QUESTION How would the time of the jump and the horizontal distance traveled change if g were changed, for example if the jump could be repeated with the same initial velocity on a different planet? (Select all that apply.) O The displacement increases with increased time of the jump. O The displacement decreases with increased time of the jump. O Increasing the time of the jump has no effect on the displacement. O The time of the jump decreases when g is smaller. O The time of the jump increases when g is smaller.

QUESTION How would the time of the jump and the horizontal distance traveled change if g were changed, for example if the jump could be repeated with the same initial velocity on a different planet? (Select all that apply.) O The displacement increases with increased time of the jump. O The displacement decreases with increased time of the jump. O Increasing the time of the jump has no effect on the displacement. O The time of the jump decreases when g is smaller. O The time of the jump increases when g is smaller.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter3: Motion Along A Straight Line

Section: Chapter Questions

Problem 20CQ: Suppose you throw a rock nearly straight up at a coconut in a palm tree and the rock just misses the...

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Suppose you throw a rock nearly straight up at a coconut in a palm tree and the rock just misses the coconut on the way up but hits the coconut on the way down. Neglecting air resistance and the slight horizontal variation in motion to account for the hit and miss of the coconut, how does the speed of the rock when it hits the coconut on the way down compare with what it would have been if it had hit the coconut on the way up? Is it more likely to dislodge the coconut on the way up or down? Explain.
An object moves freely upward. The acceleration at maximum height is I am confused. When at max velocity, velocity is zero. But at that point gravity is negative or -g, magnitude is g. Is accleration at maximum height zero? Please explain the rest.
Two blocks A and B are released from rest on a 30-deg incline when they are 15 m apart. The fk under the upper block A is 0.2 while that the lower block B is 0.4. a. Find the time (seconds) that they will touch. b. Find the distance (meters) traveled by A when they touch. (use g=9.81 m/s^2)
PRACTICE ANOTHER A knife is dropped from the top of a 16.0 m high mast on a ship moving at 1.74 m/s due south. (a) Calculate the velocity of the knife relative to the ship when it hits the deck of the ship. m/s (down)(b) Calculate the velocity of the knife relative to a stationary observer on shore. m/s Â° (below the horizontal to the south (c) Discuss how the answers give a consistent result for the position at which the knife hits the deck.
A student determine to test the law of gravity for himself walks off a skyscraper 300m high, stopwatch in hand and starts his free fall (zero initial velocity). Five seconds later, Superman arrives at the scene and dives off the roof to save the student. What must Superman’s initial velocity be in order that he catch the student just before the ground is reach? (Assume that Superman’s acceleration is that of any freely falling body).
a ball is dropped from the top of a building 8m above the ground. with a velocity of 22.2 m/s at an angle of 29 degrees below the horizontal. 1) what speed will the ball hit the ground with? 2) if the ball had been thrown above the horizontal would the impact velocities be the same?
A group of students launches a model rocket in the vertical direction. Based on the tracking data, the altitude of the rocket was 89.6 ft at the end of the powered portion of the flight and that the rocket landed 16s later. Knowing that the descent parachute failed to deploy so that the rocket fell freely to the ground after reaching its maximum point. Determine (a) the speed of the rocket at the end of the powered flight and (b) the maximum altitude reached by the rocket.
A soccer ball is kicked with a velocity of 8.9 m/s at an angle of 38° above thehorizontal. The keeper is standing 3.7 m away from forward who kicked the ball. Thekeeper is only 1.3 m tall and thinks they do not need to jump to stop the ball.Calculate the maximum height of the ball and the distance it will travel in the x-direction when it reaches that maximum height. Determine if the keeper will be ableto save that shot?
13. On a distant planet, an astronaut drops a steel ball from a height of 150 meters. He observes that it takes 10 seconds for the ball to reach the surface of the planet. The distance that the ball falls from the starting point is recorded with the instruments that he carries in his spaceship, with this, he generates the table shown below. Using the data provided, determine the gravitational acceleration corresponding to the planet the astronaut is on. Write the answer using two significant figures. Heigh m // time seconds 0 0 6 2 24 4 54 6 96 8 150 10
A hovercraft is initially at rest but floating above land. The hovercraft has two horizontal thrusters. One provides acceleration of aNORTH= 5.15 m/s2 (NORTH). The second one provides an acceleration of aEAST= 4.75 m/s2 (EAST). If the north thruster fires for 7.33 seconds and the east thruster fires for 4.87 seconds, what is the velocity of the hovercraft after both thrusters fired? Air resistance doesn't have an effect.
In one of your experiments, you will roll a marble down a ramp to provide an initial horizontal velocity. Suppose you start the marble at rest (Vo=0 m/s) and it travels at distance of , d , down the ramp. use 1-D kinematics to prdict the velocity of the ball (Vf) at the bottom of the ramp. Hint: The acceleration of the ball down the ramp is 9.81*sin(θ) m/s2 where θ is the agle of the ramp. Record the answer in variables ( you will calculate the velocity with magnitudes when you perfrm the experiment).
In a preseason game on August 21, 2009, A. J. Trapasso punted a ball that struck the newly installed high-definition JumboTron at Cowboys Stadium. The 600-ton JumboTron was located 130 ft above the field. The ball traveled 15 yd horizontally before striking the JumboTron. Assume the ball barely makes it up 130 ft. and find the vertical velocity component vy,0. Round the final answer to four decimal place. Determine the total time of the ball’s journey (including both rise and fall). Round the final answer to four decimal places. Calculate the horizontal velocity component of the ball vx,0. Round the final answer to four decimal places. Calculate the launch speed. Round the final answer to four decimal places. Determine the launch angle. Round the final answer to two decimal places.