ZuoTi.Pro
Question

A 2D Kinematics Question

A rock is thrown horizontally off of a cliff. It starts with a velocity of 4.2 m/s and the cliff is  68.2 m high. How long does the rock fall? Use the equation  Δy = 1/2 a Δt^2 +Voy Δt

physics   Kinematics   2D-Kinematics   
1 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

we know, Δy = 1/2 a Δt^2 +Voy Δt

so,

68.2 = 1/2*10*t^2

t = 3.7sec


answered by: longline
1 0
Add a comment
Know the answer?
Add Answer to:
A 2D Kinematics Question
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

  • A rock is thrown off a cliff at an angle of 51° above the horizontal. The cliff is 130 m...

    A rock is thrown off a cliff at an angle of 51° above the horizontal. The cliff is 130 m high. The initial speed of the rock is 20 m/s. (Assume the height of the thrower is negligible.) (a) How high above the edge of the cliff does the rock rise (in m)?   (b) How far has it moved horizontally when it is at maximum altitude (in m)?   (c) How long after the release does it hit the ground (in s)?   (d) What is...

  • Question 1 (1 point) A rock is thrown horizontally with a speed of 75 m/s from...

    Question 1 (1 point) A rock is thrown horizontally with a speed of 75 m/s from a cliff top 119 m high. How long will it take to hit the ground? Your Answer: Answer

  • Homework 9 Name Hour 1.) A cat stretches and knocks a pen horizontally off a 1.1...

    Homework 9 Name Hour 1.) A cat stretches and knocks a pen horizontally off a 1.1 m tall desk. If the pen ands 35 cm from the edge of the desk: a.) How long does it take the pen to hit the ground? b.) What horizontal velocity does the cat push the pen with? s and ently tacce the p 2.) You run and jump off a short cliff into a lake. If you jump with a velocity of 4...

  • A rock Is thrown horizontally with a speed of 17 m/s from a vertical cliff of...

    A rock Is thrown horizontally with a speed of 17 m/s from a vertical cliff of helght 31 m (a) How long does it take to reach the horizontal ground below? 2.515 (b) How far wll It land from the base of the cllff? 42.759 (c) What is the velocity (magnitude and direction counterclockwise from the +x-axis, which is the initial horizontal direction in which the rock was thrown) of the rock just before it hits the ground? Magnitude 29...

  • A stone is thrown horizontally at a speed of 5.0 m/s from the top of a...

    A stone is thrown horizontally at a speed of 5.0 m/s from the top of a cliff 79.3 m high. (a) How long does it take the stone to reach the bottom of the cliff? (b) How far from the base of the cliff does the stone hit the ground? (c) What are the horizontal and vertical components of the stone's velocity just before it hits the ground? m/s (vertical) m/s (horizontal)

  • PLEASE EXPLAIN BOTH QUESTION STEP BY STEP. THANK YOU SO MUCH. Time in air Five balls...

    PLEASE EXPLAIN BOTH QUESTION STEP BY STEP. THANK YOU SO MUCH. Time in air Five balls are all at the same height near the surface of Earth. One is dropped from rest but the others are launched horizontally. Using the information given in the table below, state how long it will take for each ball to fall to the ground after being launched. Ignore air drag. Ball 1 Ball 2 Ball 3 Ball 4 Ball 5 0.2 18 (m/s) At...

  • 4) A stone is thrown horizontally off a cliff. The cliff is 120 m high and...

    4) A stone is thrown horizontally off a cliff. The cliff is 120 m high and the stone is given a speed of 30 m/s. a) How long will it take the stone to reach the ground? b) How far away from the cliff will it land?

  • Can I get these questions answered please :D. Question 1 1 pts A ball is thrown...

    Can I get these questions answered please :D. Question 1 1 pts A ball is thrown off of a 38 m cliff and lands 26 away. How long was the ball in the air? Use-9.8 m/s2, round answer to the hundredth place, and DO NOT include units. Question 2 1 pts A student throws an apple out of the window with a horizontal velocity of 3.8 m/s and it lands 5.63 m away. How long was the apple in the...

  • a stone is thrown horizontally at a speed of 5

    a stone is thrown horizontally at a speed of 5.o m/s from the top of a cliff 78.4 m high. How long does it take the stone to reach the bottom of the cliff?

  • QUESTION 5 Alice and Tom dive from an overhand into the lake below. Tom simply drops...

    QUESTION 5 Alice and Tom dive from an overhand into the lake below. Tom simply drops straight down from the edge, but Alice gets a running start and dives horizontally with an initial speed of 25 m/s. Neither experiences significant air resistance. Which of the following is true about their speeds when they each hit the water? O They will have the same speed. Alice's speed is greater than Tom's OAlice's speed will be exactly 9.8 m/s less than Tom's...

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
ADVERTISEMENT