(a) A soccer player kicks a rock horizontally off a 44 m high cliff into a pool of water. If the player hears the sound of the splash 3.16 s later, what was the initial speed given to the rock (in m/s)? Assume the speed of sound in air is 343 m/s. 11.909 X The time given in the problem can be divided into two intervals: the time for the rock to hit the water and the time for the sound to return to the kicker. m/s (b) What If? If the temperature near the cliff suddenly falls to 0°C, reducing the speed of sound to 331 m/s, what would the initial speed of the rock have to be (in m/s) for the soccer player to hear the sound of the splash 3.16 s after kicking the rock? m/s Need Help? Read It Watch It

Jeff Bezos just landed on the moon and is conducting an experiment, he drops a hammer from rest from a height of 2.01 m and uses a stopwatch to measure that the hammer takes 1.04 s to hit the ground. 1) Determine the magnitude of the acceleration due to gravity on the moon. 2) he then throws the hammer straight up into the Martian sky. If it comes back to his hand in 4.20 s, with what speed did he throw it?

A student drove to the university from her home and noted that the odometer reading of her car increased by 12.0 km. The trip took 17.9 min. a.If the straight-line distance from her home to the university is 10.310.3 km in a direction 28.028.0º south of east, what was her average velocity? (magnitude and direction south of east) b.If she returned home by the same path 6.50h after she left, what was her average speed for the entire trip?

A soccer player kicks a rock horizontally off a 35.0-m-high cliff into a pool of water. If the player hears the sound of the splash 2.82 s later, what was the initial speed given to the rock? Assume the speed of sound in air is 343 m/s.

Nuclear explosions cause a blast wave, a high-pressure shock wave generated by the heat from the fireball. These shock waves can travel in air at an average speed of 738 mph. (1 mile = 1609 meters). If a nuclear weapon in detonated in Pittsburgh, how far will the blast wave have traveled from the location of detonation 2.39 s after the explosion? (Give your answer in meters)

Question 7. A car drives horizontally off the edge of a cliff that is 68.3 m high. The police at the scene of the accident note that the point of impact is 153 m from the base of the cliff. How fast was the car traveling when it drove off the cliff? Ans: 40.98 m/s ic ambuba inajeni noTER m

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In the sport of billiards, event organizers often remove one of the rails on a pool table to allow players to measure the speed of their break shots (the opening shot of a game in which the player strikes a ball with his pool cue). V. o h d The top of a pool table is a height h = 3.25 ft from the floor. If a player's ball lands a distance d 14.75 ft from the table edge, what is her break shot speed vo? 12.3 Vo = mph Incorrect At what speed v did her pool ball hit the ground? 4.21 mph = Incorrect

A car was traveling at 33.0 m/s on a poorly lit country road.  The driver started to brake 0.35 seconds after he sees that a bridge is under construction 75 meters ahead.  The car slowed down uniformly.  What must be the minimum acceleration be to avoid crashing into the construction?