COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 3, Problem 5QAP
To determine
If you were playing tennis on the Moon, what adjustments would you need to make in order for your shots to stay within the boundaries of the court? Would the trajectories of the balls look different on the Moon compared to on Earth?
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A projectile is launched horizontally from an initial height of 1.2m, a launch and strikes the ground
6m downrange after 2.2s in the air. Please calculate:
• the launch angle 0
• the initial speed
• the magnitude of the velocity in the x-direction at impact
• the magnitude of the velocity in the y-direction at impact
9)
A projectile moves in a parabolic path without air resistance.
a) Is there any point at which acceleration a is parallel to velocity v ?
b) Is there any point at which acceleration a is perpendiculr tovelocity v ?
Explain using a graph for full credit.
• A horizontally moving tennis ball barely clears the net, a distance
a. To remain within the court’s border, a horizontal distance
b. Suppose the height of the net is 1.00 m, and the courts border is 1 2.0 m from the bottom of the net. Use g = 10 m/s2 and show that the maximum speed of the horizontally moving ball clearing the net is about 27 m/s (about 60 mi/h).
c. Does the mass of the ball make a difference? Defend your answer.
Chapter 3 Solutions
COLLEGE PHYSICS
Ch. 3 - Prob. 1QAPCh. 3 - Prob. 2QAPCh. 3 - Prob. 3QAPCh. 3 - Prob. 4QAPCh. 3 - Prob. 5QAPCh. 3 - Prob. 6QAPCh. 3 - Prob. 7QAPCh. 3 - Prob. 8QAPCh. 3 - Prob. 9QAPCh. 3 - Prob. 10QAP
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- • From ta = -25 s until to = -15 s the plane is taxiing east along the runway at a constant speed of 4 m/s. From ts until te = -10 s the plane slows down at a constant rate and comes to rest. • From te until to =0 the plane turns around, turning nearly in place so that by to it is facing west. • At to = 0 the plane is near the east end of the runway, at rest. From to until ti = 5.0 s it speeds up with a constant acceleration going west. At t, it is going at a speed of 8.75 m/s. • After t, the plane continues speeding up, but at a steadily reducing rate (i.e. it is still speeding up, but the magnitude of its acceleration is decreasing). It lifts off at t2 = 65 s going at a speed of 85 m/s, having gone a distance of 2980 m down the runway. • From t2 until t3 = 240 s the plane is climbing at an angle of 5.0° above horizontal, speeding up at a constant rate. At t3 it is going at a speed of 230 m/s. • At t3 the plane levels off, so it is flying at a constant height. From t3 until ta = 270 s…arrow_forwardUse the model for projectile motion, assuming there is no air resistance. A bomber is flying at an altitude of 30,000 feet at a speed of v = 510 miles per hour (see figure). When should the bomb be released for it to hit the target? (Give your answer in terms of the angle of depression from the plane to the target. Round your answer to two decimal places.) (No Response) • What is the speed of the bomb at the time of impact? (Round your answer to the nearest whole number.) (No Response) mi/hr 30,000 ftarrow_forwardA player kicks a ball with an angle o 360° to the horizontal and initial velocity of 15.5 m/s. Assuming the ball is moving in the vertical plane, Calculate: a-) time the ball reaches the highest point b-) maximum height c-) maximum range d-) flight time or time the ball is in the air e-) speed when the ball reaches the groundarrow_forward
- A boy throws a ball off of a second floor balcony by throwing it up into the air at some angle above horizontal. It comes back down, landing on the ground. Neglecting air resistance, the magnitude of velocity is greatest: A) just after it leaves the boy’s hand B) at the peak of the ball’s trajectory C) just before it hits the ground D) it remains the same throughout the motion E) impossible to tell without knowing the angle of projectionarrow_forwardQuestion A projectile was fired from the originOof the Cartesian coordinates on the edge of a cliff with an initial velocityV0=60i+175jThe projectile rises first and then falls into the sea at pointP, as shown in the following sketch. If you know that the projectile has a time of flight of 40 seconds, that air resistance is neglected, and that the gravitational acceleration isg=10 m/s2: 1- Calculate the firing angleα. 2. Prove that the parametric equations for the projectile motion are: \[ x(t)=60 t ; y(t)=-\frac{1}{2} g t^{2}+175 t \] 3. Deduce: a- The distanceDbetween the falling pointPand the cliff. b- The heightHof the cliff from the surface of the sea.arrow_forward• A projectile is released from A with velocity as shown. Determine the horizontal distance, d. 15° VA = 6 m/s 3 marrow_forward
- Vo 30° 10 m 10 m 20 m Find the following when the projectile is at point M. 1) Total time in flight (from launch to point M) 2) Height above the ground (Dy) (Pick ground level at launch point) 3) The velocity at point M (note in a projectile the velocity is tangent to the point and will be a 2-D answer.i.e. draw a triangle for velocity with x and y components MNarrow_forwardThe exit velocity of a baseball (its velocity as it leaves the bat) is 128 feet per second, in the direction of 30 above horizontal and directly towards the monster 30 fcot tall center field wall. If the ball was hit 4 feet above ground level, find a) Parametric equations that model the trajectory of the baseball, b) The maximum height of the baseball's fiight, c) If the center field fence is 400 feet from home plate is this a home run? d) What is the impact velocity of the ball? =) Sketch a graph representing the trajectory of the ball.arrow_forwardProblem 3: This projectile is launched on a 3-4-5 slope with an initial velocity vo of 400 feet per second at strikes a wall that is a distance d = 1600 feet from the launch point. Find: • The height h at which the projectile strikes the wall • The maximum height of the trajectory hmax d hmax harrow_forward
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