PHYSICS F/SCI.+ENGR.W/MODERN...-W/CODE
4th Edition
ISBN: 9780134641010
Author: Knight
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 5, Problem 53EAP
The leaf hopper, champion jumper of the insect world, can jump straight up at 4 m/s2. The jump itself last a mere 1 ms before the insect is clear of the ground.
a. Draw a free-body diagram of this mighty leaper while the jump is taking place.
b. While the jump is taking place, is the force of the ground on the leaf hopper greater than, less than, or equal to the force of gravity on the leaf hopper? Explain.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Your forehead can withstand a force of about 6.0 kN before fracturing, while your cheekbone can only withstand about 1.3 kN. a. If a 140 g baseball strikes your head at 30 m/s and stops in 0.0015 s, what is the magnitude of the ball’s acceleration? b. What is the magnitude of the force that stops the baseball? c. What force does the baseball apply to your head? Explain. d. Are you in danger of a fracture if the ball hits you in the forehead? In the cheek?
You walk into an elevator, step onto a scale, and push the "up" button. You recall that your normal weight is 565 N.
a. Draw a free-body diagram.
b. When the elevator has an upward acceleration of magnitude 2.90 m/s2, what does the scale read?
c. If you hold a 3.85 kg package by a light vertical string, what will be the tension in this string when the elevator accelerates as in the previous part?
A block with mass m = 7 kg is pushed with a force of = 50 N. Please answer F1 the following:
A. Draw a body diagram representing all forces acting on the block.
B. If the coefficient of static friction is = 0.4, does the block move?
C. The block now starts moving, if the coefficient of kinetic friction is =0.1 μk find .Fk
D. Find the acceleration.
E. After t = 3 s , how far did the block move? (the initial position and initial Xi velocity are both zero)Vi
F. What is the velocity at t= 3 s ?
Chapter 5 Solutions
PHYSICS F/SCI.+ENGR.W/MODERN...-W/CODE
Ch. 5 - An elevator suspended by a cable is descending at...Ch. 5 - A compressed spring is pushing a block across a...Ch. 5 - A brick is falling from the roof of a three-story...Ch. 5 - In FIGURE Q5.4 block B is falling and dragging...Ch. 5 - You toss a ball straight up in the air....Ch. 5 - A constant force applied to A causes A to...Ch. 5 - An object experiencing a constant force...Ch. 5 - An object experiencing a constant force...Ch. 5 - If an object is at rest, can you conclude that...Ch. 5 - If a force is exerted on an object, is it possible...
Ch. 5 - Is the statement “An object always moves in the...Ch. 5 - Prob. 12CQCh. 5 -
13. Is it possible for the friction force on an...Ch. 5 -
14. Suppose you press your physics book against...Ch. 5 - FIGURE Q5.15 shows a hollow tube forming...Ch. 5 - Prob. 16CQCh. 5 - Which of the following are inertial reference...Ch. 5 - Prob. 1EAPCh. 5 - Prob. 2EAPCh. 5 - A baseball player is sliding into second base....Ch. 5 - Prob. 4EAPCh. 5 -
5. An arrow has just been shot from a bow and is...Ch. 5 - Two rubber bands cause an object to accelerate...Ch. 5 - Two rubber bands pulling on an object cause it to...Ch. 5 - FIGURE EX5.8 shows acceleration-versus-force graph...Ch. 5 - Prob. 9EAPCh. 5 - Prob. 10EAPCh. 5 - Prob. 11EAPCh. 5 - FIGURE EX5.12 shows an acceleration-versus-force...Ch. 5 - Prob. 13EAPCh. 5 -
14. FIGURE EX5.14 shows the acceleration of...Ch. 5 - Prob. 15EAPCh. 5 - Prob. 16EAPCh. 5 - Prob. 17EAPCh. 5 - Exercise 17 trough 19 show two of the three forces...Ch. 5 - Exercise 17 trough 19 show two of the three forces...Ch. 5 - Prob. 20EAPCh. 5 - Prob. 21EAPCh. 5 - Prob. 22EAPCh. 5 - Exercise 23 through 27 describe a situation. For...Ch. 5 - Exercise 23 through 27 describe a situation. For...Ch. 5 -
Exercise 23 through 27 describe a situation. For...Ch. 5 -
Exercise 23 through 27 describe a situation. For...Ch. 5 - Exercise 23 through 27 describe a situation. For...Ch. 5 - Prob. 28EAPCh. 5 - Prob. 29EAPCh. 5 - Prob. 30EAPCh. 5 - Prob. 31EAPCh. 5 - A single force with x-component Fxacts on a 500 g...Ch. 5 - A constant force is applied to an object, causing...Ch. 5 - A constant force is applied to an object, causing...Ch. 5 - Problem 35 through 40 show a free-body diagram....Ch. 5 - through 40 show a free-body diagram. For each:...Ch. 5 - Prob. 37EAPCh. 5 - Prob. 38EAPCh. 5 - Problem 35 through 40 show a free-body diagram....Ch. 5 - Problem 35 through 40 show a free-body diagram....Ch. 5 - In lab, you propel a cart with four known forces...Ch. 5 - Problems 42 through 52 describe a situation. For...Ch. 5 - Problems 42 through 52 describe a situation. For...Ch. 5 - Problems 42 through 52 describe a situation. For...Ch. 5 - Problems 42 through 52 describe a situation. For...Ch. 5 - Problems 42 through 52 describe a situation. For...Ch. 5 - Problems 42 through 52 describe a situation. For...Ch. 5 - Problems 42 through 52 describe a situation. For...Ch. 5 - Problems 42 through 52 describe a situation. For...Ch. 5 - Problems 42 through 52 describe a situation. For...Ch. 5 - Problems 42 through 52 describe a situation. For...Ch. 5 - Problems 42 through 52 describe a situation. For...Ch. 5 - The leaf hopper, champion jumper of the insect...Ch. 5 - Prob. 54EAPCh. 5 -
