Question

Problem: A rock is 100m above the ground. It is given an initial velocity of -1m/s...


Problem: A rock is 100m above the ground. It is given an initial velocity of -1m/s (downward). The acceleration due to gravity is -9.8 m/s. How far above the ground is it after three seconds?
0 0
Add a comment Improve this question Transcribed image text
Answer #1

displacement travelled by the rock in hmgiven time

d = ut + 0.5 gt^2

d = 1 * 3 + 0.5* 9.8* 3^2

d = 47.1 m

Distance above ground = 100 - 47.1 = 52.9 m

==========

Comment in case any doubt, will reply for sure.. Goodluck

Add a comment
Know the answer?
Add Answer to:
Problem: A rock is 100m above the ground. It is given an initial velocity of -1m/s...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

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
  • 1. If a projectile is fired with an initial velocity of vo meters per second at...

    If a projectile is fired with an initial velocity of v0 meters per second at an angle α above the horizontal, and air resistance is assumed to be negligible, then its position after t seconds is given by the parametric equationsx=(v0 cos α) t   y=(v0 sin α) t-1/2 g t2where g is the acceleration due to gravity (9.8 m / s2)(a) If a projectile is fired with α=45° and v0=900 m / s, when will it hit the ground? How...

  • If a projectile is fired with an initial velocity of vo meters per second at an...

    If a projectile is fired with an initial velocity of vo meters per second at an angle a above the horizontal and air resistance is assumed to be negligible, then its position after t seconds is given by the parametric equations x = (vo cos(a)t y = (vo sin(a)t - +- 1012 where g is the acceleration due to gravity (9.8 m/s2). (Round your answers to the nearest whole number.) (a) If a gun is fired with a = 30°...

  • A rock is thrown straight downward from a tree limb with an initial velocity v_0. The...

    A rock is thrown straight downward from a tree limb with an initial velocity v_0. The rock has constant downward acceleration of 10 m/s^2 during its fall. The rock moves 6 times as far during the first 4 seconds as during the first 1 second of tall. What is the value (magnitude only) of v_0?

  • Answer in units of m/s. Fo tic av 012 10.0 points An object is thrown vertically...

    Answer in units of m/s. Fo tic av 012 10.0 points An object is thrown vertically up and attains an upward velocity of 50 m/s when it reaches one fourth of its maximum height above its launch point. What was the initial speed of the object? The acceleration of gravity is 9.8 m/s. Answer in units of m/s 013 10.0 points A rock is thrown downward from an unknown height above the ground with an initial speed of 13 m/s....

  • A rock is thrown straight downward from a tree limb with an initial velocity v0. The...

    A rock is thrown straight downward from a tree limb with an initial velocity v0. The rock has constant downward acceleration of 10 m/s2 during its fall. The rock moves 9 times as far during the first 3 seconds as during the first 1 second of fall. What is the value (magnitude only) of v0?

  • when you throw a rock from a window 2m above ground with an initial velocity of...

    when you throw a rock from a window 2m above ground with an initial velocity of 10m/s find the the magnitude and angle of where it landed. please explain how to approach the problem and solve

  • A ball is thrown upwards with a speed of 19 m/s. it reaches a hight of 18.4 m above the point of release before it falls...

    A ball is thrown upwards with a speed of 19 m/s. it reaches a hight of 18.4 m above the point of release before it falls back down. Specify down as the positive direction and the initial position as the origin. If the balls position after three seconds is -12.9 meters, what is the distance traveled by the rock? The acceleration due to gravity is 9.8 m/s^2 down. The answer is 23.9 meters, how would i solve this?

  • A rock is thrown vertically upward with a speed of 19.0 m/s from the roof of a building that is 50.0 m above the ground. Assume free fall.

    Problem 7. A rock is thrown vertically upward with a speed of 19.0 m/s from the roof of a building that is 50.0 m above the ground. Assume free fall. 1. In how many seconds after being thrown does the rock strike the ground? 2. What is the speed of the rock just before it strikes the ground? 3. What is rock's position 2.00 seconds after the throw? 4. What is rock's velocity after its displacement of -20.0m?

  • On level ground a shell with an initial velocity of 31.0 m/s at 52.0 degree above...

    On level ground a shell with an initial velocity of 31.0 m/s at 52.0 degree above the horizontal and feels no appreciable air resistance. Find its maximum height above the ground. Express your answer using three significant figures. h_max = How far from its firing point does the shell land? Express your answer using three significant figures. t = At its highest point, find the horizontal and vertical components of its acceleration. Enter your answers numerically separated by a comma.

  • A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial...

    A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 13 m/s. 1) What is the initial speed of the ball? 2) What is the initial angle ? of the ball with respect to the ground? 3) What is the maximum height the ball goes above the ground? 4) How far from where it was kicked will the ball land? 5) What is the speed of the ball 0.8 seconds after...

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
Active Questions
ADVERTISEMENT