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 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

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A package was dropped very carefully from a plane moving with a horizontal velocity of 25m/s. How much distance did the package travel in the x-axis if the plane was 200m above the ground? (Let ay = -9.8m/s2).
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?
You encounter a moving walkway that is 81 m long and has a speed of 2.1 m/s relative to the ground. How long would it take you to cover the 81 m length of the walkway if, once you get on the walkway, you immediately turn around and start walking in the opposite direction with a speed of 1.6 m/s relative to the walkway? Express your answer using one significant figure.
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…
(a) A soccer player kicks a rock horizontally off a 39 m high cliff into a pool of water. If the player hears the sound of the splash 3.02 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 3.02 s after kicking the rock? m/s
A missile silo is used to launch military rockets vertically upward out of the silo, giving the rocket an initial speed of 79.6 m/s at ground level. As the rocket clears the silo, the engines fire, and the rocket accelerates upward at 3.90 m/s2 until it reaches an altitude of 1,080 m. At that point its engines fail, and the rocket goes into free fall, with an acceleration of -9.80 m/s². (You will need to consider the motion while the engine is operating and the free-fall motion separately. Due to the nature of this problem, do not use rounded intermediate values in your calculations-including answers submitted in WebAssign.) (a) Determine the velocity of the rocket (in m/s) at the end of the engine burn time and also the burn time (in s). (For the velocity, indicate the direction with the sign of your answer.) velocity at end of engine V = 92.22 Check your kinematic equation relating vo, V1, ay, and AYo → 1 (where velocity of rocket as it clears the silo, v, = velocity of the rocket at…
A parachutist after bailing out falls 50 m without friction. When the parachute opens, it decelerates at 2 m/s2. He reaches the ground with a speed of 3 m/s. At what height, did he bailout? (a) 293 m (b) 111 m (c) 91 m (d) 182 m
I was standing on the side of a 10-m foot bridge, holding a ball while watching a car approaching the bridge at uniform speed. When the car was 15 meters away from where I was standing, the ball that I was holding slipped in my hand and the car arrived at the bridge when the ball hit the ground. What was the speed of the train? ( Assume that the final velocity of the ball is NOT zero)
The position of a particle is r(t) = (9.0t²1 – 9.0ĵ + 4.0t³k) m. (a) What is the velocity of the particle at 0s and at 1.0 s (in m/s)? (Express your answers in vector form.) m/s ✓(0 s) V(1.0 s) Vavg = = = (b) What is the average velocity between 0 s and 1.0 s (in m/s)? (Express your answer in vector form.) m/s m/s
If a rock is thrown upward on the planet Mars with a velocity of 17 m/s, its height above the ground (in meters) after t seconds is given by H = 17t – 1.86t2. (a) Find the velocity (in m/s) of the rock after 1 second. m/s (b) Find the velocity (in m/s) of the rock when t = a. m/s (c) When (in seconds) will the rock hit the surface? (Round your answer to one decimal place.) t = (d) With what velocity (in m/s) will the rock hit the surface? m/s