55. A heavy boxy is in the back of a truck. The...Ch. 5 - If a car stops suddenly, you feel “thrown...Ch. 5 - Prob. 57EAP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A ball hanging from a light string or rod can be used as an accelerometer (a device that measures acceleration) as shown in Figure P5.18. What force causes the deflection of the ball? Is the cart in the lower part of the photo an inertial reference frame? How can the balls deflection be used to find the carts acceleration? In which direction is the cart accelerating? Explain your answers.arrow_forward(a) A cat with a mass of 850 kg in moving to the right with a constant speed of 1.44 m/s. What is the total force on the cat ? (b) What is the total force on the cat if it is moving to the left?arrow_forwardQ5: A waiter pushes a glass over the counter toward his customer at an initial speed of 5.5 m/s. Two metersahead, the customer picks up the glass at the end of the counter, which has now lost 40% of its velocity.(a) Draw the free-body diagram for the glass and determine the acceleration of the glass as it slides over the counter,assumed to be constant?(b) What is the coefficient of kinetic friction between the counter and the glass?(c) If the customer was distracted and did not pick up the glass, how far from the base of the counter, 90 cm high, would the glassfall?(d) Conceptual Discussion - Discuss what would happen to the answer in (c) if there were no friction.arrow_forward
- The fastest pitched baseball was clocked at 47 m/s. If the pitcher exerted his force (assumed to be horizontal and constant) over a distance of 1.0 m, and a baseball has a mass of 145 g, a. Draw a free-body diagram of the ball during the pitch. b. What force did the pitcher exert on the ball during this record-setting pitch? c. Estimate the force in part b as a fraction of the pitcher’s weight.arrow_forwardA 1000 kg car pushes a 2000 kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push backward against the ground with a force of 4500 N. a. What is the magnitude of the force of the car on the truck? b. What is the magnitude of the force of the truck on the car?arrow_forwardA contestant in a winter games event pushes a 37.0-kg block of ice across a frozen lake with a force of 25 N at 22.0° below the horizontal as shown in Figure (a) below, and it moves with an acceleration of 0.630 m/s2 to the right. (a) What is the normal force exerted by the lake surface on the block of ice?_______N (b) Instead of pushing on the block of ice, the contestant now pulls on it with a rope at the same angle above the horizontal as in part (a), and with the same magnitude of force. See Figure (b) above. Now what is the normal force exerted by the lake surface on the block of ice?_______Narrow_forward
- A 7700-kg helicopter accelerates upward at 0.60 m/s2 while lifting a 1250-kg frame at a construction site. Part A What is the lift force exerted by the air on the helicopter rotors? Express your answer using two significant figures. Part B What is the tension in the cable (ignore its mass) that connects the frame to the helicopter? Express your answer using two significant figures. Part C What force does the cable exert on the helicopter? (Figure 1) Express your answer using two significant figures.arrow_forwardEXPLANATION MUST BE TYPED - CANNOT BE HAND-WRITTEN On vacation, your 1400-kg car pulls a 560-kg trailer away from a stoplight with an acceleration of 1.85 m/s2. (a) What is the net force exerted on the trailer? (b) What force does the trailer exert on the car? (c) What is the net force acting on the car?arrow_forwardA 22 riffle bullet, traveling at 360 m/s, strikes a block of softwood which it penetrates to a depth of 0.1 m. The mass of the bullet is 1.8 g. Assume a constant retarding force.a) How much time was required for the bullet to stop?b) What was the accelerating force, in newtons? In poundsarrow_forward
- Two children pull on a sled in opposite directions, each pulling with a force of 11 N. a) What is the net force acting on the sled? b) Which Newton's Law did you use in the previous queston? c) What is the acceleration of the sled? d) What is the velocity of the sled?arrow_forwardImagine holding a 25kg dumbbell in your hand. a) What force must you exert on the dumbbell to hold it still? b) What force must you exert on the dumbbell to keep it moving upward at constant velocity?arrow_forwardMr. Vollmayer pulls his children (21kg and 24kg) on a sled (5kg). The force of friction on the sled is 60N and he pulls horizontally with 65N. a. What is the normal force on the sled?b. What is the acceleration of the sled?c. How fast will they be moving in 60s if they started from rest?d. How far will they go in this time?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
University Physics Volume 1
Physics
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:OpenStax - Rice University
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Drawing Free-Body Diagrams With Examples; Author: The Physics Classroom;https://www.youtube.com/watch?v=3rZR7FSSidc;License: Standard Youtube License