3. Two balls are thrown from the top of a build-ing, as in the drawing. Ball 1 is thrown straightdown, and ball 2 is thrown with the same speed,but upward at an angle 0 with respect to the hor-izontal. Consider the motion of the balls afterBall 2Ball 1they are released. Which one of the followingstatements is true? (a) The acceleration of ball 1becomes larger and larger as it falls, because theball is going faster and faster. (b) The accelerationof ball 2 decreases as it rises, becomes zero at thetop of the trajectory, and then increases as the ball begins to fall towardthe ground. (c) Both balls have the same acceleration at all times. (d) Ball2 has an acceleration in both the horizontal and vertical directions, butball 1 has an acceleration only in the vertical direction.

Given that the ball 2 is thrown upwards with initial vertical acceleration so the ball has a…

Answered: 3. Two balls are thrown from the top of…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A) You are driving at a constant velocity of magnitude v0 when you notice a garbagecan on the road in front of you. At that moment, the distance between the garbage can and thefront of the car is d. A time t after noticing the garbage can, you apply the brakes and slow downat a constant rate before coming to a halt just before the garbage can. B) Find the magnitude of ax, the acceleration of the car after the brakes are applied, in terms ofthe variables d, t, and v0 You should have found in part B. that ax = v20C) 2(d−v0t). Based on this expression, what happensto ax if t increases and all the other variables remain constant?i) decreases because it is inversely proportional to a linear function of t that increases as t increases.ii) increases because it is inversely proportional to a linear function of t that increases as t increases.iii) increases because it is a linear function of t.iv) decreases because it is inversely proportional to a linear function of t that decreases as t…
2. Assume that a particle, initially at the origin, travels in space with a velocity of V = cos(at)î + (5 – 10t)f – k, where t stands for time. (a) What is the acceleration of the particle as a function of time? (b) What is the position of the particle as a function of time? (c) Which component(s) of the particle's position vector will become zero again once the particle leaves the origin?
A projectile is fired from a gun and has an initial vertical velocity equal to 30 m/s. What is the acceleration of the projectile when it reaches its maximum height? Its magnitude is 9.8 m/s2 and; its direction is changing. 9.8 m/s?, downward O m/s2 less than 9.8 m/s-but non-zero. 4.9 mm/s?, downward
#2) For this problem, ignore air resistance and assume the magnitude of the acceleration due to gravity is equal to 9.80 m/s². Let's also use up as the positive direction. Report answers to 3 sig figs. ECANSU (A) A rocket, initially at rest on the ground, accelerates straight upward from rest with constant net acceleration of 32.8 m/s2. The acceleration period lasts for a time of 3.47 s until the fuel is exhausted. Find the height the rocket reaches in the first 3.47 s. Show starting equations, algebra first, show final equations, numbers last. (B) After 3.47s, the fuel runs out and the rocket is now in free fall as it continues its motion. Find the total maximum height the rocket reaches as measured from the ground. Show starting equations, algebra first, show final equations, numbers last.
A place kicker A executes a "pooch" kick, which is designed to eliminate a potential return by the receiving team. The "pooch" kick features a high trajectory and short range, thereby preventing the deep kick returner B from reaching his maximum speed before encountering coverage. To offset this, player B hesitates for 0.94 sec after the ball is kicked, and then accelerates at a uniform rate, reaching his maximum speed at the instant he catches the ball. Determine the velocity of the football relative to the receiver at the instant the catch is made if the football is caught when it is 5.3 ft above the playing surface. B 57 yd y 1 I L--x 66 ft/sec 50⁰
32. An object moves with constant acceleration 4.00 m/s² and over a time interval reaches a final velocity of 12.0 m/s. (a) If its original velocity is 6.00 m/s, what is its displacement during the time interval? (b) What is the distance it travels during this interval? (c) If its original velocity is -6.00 m/s, what is its dis- placement during this interval? (d) What is the total distance it travels during the interval in part (c)?
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1. A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24.0° below the horizon- tal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration of 4.00 m/s2 for a distance of 50.0 m to the edge of the cliff, which is 30.0 m above the ocean. Find (a) the car's position relative to the base of the cliff when the car lands in the ocean and (b) the length of time the car is in the air.
.2) the position of a particle with respect to time is defined by:r(t) = rcos(cot )i +rsin(cot)j ,where r and w are constants.Demonstrate that the magnitude of the acceleration of the particle is constant.
Two cars are travelling east along a straight highway at the same speed. At an intersection, the highway branches and splits into two straight roads, one heading approximately north-east and one heading approximately south-east. The angle betwen the two roads is 60 degrees. The two cars leave the intersection at the same time, one travelling north-east at 100 km/h and the other travelling south-east at 80 km/h. How fast is the distance between the two cars changing 30 minutes after they leave the intersection.
Two cars are leading toward one another. Car A is moving with an acceleration of a = 4 m/s² i. Car B is moving with a constant acceleration ab = -2 m/s2 i and initial velocity of VB = -60 m/s i since it started. The cars are initially separated by a distance d = 900 m on the x-axis and car A is initially at rest. At what distance from the initial position of A do car A and car B meet? A. 200 m B. 400 m C. 300 m D. 500 m E. 600 m ΟΑ OB OC OD SOE K

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