A soccer player kicks a rock horizontally off a 40.0 m high cliff into a pool of water. If the player hears the sound of the splash 3.03 s later, what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s.

_________m/s

Calculate the area of both index cards : If a index card is 3inx5in and another is 5in x7in find the conversion factor by dividing the value in cm/in. Calculate the area of both index cards |

Find the speed at which the ball was launched : A playground is on the flat roof of a city school, 7.00 m above the street below. The vertical wall of the building is 8.00 m high, forming a 1.00 m high railing around the playground. Find the speed at which the ball was launched |

Determine what is the angle of projection : A projectile is fired in such a way that its horizontal range is equal to 5 times its maximum height. What is the angle of projection |

Operation of factories : Electricity to run production equipment - Operation of factories |

Find what was the initial speed given to the rock : A soccer player kicks a rock horizontally off a 40.0 m high cliff into a pool of water. what was the initial speed given to the rock |

Compute the companys contribution margin : Compute the companys contribution margin assuming the company uses the contribution margin format income statement. |

Prepare a schedule of cost of goods manufacturing : Prepare a schedule of cost of goods manufacturing for the company for the month. Left align all rows for formatting purposes. |

Calculate the cost of the ending inventory : Calculate the cost of the ending inventory using the FIFO, LIFO, and weighted average cost methods. |

Determine how long is the ball in flight : A ball is thrown from the top of a building upward at an angle of 35? to the horizontal and with an initial speed of 15 m/s. How long is the ball in flight |

## How much time elapses before he catches the leaderThe leader of a bicycle race is traveling with a constant velocity of +11.4 m/s and is 11.2 m ahead of the second-place cyclist. How much time elapses before he catches the leader |

## Find the magnitude of the total acceleration of the trainA train is rounding a circular curve whose radius is 2.00 102 m. At one instant, the train has an angular acceleration of 1.50 10-3 rad/s2 and an angular speed of 0.0200 rad/s |

## What is the angle when he releases the ropeA 56-kg student runs at 4.2m/s , grabs a hanging 10.0-m-long rope, and swings out over a lake. He releases the rope when his velocity is zero. What is the angle when he releases the rope |

## Determine the torque exerted by gravityA playground swing at its highest point during a child's play is 3.0 meters above the ground, Determine the torque exerted by gravity on a child on the swing when the swing is at the highest point of its motion |

## A 55-kg man holds a weight of 20 kg on his head.A 55-kg man holds a weight of 20 kg on his head. what is the work done by him against gravity if he moves a distance of 20 m (1) on a horizontal road, (2) on an incline of 1 in 5 ? take g = 10 m/s.s |

## Find the spring constant of the springA 3.00-kg object is fastened to a light spring, with the intervening cord passing over a pulley. The pulley is frictionless, and its inertia may be neglected. |

## What is the cost of using electrical energy to heatThe horizontal component Fx is shown by the histogram below as function of position along x-axis. There is also a kinetic frictional force of 0.50 N between mass and surface. |

## Suppose that a 100 cm3nbspbox in the shape of a cube issuppose that a 1.00 cm3nbspbox in the shape of a cube is perfectly evacuated except for a single particle of |

## What is the speed of the wreckageA 900 kg car travelling east at 15 m/s collides with 750 kg travelling north at 20 m/s. what is the speed of the wreckage |

## What was the rays angle of incidence on the diamondWhat was the ray's angle of incidence on the diamond. What should be the magnitude of , so that the net work done by it and the kinetic frictional force is zero. |

## What is the effective spring constant for stretching wireA wire of diameter 0.65mm and length 6.0m stretches 10mm when 5.5kg is hung from it. what is the effective spring constant for the stretching wire |

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