Concept explainers
A small piece of paper is dropped and flutters to the floor. Is the piece of paper accelerating at any time during this motion? Explain.
Whether the piece of paper is accelerating at any time of the motion.
Answer to Problem 1CQ
The piece of paper is accelerating at all point of the time during its motion.
Explanation of Solution
The rate of change of velocity is called acceleration. Acceleration is a vector quantity, which contains both magnitude and direction.
When a piece of paper is dropped the initial velocity of the paper is zero. This is because the paper starts from rest. As the paper falls the gravity acts on the paper and the paper gets accelerated. Due to the presence of air resistance, the downward motion of the paper is not smooth and it begins to flutter. Fluttering is also indicates acceleration of the paper. Thus, the velocity of the falling paper changes and hence the paper attains the acceleration.
Conclusion:
Therefore, the piece of paper is accelerating at all point of the time during its motion.
Want to see more full solutions like this?
Chapter 3 Solutions
Physics of Everyday Phenomena
- A glider on an air track carries a flag of length through a stationary photogate, which measures the time interval td during which the flag blocks a beam of infrared light passing across the photogate. The ratio vd = /td is the average velocity of the glider over this part of its motion. Suppose the glider moves with constant acceleration, (a) Is vd necessarily equal to the instantaneous velocity of the glider when it is halfway through the photogate in space? Explain. (b) Is vd equal to the instantaneous velocity of the glider when it is halfway through the photogate in time? Explain.arrow_forwardA seagull flies at a velocity of 9.00 m/s straight into the wind. (a) If it takes the bird 20.0 min to travel 6.00 km relative to the Earth, what is the velocity of the wind? (b) If the bird turns around and flies with the wind, how long will he take to return 6.00 km? (c) Discuss how the wind affects the total round-trip time compared to what it would be with no wind.arrow_forwardAn ice sled powered by a rocket engine sum from rest on a large frozen lake and accelerates at + 40 ft/s2. After some time t1, the rocket engine is shut down and the sled moves with constant velocity v for a time t2. If the total distance traveled by the sled is 17 500 ft and the total time is 90 s. find (a) the times t1 and t2 and (b) the velocity v. At the 17 500-ft mark, the sled begins to accelerate at 20 ft/s2. (c) What is the final position of the sled when it comes to rest? (d) How long does it take to come to rest?arrow_forward
- An astronaut on the surface of the Moon fires a cannon to launch an experiment package, which leaves the barrel moving horizontally. Assume the free-fall acceleration on the Moon is one-sixth of that on the Earth. (a) What must the muzzle speed of the package be so that it travels completely around the Moon and returns to its original location? (b) What time interval does this trip around the Moon require?arrow_forwardA player holds two baseballs a height h above the ground. He throws one ball vertically upward at speed v0 and the other vertically downward at the same speed. Calculate (a) the speed of each ball as it hits the ground and (b) the difference between their times of flight.arrow_forwardA hard rubber ball, released at chest height, falls to the pavement and bounces back to nearly the same height. When it is in contact with the pavement, the lower side of the ball is temporarily f fattened. Suppose the maximum depth of the dent is on the order of 1 cm. Find the order of magnitude of the maximum acceleration of the ball while it is in contact with the pavement. State your assumptions, the quantities you estimate, and the values you estimate for them.arrow_forward
- Carla holds a ball 1.5 m above the ground. Daniel, leaning out of a car window, also holds a ball 1.5 m above the ground. Daniel drives past Carla at 40 mph and, just as he passes her, both release their balls at the same instant. Whose ball hits the ground first? Explain.arrow_forwardSuppose you hold a Ping-Pong ball and a golf ball at arm’s length and drop them simultaneously. You’ll see them hit the floor at about the same time. But, if you drop them off the top of a high ladder, you’ll see the golf ball hit first. Explain.arrow_forwardTwo balls are thrown from a Keane Hall. One is thrown directly down and the other directly up. Both balls have the same initial speed (just different direction) and both hit the ground below. How does the speed of the two balls relate when they hit the ground? Explain.arrow_forward
- 2. A student wants to toss a textbook to his roomate who is leaning out of a window directly above him. He throws the book upwards with an initial velocity of 8.0 m/s. The roomate catches it while it is travelling at 3.0 m/s upward. A. How long was the book in the air? B. How far vertically did the book travel? C. Redo the problem, and have the roomate catch the book as it is travelling 3.0 m/s downward. What is the time and displacement now? 3. A man is standing on the edge of a 20.0 m high cliff. He throws a rock vertically with an initial velocity of 10.0 m/s A. How high does the rock go? (Remember that at its max height v = 0 m/s) B. How long does it take to reach it max height?arrow_forwardDriving down the highway, you find yourself behind a heavilyloaded tomato truck. You follow close behind the truck, keeping the same speed. Suddenly a tomato falls from the back of thetruck. Will the tomato hit your car or land on the road, assuming you continue moving with the same speed and direction?Explain.arrow_forward2. A stone and a feather, both from rest, are dropped together at the same time and fall freely inside a vacuum tube (completely no air inside). Is it possible for the stone to reach the ground first before the feather? Explain your answer.arrow_forward
- College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax CollegeGlencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning