Question

A rock is dropped from a tall building. The rock's displacement in the last second before...

A rock is dropped from a tall building. The rock's displacement in the last second before hit the ground is 30.0 m. How tall is the building?
Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Acceleration due to gravity, g = 9.8 m/s^2

The distance travelled by the rock in ' t ' seconds is ,

The distance travelled by the rock in ' t - 1' seconds is ,

Distance travelled in last second,


Substituting t = 3.56 s in Eqn (1)

​​​​​​​

0 0
Know the answer?
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
Similar Questions
A rock is dropped from a tall building. The rock's displacement in the last second before...
A rock is dropped from a tall building. The rock's displacement in the last second before hit the ground is 32.0 m. How tall is the building?
A rock is dropped from the top of a tall building. The rock's displacement in the...
A rock is dropped from the top of a tall building. The rock's displacement in the last second before it hits the ground is 40 %% of the entire distance it falls. How tall is the building?
A rock is dropped (from rest) from the top of a 20.8-m-tall building. How far above...
A rock is dropped (from rest) from the top of a 20.8-m-tall building. How far above the ground is the rock 1.2 s before it reaches the ground?
A man stands on the roof of a 19.0 mm -tall building and throws a rock...
A man stands on the roof of a 19.0 mm -tall building and throws a rock with a velocity of magnitude 30.0 m/sm/s at an angle of 42.0 ∘∘ above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof reached by the rock. Calculate the magnitude of the velocity of the rock just before it strikes the ground. Calculate the horizontal distance from the base of the building to the point where the rock strikes...
A rock is launched from the top of a building 50 m high at an angle...
A rock is launched from the top of a building 50 m high at an angle of 30o with a speed of 20 m/s. (a) How far from the building does the rock land? (b) What is the rock's maximum altitude as measured from the ground? (c) What is the velocity of the rock just before landing?
A rock is projected from the edge of the top of a building with an initial...
A rock is projected from the edge of the top of a building with an initial velocity of 12.2 m/s at an angle of 53° below the horizontal. The rock strikes the ground a horizontal distance of 25 m from the base of the building. Assume that the ground is level and that the side of the building is vertical. How tall is the building?
A rock is held steady over a cliff and dropped. 2.4 seconds later, another rock is...
A rock is held steady over a cliff and dropped. 2.4 seconds later, another rock is thrown straight down at a speed of 7.1 m/s, and hits the first rock. How far have the rocks dropped before they collide? How long is the first rock in the air before it gets hit by the second rock?
A 3.9 kg book is dropped from rest over the edge of a 40 m tall...
A 3.9 kg book is dropped from rest over the edge of a 40 m tall building. What is the gravitational potential energy of the book at the top of the building? How long does it take to reach the ground? What is its final velocity just before it hits the ground?
A rock is thrown upward from the hand at an initial speed of 4.5 m/s. How...
A rock is thrown upward from the hand at an initial speed of 4.5 m/s. How much later must a second rock be dropped from the same initial height of 50 cm so that the two rocks hit the ground at the same time?
A rock is dropped, from rest, from a height of 8.9 m above the ground at...
A rock is dropped, from rest, from a height of 8.9 m above the ground at t = 0 s. At the same time that the rock is dropped a stone is thrown upward from a height of 1.1 m above the ground at a speed of 7.1 m/s. The stone travels straight upward toward the rock. There is no air resistance. a. Determine the height above the ground where the rock hits with the stone. Blank 1. Calculate the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT