Q1. One of the most powerful cranes in the world operates in Switzerland. It can slowly raise a load of M = 5000 tonnes to a height of h = 16.0 m (1 tonne = 1000 kg). How much work is done by the crane?

Q2. A car moves from a point located 26.0 m from the origin and at an angle of 35.0 from the x-axis to the point located 57.0 m from the origin and at an angle of 60.0 from the x-axis in 2.52 s. What is the magnitude of the average velocity of the car? A car moves from a point located 26.0 m from the origin and at an angle of 35.0 from the x-axis to a point located 56.0 m from the origin and at an angle of 60.0 from the x-axis in 2.50 s. What is the magnitude of the average velocity of car?

How fast is the bucket moving : A box is sliding up an incline that makes an angle of 27.7 ° regarding the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.113. The initial speed of the box at the bottom of the incline is 2.27 m/s... |

What is its height of the tower on a hot day : An iron tower in is 399 meters tall on a cold day (T = -6.7 degrees Celsius). What is its height of the tower on a hot day while the temperature is 31.5 degrees Celsius. |

What would be the block''s velocity : An electric field of 220000 N/C points due west at a certain spot. What is the magnitude of the force that acts on a charge of -10C at the spot. |

Which equations for the speed v0 is reasonable : What is the frequency of ultrasound in a medium if he wave length is 3.0 x 10^-3 m and velocity is 1300 mm/ms. |

What is the magnitude of the average velocity of car : A car moves from a point located 26.0 m from the origin and at an angle of 35.0 from the x-axis to the point located 57.0 m from the origin and at an angle of 60.0 from the x-axis in 2.52 s. |

What is the minimum current in the rod : When a potential difference of 166 V is applied to the plates of a parallel-plate capacitor, the plates carry a surface charge density of 32.0 nC/cm2. What is the spacing between plates. |

Marginal cost of pollution control : At this level of pollution, what is the marginal cost of pollution control. |

Calculate the tax incidence : Calculate the tax incidence of the buyers and the monopolist. |

Tax be the most efficient : If a tax were to be imposed on one of these items, for which item would the tax be the most efficient. |

## What is the specific heat of the brassA 65Kg ice skater pushes off his partner and accelerates backwards at 1.3m/s^2. If the partner accelerates in the opposite direction at 2.0m/s^2, what is mass of the other skater. |

## Find the coefficient between flight bag and floorAn asteroid is discovered heading straight toward Earth at 13km/s. An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 mins, after which the asteroid is moving at 28 degrees to its original path at a.. |

## Determine an initial volume of the gasA spring with spring constant 12.5 hangs from the ceiling. A 400 ball is attached to spring and allowed to come to rest. It is after that pulled down 6.80 and released. What is the time constant if the ball's amplitude has decreased to 3.90 after 57... |

## What direction is white dot on the sensor pointingWhat direction is white dot on the sensor pointing |

## What is the greatest velocity of this massA 4.70 kg mass causes a vertical spring to stretch 0.850 meters. The spring is after that stretch and extra 0.270 meters and release (as a stopwatch starts) causing the spring and mass to oscillate. |

## What is the radius of curvature of a concave mirrorWhat is the tangential acceleration of a bug on the rim of a 13.0-in.-diameter disk if the disk accelerates uniformly from rest to the angular speed of 76.0 rev/min in 3.50 s. |

## Determine the magnitude of the force on each chargeTwo negative and two positive point charges (magnitude = 3.64mC) are positioned on opposite corners of a square (each side = 0.155 m).Determine the magnitude of the force on each charge. |

## What would be the ball''s subsequent trajectoryA rattlesnake can strike with the acceleration equivalent to an increase in speed from 0 to 60 mi/h in 1/2 s. If the rattlesnake's head weighs 0.33 lb, what average power does the rattlesnake generate throughout its strike. |

## What is the speed of sound in a rod made of the metalThe coefficients of friction for plastic on wood are μs = 0.50 and μk = 0.40. How much horizontal force would you want to apply to a 4.0-lb plastic calculator to start it moving from rest. |

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