A dockworker applies a constant horizontal force of 85.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 11.0m in a time of 5.10s. What is the mass of the block of ice? If the worker stops pushing after 5.10s , how far does the block move in the next 5.00s ?

## Predict how fast the ball will be traveling 2 seconds laterYou throw a ball straight up in the air. The instant after leaving your hand, the balls speed is 30 meters per second. Ignoring the effects of air resistance, predict how fast the ball will be traveling 2 seconds later. |

## What is the magnitude of her total displacement during walkA wheel is spinning clockwise at a 10 revolutions per second at t = 0. Due to friction in the bearings supporting the axle, the wheel slows down, losing 0.500 revolutions per second in angular velocity each second, until it comes to rest. |

## Find the rms value of the electric field of this radiationThe microwave radiation left over from the Big Bang explosion of the universe has an average energy density of 3.89 × 10-14 J/m3 |

## Find this materials index of refractionLight rays in a material with index of refrection 1.25 can undergo total internal reflection, Find this material's index of refraction when the required critical angle is 67.9° |

## What is the force the left support exerts on the beamNow the gymnast (not holding any additional mass) walks directly above the right support. What is the force the left support exerts on the beam |

## What is the change in the periodA 0.740 m long brass pendulum experiences a 20.0°C temperature increase, Find the ratio of the change in period to the original period, What is the change in the period |

## How many miles could the car go on a single tabletSuppose one gallon of gasoline produces 1.41×108 J of energy, and this energy is sufficient to operate a car for 20.0 miles. how many miles could the car go on a single tablet |

## Find magnetic field at center of hemisphere of the brainMagnetoencephalography (MEG) is a technique for measuring changes in the magnetic field of the brain caused by external stimuli such as touching the body or viewing images of food. what is the magnetic field at the center of the hemisphere of the .. |

## Calculate the maximum acceleration experienced by the jumperA 71.6-kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 10.0 m, Calculate the maximum acceleration experienced by the jumper |

## Find the magnification when convex side is used as mirrorA spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +2.3. What is the magnification when the convex side is used as a mirror |

## Find out the change in mechanical energy due to frictionFind out the speed of a 56.7 kg thrill seeker at the bottom of the slide, assume no friction. If the thrill seeker has a speed of 24.1 m/s at the bottom, find out the change in mechanical energy due to friction. |

## Does the composition of the meteor make a big differenceA meteor that falls to earth from a great distance has a speed of 11 km/s. In class we found that the temperature of an iron meteor is 290,000K. We assumed all of the energy heats the meteor and none of it is transferred to the surroundings. |

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