A person sitting on the ground floor of a building notices through the window, of height 1.5 m, a ball dropped from the roof of the building and crosses the window in 0.1 s. What is the velocity of the ball when it is at the topmost point of the window? (g-10 m/s²) (1) 20 m/s (2) 15.5 m/s (3) 14.5 m/s (4) 4.5 m/s

A tennis player serves a tennis ball such that it is moving horizontally when it leaves the racquet. When the ball travels a horizontal distance of 19 m, it has dropped 49 cm from its original height when it left the racquet. What was the initial speed, in m/s, of the tennis ball? (Neglect air resistance.)

(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

Problem 2: An object is thrown off the top of a 38-m tall building with a velocity of 350 m/s at an angle of 8.2° with respect to the horizontal. Part (a) How long is the object in the air in seconds? Numeric : A numeric value is expected and not an expression. t = Part (b) What is the maximum height the object reaches above the ground in meters? Numeric : A numeric value is expected and not an expression. hmax = Part (c) What is the horizontal distance the object covers in meters? Numeric : A numeric value is expected and not an expression. Ax =.

At what speed must a basketball player leave the ground to rise 1.1 m above the floor in an attempt to get the ball?

An object is thrown vertically downward at 18 m/s from a window and hits the ground 1.6 s later. What is the height of the window above the ground? (Air resistance is negligible.)

Please use these equations to solve the problem:  v=v0+at  x=x0+v0t+1/2at2 Part A:  A stone is thrown upwards from the edge of a cliff 18 m high. It just misses the cliffon the way down and hits the ground below with a speed of 18.8 m/s. (a) With what velocity wasit released? (b) What is its maximum distance from the ground during its flight? Part B:  A rocket is fired vertically upward with an initial velocity of 80 m/s. It acceleratesupward at 4 m/s2 until it reaches an altitude of 1000 m when its engines fail and it enters free fall.(a) How long is the rocket in motion? (b) What is its maximum altitude? (c) What is its velocityjust before it crashes back into the earth? Part C:  A car moving at a constant speed of 30 m/s suddenly stalls at the bottom of a hill.The car undergoes a constant deceleration of 2 m/s2 while ascending the hill. (a) Write equationsfor the position and velocity as functions of time, taking x = 0 at the bottom of the hill. (b) Whatis the maximum distance…

If you take a man to the top of a 20 m tall building and throw him off with a velocity of 5 m/s directed horizontally, what’s the magnitude of his velocity upon hitting the ground (in m/s)? answers include: 22.4 m/s 19.8 m/s 9.8 m/s 20.4 m/s

A ball is launched vertically upward from ground level at 15.0 m/s. What is its height when its speed is 5.0 m/s? O 10.2 m the ball never has a speed of 5.0 m/s 26.8 m 4.85 m 14.1 m

A golf ball is hit horizontally off the edge of a 29 m high cliff and lands a distance of 21 m from the edge of the cliff. What was the initial vertical velocity of the golf ball, in m/s? Answer: m/s