Entering his dorm room, a student tosses his book bag to the right and upward at an angle of 45° with the horizontal (Fig. OQ4.2). Air resistance does not affect the bag. The bag moves through point Ⓐ immediately after it leaves the student’s hand, through point Ⓑ at the top of its flight, and through point Ⓒ immediately before it lands on the top bunk bed. (i) Rank the following horizontal and vertical velocity components from the largest to the smallest. (a) υ Ⓐ x (b) υ Ⓐ y (c) υ Ⓑ x (d) υ Ⓑ y (e) υ Ⓒ y . Note that zero is Larger than a negative number. If two quantities are equal, show them as equal in your list. If any quantity is equal to zero, show that fact in your list. (ii) Similarly, rank the following acceleration components. (a) a Ⓐ x (b) a Ⓐ y (c) a Ⓑ x (d) a Ⓑ y (e) a Ⓒ y .
Entering his dorm room, a student tosses his book bag to the right and upward at an angle of 45° with the horizontal (Fig. OQ4.2). Air resistance does not affect the bag. The bag moves through point Ⓐ immediately after it leaves the student’s hand, through point Ⓑ at the top of its flight, and through point Ⓒ immediately before it lands on the top bunk bed. (i) Rank the following horizontal and vertical velocity components from the largest to the smallest. (a) υ Ⓐ x (b) υ Ⓐ y (c) υ Ⓑ x (d) υ Ⓑ y (e) υ Ⓒ y . Note that zero is Larger than a negative number. If two quantities are equal, show them as equal in your list. If any quantity is equal to zero, show that fact in your list. (ii) Similarly, rank the following acceleration components. (a) a Ⓐ x (b) a Ⓐ y (c) a Ⓑ x (d) a Ⓑ y (e) a Ⓒ y .
Solution Summary: The author explains the rank in order of decreasing horizontal and vertical components of velocities. A projectile motion is a two dimensional motion, in which the object launched into the air and experiences free fall.
Entering his dorm room, a student tosses his book bag to the right and upward at an angle of 45° with the horizontal (Fig. OQ4.2). Air resistance does not affect the bag. The bag moves through point Ⓐ immediately after it leaves the student’s hand, through point Ⓑ at the top of its flight, and through point Ⓒ immediately before it lands on the top bunk bed. (i) Rank the following horizontal and vertical velocity components from the largest to the smallest. (a) υⒶx (b) υⒶy (c) υⒷx (d) υⒷy (e) υⒸy. Note that zero is Larger than a negative number. If two quantities are equal, show them as equal in your list. If any quantity is equal to zero, show that fact in your list. (ii) Similarly, rank the following acceleration components. (a) aⒶx (b) aⒶy (c) aⒷx (d) aⒷy (e) aⒸy.
A projectile is fired at 75 degrees above the horizontal line with an initial velocity v0. At which of the following angles the projectile will land at the same distance as it is landed when fired at 75 degrees?
A. 15 degrees
B. 25 degrees
C. 35 degrees
D. 45 degrees
A pilot flies horizontally at 1300 km/h, at height h = 35 m above initially level ground. However, at time t = 0, the pilot begins to fly over ground sloping upward at angle u = 4.3°. If the pilot does not change the airplane’s heading, at what time t does the plane strike the ground?
A 0.30 kg football is thrown from a height of 2.5 m with an initial velocity of
25.0 m/s (34° above the horizontal axis). Assuming that there is no air resistance
and that the ball lands on the ground, how far will the ball travel horizontally?
Chapter 4 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
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