A window washer pulls herself upward using the bucket-pulley apparatus shown in Fig. 4-42. The mass of the person plus the bucket is 60 kg. (a) How hard must she pull downward to raise herself slowly at constant speed? If she increases this force by 12 percent, what will her acceleration be?

Find the acceleration of the center of mass of the ball : A basketball rolls without slipping down an incline of angle ?. The coefficient of static friction is ?s. Model the ball as a thin spherical shell. (Use any variable or symbol stated above along with the following as necessary: m for the mass of the .. |

Calculate the gauge pressure of the water guns reservoir : A hand-pumped water gun is held level at a height of 0.65 m above the ground and fired. Find the gauge pressure of the water gun's reservoir at the instant when the gun is fired |

A length of rope is wrapped around a spool of weight : A length of rope is wrapped around a spool of weight W with inner radius r and outer radius R. The rope is pulled with a tension T at an angle ?. Which of the following conditions must be satisfied for the spool to slide uniformly without rolling? co.. |

Calculate the time required for one complete revolution : A particular satellite was placed in a circular orbit about 160 mi above Earth. Determine the time required for one complete revolution |

A window washer pulls herself upward using the bucket-pulley : A window washer pulls herself upward using the bucket-pulley apparatus shown in Fig. 4-42. The mass of the person plus the bucket is 60 kg. (a) How hard must she pull downward to raise herself slowly at constant speed? If she increases this force by .. |

Bucket by a cord running over a frictionless pulley : A 28.0 kg block is connected to an empty 1.00 kg bucket by a cord running over a frictionless pulley (Fig. 4-57). The coefficient of static friction between the table and the block is 0.460 and the coefficient of kinetic friction between the table an.. |

Perform a heritage assessment on families : Perform a heritage assessment on three families and complete the "Heritage Assessment Tool" and submit to: - one assessment for each of the three families interviewed. |

What is the smallest angle the ladder can make : A uniform ladder of length L and weight 235 N rests against a vertical wall. What is the smallest angle the ladder can make with the floor without slipping |

Coefficient of kinetic friction between the slide and child : A child slides down a slide with a 26° incline, and at the bottom her speed is precisely half what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child. |

## Determine the tension in the stringAn object of 50.5 N is attached to the free end of a light string wrapped around a reel with a radius of 0.250 m and mass of 3.00 kg. The reel is a solid disk, free to rotate in a vertical plane about the horizontal axis passing through its center.. |

## Earth would weigh how much on neptuneA proton is initially at rest at a point where the potential is 455V. Sometime later the proton is at a point where the potential is 191V. If no force but the electrostatic force acts on the proton, what is its final kinetic energy. |

## What is the resistance of the wire coilA wire coil is connected to a DC power supply of 12.0 volts. The current in the coil is measured to be 375 mA. What is the resistance of the wire coil |

## How many kilograms of uranium would have to be minedThe United States uses 1.12×1019J of electrical energy per year. How many kilograms of uranium would have to be mined per year to provide that much 235U |

## Find the magnitude and direction of the induced currentA circular coil with a radius of 20 cm and containing 60 turns is placed in a uniform magnetic field which makes an angle of 30 degrees with respect to the plane of the coil, find the magnitude and direction of the induced current in the coil |

## The tractor beam exerts a constant forceA Federation starship ( 2.10×106kgkg ) uses its tractor beam to pull a shuttlecraft ( 2.10×104kgkg ) aboard from a distance of 15.0kmkm away. The tractor beam exerts a constant force of 4.0×104N4.0 \times 10^{4}\;{\rm N} on the shuttlecraft. Both spa.. |

## Determine how fast is dan going as his feet hit the groundDan is gliding on his skateboard at 4.00 m/s. He suddenly jumps backward off the skateboard, How fast is Dan going as his feet hit the ground |

## What is the resistance of the nichrome wireNichrome is a nickel chromium allot commonly used in heating elements. suppose you have a coil of nichrome wire that is 25.0 m long, what is the resistance of the Nichrome wire |

## How much time does it take for the ball to reach the wallA ball player hits a home run, and the baseball just clears a wall 20.6 m high located 121.0 m from home plate. How much time does it take for the ball to reach the wall |

## A light spring with spring constantA light spring with spring constant 1200 N/m hangs from an elevated support. From its lower end hangs a second light spring, which has spring constant 1650 N/m. An object of mass 1.50 kg is hung at rest from the lower end of the second spring. |

## Determine the magnitude of this resistorA galvanometer has an internal resistance of 30?and deflects full scale for a 60??A current, What is the magnitude of this resistor |

## What is the magnitude of the unknown force in newtonsA mass of 6 kg lies on a horizontal, frictionless floor. A force of 85 Newtons pushes to the left (negative x direction) with a force of 85 Newtons. What is the magnitude of the unknown force in Newtons |

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