(a) A soccer player kicks a rock horizontally off a 35 m high cliff into a pool of water. If the player hears the sound of the splash 2.84 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. 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 2.84 s after kicking the rock? m/s Need Help? Read It Watch It

(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 3.19 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. 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 3.19 s after kicking the rock? m/s

provides useful background for this problem. A diver runs horizontally with a speed of 1.23 m/s off a platform that is 9.10 m above the water. What is his speed just before striking the water?

Henrietta is going off to her physics class, jogging down the sidewalk at a speed of 4.10 m/s. Her husband Bruce suddenly realizes that she left in such a hurry that she forgot her lunch of bagels, so he runs to the window of their apartment, which is a height 43.4 m above the street level and directly above the sidewalk, to throw them to her. Bruce throws them horizontally at a time 5.00 s after Henrietta has passed below the window, and she catches them on the run. You can ignore air resistance Part A With what initial speed must Bruce throw the bagels so Henrietta can catch them just before they hit the ground? Express your answer using three significant figures. mis Submit Request Answer Part B Where is Henrietta when she catches the bagels? Express your answer using three significant figures. m from the house Submit Request Answer

A toy rocket moving vertically upward passes by a 1.8 m -high window whose sill is 7.0 m above the ground. The rocket takes 0.16 s to travel the 1.8 m height of the window. a) What was the launch speed of the rocket? Assume the propellant is burned very quickly at blastoff. b) How high will the rocket go?

Two friends are tossing balls from the main floor of the auditorium to the balcony. One person stands exactly 4.0 m above the other person, and both release and catch the balls at the same height above their feet. The balls are always caught on their way down. The boy on the main floor releases his ball with an initial velocity of 25 m/s [up]. With what velocity should the girl on the balcony throw her ball at the same moment, so that both balls will be caught by the other person at exactly the same time

Two cars are moving towards an intersection. One car is 150 meters north of the intersection and moving towards the intersection at 20 m/s, while the other is 180 meters west of the intersection and moving towards the intersection at 16 m/s. How rapidly are the cars approaching each other 4 seconds later?

In a 80 meter tall building, there are two elevators, 4 meters apart. Elevator A is on the top floor, elevator B is on the ground floor. At the same time, the two elevator starts to move. Elevator A is moving downward at a contant speed of 2ms, elevator B is moving upward at a constant speed of 1ms. How fast is the distance between the elevators changing 5 seconds later? please provide steps to solution

Daniel takes his two dogs, Pauli the Pointer and Newton the Newfoundland, out to a field and lets them loose to exercise. Both dogs sprint away in different directions while Daniel stands still. From Daniel's point of view, Newton runs due North at 3.90m/s, but from Pauli's point of view, Newton appears to be moving at 1.50 m/s due East. What must Pauli's velocity relative to Daniel be for this to be true? Express your answer in terms of the ? and ?‑components if North is the +? direction and East is the +? direction. a) ?-component (m/s):    ?-component (m/s):   b) Express your answer as a magnitude and an angle measured counter‑clockwise from due East.