During the construction of a high-rise building, a worker accidently dropped his portable electric screwdriver from a height of 400 feet. After t seconds, the screwdriver had fallen a distance of s = 16t² feet. How long did it take the screwdriver to reach the ground? The answer for part a is 5. b. What was the average velocity of the screwdriver between the time it was dropped and the time it hit the ground? The answer for part b is -80. What was the velocity of the screwdriver at the time it hit the ground? The answer is а. с. -160.

During the construction of a high-rise building, a worker accidently dropped his portable electric screwdriver from a height of 400 feet. After t seconds, the screwdriver had fallen a distance of s = 16t² feet. How long did it take the screwdriver to reach the ground? The answer for part a is 5. b. What was the average velocity of the screwdriver between the time it was dropped and the time it hit the ground? The answer for part b is -80. What was the velocity of the screwdriver at the time it hit the ground? The answer is а. с. -160.

Name: During the construction of a high-rise building, a worker accidently
Uploaded: 2024-03-05T11:56:34.000Z
Channel: Bartleby
Description: During the construction of a high-rise building, a worker accidently dropped his portable electricscrewdriver from a height of 400 feet. After t seconds, the screwdriver had fallen a distance ofs = 16t² feet.How long did it take the screwdriver to r

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter2: One Dimensional Motion

Section: Chapter Questions

Problem 2PQ: An animals tracks are frozen in the snow (Fig. P2.2). Can these tracks be used to make a motion...

See similar textbooks

Similar questions

While running a marathon, a long-distance runner uses a stopwatch to time herself over a distance of 100 m. She finds that she runs this distance in 18 s. Answer the following by considering ratios, without computing her velocity.a. If she maintains her speed, how much time will it take her to run the next 400 m?b. How long will it take her to run a mile at this speed?
A body moves in a straight line according to this equation of motion: s(t) = 10+2 4t + 8, where t is measured in seconds and s in meters. a. What is its position at the end of 5 sec? b. What is the equation for its velocity v at any time t? c. What is its velocity v at the end of 5 seconds? d. What is the equation for its acceleration a at any time t? e. What is its acceleration at the end of 5 seconds?
Part A.) What is the final velocity, in meters per second, of a freight train that accelerates at a rate of 0.095 m/s2 for 8.75 min, starting with an initial velocity of 3.8 m/s? Part B.) If the train can slow down at a rate of 0.575 m/s2, how long, in seconds, does it take to come to a stop from this velocity? Part C.) How far, in meters, does the train travel during the process described in part (A)? Part D.) How far, in meters, does the train travel during the process described in part (B)?
You throw an object up with an initial velocity of voy=13 m/s from a height of y=25 m. Part a) How long, in seconds, does it take for the object to reach the ground? Part b) What is the object's final velocity, in meters per second, as it impacts the ground? Part c) Find the time, in seconds, if you instead threw the object down with the same velocity, voy?
A commuter backs her car out of her garage with a constant acceleration of 1.60 m/s2. (For each answer, enter a number.) (a) How long in seconds does it take her to reach a speed of 2.00 m/s? (b) If she then brakes to a stop in 0.8 s, what is her (constant) deceleration in m/s2?
An advertisement for the newest model of a Mercedes sports claims the car can go from 0 to 60 miles per hour (mph) in just 3.3 seconds! a) How many meters per second (m/s) is 60 mph? b) In m/s 2 (sometimes written as m/s/s also, just so you know), what is the supposed acceleration of the sports car? c) Impressed by this claim, Sherry buys one. She hops into her new Mercedes sports car and steps on the gas. She’s an engineer and did the math later on; she discovered that her car’s acceleration is 6.7 m/s2 . i) Is her car’s acceleration faster or slower than the advertisement claims it should be? ii) In seconds, how long did it actually take for Sherry’s car to reach 60 mph
A student drives the 105-mi trip back to campus after spring break and travels with an average speed of 63 mi/h for 1 hour and 30 minutes for the first part of the trip. (a) What distance was traveled during this time? Answer: 94.5 mi (b) Traffic gets heavier, and the last part of the trip takes another half-hour. What was the average speed during this leg of the trip? (c) Find the average speed for the total trip.
You're checking your car's speedometer. With cruise control engaged, the speedometer reads a constant 60mi/h. (a) Using highway mileposts, you clock 4 min,45 s to go 5 m. If the mileposts are accurate, what's the error in your speedometer reading? (b) How much time should you take to cover each mile if your true speed is 65mi/h?
An object is moving in the air (defying gravity) so that its height after t seconds is given by ℎ(t)=18sin(t)cos(t)+8t meters. (If you graph this function, you can see it's moving up and down, but going higher and higher as time goes on.) a) At what time, t, does the object first change direction from going up to going down? b) What is the acceleration (m/s^2) of the object at that same time?
Light travels at a speed of about 3 x 108 m/s. (a) How manymiles does a pulse of light travel in a time interval of 0.1 s,which is about the blink of an eye? (b) Compare this distanceto the diameter of Earth.
A car goes 78 m to the righty and then 22 m to the left. It makes this trip on 35 seconds. a. What is the displacement in meters? b. What is the total distance travelled in meters? c. What is the average velocity? d. What is the average speed in m/s?
A cheetah can accelerate from rest to 25.0 m>s in 6.22 s.Assuming constant acceleration, (a) how far has the cheetah run inthis time? (b) After sprinting for just 3.11 s, is the cheetah’s speed12.5 m>s, greater than 12.5 m>s, or less than 12.5 m>s? Explain.(c) What is the cheetah’s average speed for the first 3.11 s of itssprint? For the second 3.11 s of its sprint? (d) Calculate the distancecovered by the cheetah in the first 3.11 s and the second 3.11 s.