COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 3, Problem 7QAP
To determine
The quantities out of the given quantities which are constant during the flight.
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Chapter 3 Solutions
COLLEGE PHYSICS
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- Problem 2: A baseball is thrown with velocity vo at an angle 0 = 45° above the horizontal. The vertical component of the initial velocity is vo.y = 12.25 m/s. Use a Cartesian coordinate system with the origin at the baseball's initial position.arrow_forwardSuppose that A>and B>have nonzero magnitude. Is it possible forA>+ B>to be zero?arrow_forwardThe components of vo are expressed as follows: Vinitial-x = Vocos(0) Vinitial-y = vosin(e) a) Let us first find the time it takes for the projectile to reach the maximum height. Using: Vfinal-y = Vinitial-y + ayt since the y-axis velocity of the projectile at the maximum height is Vfinal-y Then, = Vinitial-y + ayt Substituting the expression of vinitial-y and ay = -g, results to the following: t Thus, the time to reach the maximum height is tmax-height= We will use this time to the equation Yfinal - Yinitial = Vinitial-yt + (1/2)ayt2 if we use the time taken to reach the maximum height, therefore, the displacement will yield the maximum height, so hmax = Vinitial-yt + (1/2)ayt2 substituting, the vinitial-y expression above, results to the following hmax = t+ (1/2)ayt? Then, substituting the time, results to the following hmax = ( ) + (1/2)ayl Substituting ay = -g, results to hmax =( )- (1/2)g( simplifying the expression, yields hmax = x sinarrow_forward
- A projectile is fired from the origin at t 0 with a positive v. component, the Hight h can be evaluate using the following equation a) h = v; sin 0; v? sin? 0; h = b) 2g v? sin 0; C) h = YA = 0 2g V¡ sin v; d) h = 2g R a b darrow_forward) An object follows as shown below. What is the displacement from the last point to the starting point? Express your answer (a) in unit vector notation, and (b) as a magnitude and direction.arrow_forward#3) A soccer ball is kicked in Ritter Park such that the initial velocity vector is at 56.0 degrees angle relative to the ground and the magnitude of the initial velocity vector is 30.0 m/s. What is the time of flight of the ball and how far did it go (neglect air resistance and assume the ground is infinitely flat)? Remember, equations first, algebra, numbers last. Report answer to three sig figs.arrow_forward
- Part A) A projectile is launched with speed v0v0 and angle θθ. Derive an expression for the projectile's maximum height hh. Express your answer in terms of the variables v0v0, θθ, and appropriate constants. Part B) A baseball is hit with a speed of 34.0 m/sm/s . Calculate its height if it is hit at an angle of 30.0 ∘∘ . Express your answer with the appropriate units. Part C) A baseball is hit with a speed of 34.0 m/sm/s . Calculate its distance traveled if it is hit at an angle of 30.0 ∘∘ . Express your answer with the appropriate units. Part D A baseball is hit with a speed of 34.0 m/sm/s . Calculate its height if it is hit at an angle of 45.0 ∘∘ . Express your answer with the appropriate units. Part E) A baseball is hit with a speed of 34.0 m/sm/s . Calculate its distance traveled if it is hit at an angle of 45.0 ∘∘ . Express your answer with the appropriate units.arrow_forwardI) (a) We will start with displacement, the straight line (as the crow or airplane flies distance) covered by a moving object starting from an initial location and arriving at a final location. Vector quantities will be written in bold face i.e. A. Consider the situation of an ant that travels east, i.e. along the x axis, for 8 cm then travels northeast, i.e. 45° from the x axis, for 11 cm. Represent each leg of this journey by a vector on your graph paper. Vectors are written as arrows with the direction going from the tail of the arrow to the head of the arrow and the length of the arrow proportional to the magnitude (size) of the vector. Indicate the first part of the journey by an arrow of length 8 cm whose tail starts at the origin of your graph and whose head is at 8 units along the positive x direction. Call this vector A which is the displacement of the first part of the ant's journey. Now starting at the head of A draw a vector B which represents the second part of the ant's…arrow_forwardProblem 2-95, for this problem, just determine the position vectors AB, AC and AD in Cartesian and calculate the length of each vector. FBA = 350 lb 14 ft B -~-3 ft 3 ft- X C Z 6 ft. FCA = 500 lb FDA = 400 lb D 3 ft 3 ft 2 ft yarrow_forward
- What is the name of the quantity represented as i Unit vector in the x-direction O The unit vector in the y-direction. O Invariant magnitude O Length of the horizontal axis O Integral of motion 2.arrow_forwardA person walks 2.05 km south and then 2.75 km east, all in 3.00 hours. (a) What is the magnitude (in km) and direction (in degrees south of east) of her displacement during the given time? km • south of east magnitude direction (b) What is the magnitude (in km/h) and direction (in degrees south of east) of her average velocity during the given time? km/h • south of east magnitude direction (c) What was her average speed (in km/h) during the same time interval? km/harrow_forwardQuestion 2-9: Choose from the choices below how you would find the vector representing the change in velocity Av between the times t3 and t4 (at 2 and 3 s) in the diagram above. (Hint: Remember that the change in velocity is the final velocity minus the initial velocity, and the vector difference is the same as the sum of one vector and the negative of the other vector.) V4 A V3 Δν V4 -V3 B C V4 -V3 Δν Δν B Question 2-10: Based on the direction of this vector and the direction of the positive y axis, what is the sign of the acceleration +, 0 or -? Positive Negative Zeroarrow_forward
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