of a building at an angle of 30.0° to the horizontal and with an initial speed of 22.0 m/s. The point of release is h = 43.0 m above the ground. (a) How long does it take for the ball to hit the ground? (b) Find the ball's speed at impact. (c) Find the horizontal range of the ball

  • A ball is thrown straight up from the edge of the roof of a building. A...

    A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof a time of 1.14 s later. You may ignore air resistance. Part A If the height of the building is 21.0 m, what must the initial speed be of the first ball if both are to hit the ground at the same time? m/s Submit Request Answer Incorrect; Try Again; 3 attempts remaining Part B Consider the...

  • A ball is thrown horizontally from the top of a 55.0-m building and lands 106.8 m...

    A ball is thrown horizontally from the top of a 55.0-m building and lands 106.8 m from the base of the building. Ignore air resistance. (Assume the ball is thrown in the +x direction and upward to be in the +y direction.) How long (in s) is the ball in the air? s (b) What must have been the initial horizontal component of the velocity (in m/s)? (Indicate the direction with the sign of your answer.) m/s (c) What is...

  • A ball is thrown horizontally from the top of a 61.5-m building and lands 112.8 m...

    A ball is thrown horizontally from the top of a 61.5-m building and lands 112.8 m from the base of the building. Ignore air resistance. (Assume the ball is thrown in the +x direction and upward to be in the +y direction.) (a) How long (in s) is the ball in the air? s (b) What must have been the initial horizontal component of the velocity (in m/s)? (Indicate the direction with the sign of your answer.) m/s (c) What...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT