COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 2, Problem 20QAP
To determine
Which ball hits the ground first
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Two PHY11X classmates are standing on top of the Carlton Centre. One classmate is standing at the edge of a building and throws one ball straight up while the other classmate throws the other ball straight down at the same initial speed. Neglecting air resistance, the ball to hit the ground below the building with the greater speed will be
A. the one thrown downward.
B. impossible to determine with given information.
C. neither -- they will both hit with the same speed.
D. the one thrown upward.
A not so muscular student throws a golf-ball only 60 meters high and it then falls the same distance back into his hand. What was the TOTAL time that the golf-ball was in the air
A. about 10 seconds.
B. about 5 seconds.
C. more than 20 seconds.
D. about 15 seconds.
What would happen to the motion of the projectile if we do not ignore air resistance? Select all that apply.
A. The object would move in a straight line.
B. The range would be a shorter distance.
C. It is impossible to think about what would happen to the object.
D. The object would not fall to the ground.
Chapter 2 Solutions
COLLEGE PHYSICS
Ch. 2 - Prob. 1QAPCh. 2 - Prob. 2QAPCh. 2 - Prob. 3QAPCh. 2 - Prob. 4QAPCh. 2 - Prob. 5QAPCh. 2 - Prob. 6QAPCh. 2 - Prob. 7QAPCh. 2 - Prob. 8QAPCh. 2 - Prob. 9QAPCh. 2 - Prob. 10QAP
Ch. 2 - Prob. 11QAPCh. 2 - Prob. 12QAPCh. 2 - Prob. 13QAPCh. 2 - Prob. 14QAPCh. 2 - Prob. 15QAPCh. 2 - Prob. 16QAPCh. 2 - Prob. 17QAPCh. 2 - Prob. 18QAPCh. 2 - Prob. 19QAPCh. 2 - Prob. 20QAPCh. 2 - Prob. 21QAPCh. 2 - Prob. 22QAPCh. 2 - Prob. 23QAPCh. 2 - Prob. 24QAPCh. 2 - Prob. 25QAPCh. 2 - Prob. 26QAPCh. 2 - Prob. 27QAPCh. 2 - Prob. 28QAPCh. 2 - Prob. 29QAPCh. 2 - Prob. 30QAPCh. 2 - Prob. 31QAPCh. 2 - Prob. 32QAPCh. 2 - Prob. 33QAPCh. 2 - Prob. 34QAPCh. 2 - Prob. 35QAPCh. 2 - Prob. 36QAPCh. 2 - Prob. 37QAPCh. 2 - Prob. 38QAPCh. 2 - Prob. 39QAPCh. 2 - Prob. 40QAPCh. 2 - Prob. 41QAPCh. 2 - Prob. 42QAPCh. 2 - Prob. 43QAPCh. 2 - Prob. 44QAPCh. 2 - Prob. 45QAPCh. 2 - Prob. 46QAPCh. 2 - Prob. 47QAPCh. 2 - Prob. 48QAPCh. 2 - Prob. 49QAPCh. 2 - Prob. 50QAPCh. 2 - Prob. 51QAPCh. 2 - Prob. 52QAPCh. 2 - Prob. 53QAPCh. 2 - Prob. 54QAPCh. 2 - Prob. 55QAPCh. 2 - Prob. 56QAPCh. 2 - Prob. 57QAPCh. 2 - Prob. 58QAPCh. 2 - Prob. 59QAPCh. 2 - Prob. 60QAPCh. 2 - Prob. 61QAPCh. 2 - Prob. 62QAPCh. 2 - Prob. 63QAPCh. 2 - Prob. 64QAPCh. 2 - Prob. 65QAPCh. 2 - Prob. 66QAPCh. 2 - Prob. 67QAPCh. 2 - Prob. 68QAPCh. 2 - Prob. 69QAPCh. 2 - Prob. 70QAPCh. 2 - Prob. 71QAPCh. 2 - Prob. 72QAPCh. 2 - Prob. 73QAPCh. 2 - Prob. 74QAPCh. 2 - Prob. 75QAPCh. 2 - Prob. 76QAPCh. 2 - Prob. 77QAPCh. 2 - Prob. 78QAPCh. 2 - Prob. 79QAPCh. 2 - Prob. 80QAPCh. 2 - Prob. 81QAPCh. 2 - Prob. 82QAP
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- A student throws a heavy red ball horizontally from a balcony of a tall building with an initial speed i. At the same time, a second student drops a lighter blue ball from the balcony. Neglecting air resistance, which statement is true? (a) The blue ball reaches the ground first. (b) The balls reach the ground at the same instant. (c) The red ball reaches the ground first. (d) Both balls hit the ground with the same speed. (e) None of statements (a) through (d) is true.arrow_forwardA student throws a heavy red ball horizontally from a balcony of a tall building with an initial speed v0. At the same time, a second student drops a lighter blue ball from the same balcony. Neglecting air resistance, which statement is true? (a) The blue ball reaches the ground first, (b) The balls reach the ground at the same instant, (c) The red ball reaches the ground first, (d) Both balls hit the ground with the same speed, (e) None of statements(a) through(d) is true.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_forward
- The driver of a truck slams on the brakes when he sees a tree blocking the road. The truck slows down uniformly with an acceleration of 5.60 m/s2 for 4.20 s. making skid marks 62.4 m long that end at the tree. With what speed does the truck then strike the tree?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_forwardA fisherman sets out upstream on a river. His small boat, powered by an outboard motor, travels at a constant speed v in still water. The water (Urns at a lower constant speed vw. The fisherman has traveled upstream for 2.00 km when his ice chest falls out of the boat. He notices that the chest is missing only after he has gone upstream for another 15.0 min. At that point, he turns around and heads back downstream, all the time traveling at the same speed relative to the water. He catches up with the floating ice chest just as he returns to his starting point. How last is the river flowing? Solve this problem in two ways. (a) First, use the Earth as a reference frame. With respect to the Earth, the boat travels upstream at speed v vw, and downstream at v + vw. (b) A second much simpler and more elegant solution is obtained by using the water as the reference frame. This approach has important applications in many more complicated problems; examples are calculating the motion of rockets and satellites and analyzing the scattering of subatomic particles from massive targets.arrow_forward
- You drive 5 km at 30 km/h and then another 5 km at 50 km/h. What is your average speed for the whole 10-km trip? a. More than 40 km/h b. 40 km/h c. less than 40 km/h d. not enough information to sayarrow_forwardWhich of the following ideas is true about projectile motion with no air drag? Select one: a. The acceleration is +g when the object is rising and -g when falling. b. The total velocity of the object is zero at the point of maximum elevation. c. The horizontal motion is independent of the vertical motion. d. The trajectory will depend on the object's mass as well as its initial velocity and launch angle.arrow_forwardIf the velocity and acceleration of an object are in the opposite directions, O a. The speed of the object increases with time. O b. The speed of the object decreases with time The object remains at rest. O d. The speed of the object remains constant.arrow_forward
- If you toss a ball upward with an initial speed v = 2m/s, it reaches a max height h without air resistance. Which initial speed do you have to use to reach a maximum height 2h? a.) 4 m/s b.) 1.414 m/s c.) 2.828 m/s d.) 1.732 m/sarrow_forward4) I use a pneumatic gun to launch a ball into the air from the roof of a building 30 m high at a velocity of 15 m/s. The ball just misses the edge of the building on its downward path. a. How long does it take for the ball to reach its maximum height? b. How high above the ground is the ball at its maximum height? c. Calculate the terminal velocity of the ball. d. Calculate the total time the ball is in the air Plot the value of position and velocity for the ball as functions of time. e.arrow_forward5. A bullet is fired at an initial velocity of 150 m/s and an angle of 56° at the top of a 120 m tall building. Neglecting air resistance, determine the following: a. The maximum height above the level ground that can be reached by the bullet. b. The time for the bullet to hit the ground. c. The velocity with which the bullet will hit the ground.arrow_forward
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Kinematics Part 3: Projectile Motion; Author: Professor Dave explains;https://www.youtube.com/watch?v=aY8z2qO44WA;License: Standard YouTube License, CC-BY