Q1. A good baseball pitcher can throw a baseball toward home plate at 98 mi/h with a spin of 1590 rev/min. How numerous revolutions does the baseball make on its way to home plate? For simplicity, suppose that the 60 ft path is a straight line.

Q2. A gasoline engine absorbs 2,600 J of heat and performs 1,000 J of mechanical work in each cycle. The total of heat expelled in each cycle?

Q3. A casting of mass 50 kg is placed on a plane inclined at 30° to the horizontal. If the coefficient of friction is 0.4, find the time taken for the casting to slide down the plane a distance of 10 m without any external force being applied. Find out also, the force necessary to give the casting an acceleration of 2 m/s2 up the plane.

How much kinetic energy was lost throughout the collision : After the collision, the 2.00-kg object has a velocity 5.00 m/s to the west. How much kinetic energy was lost throughout the collision. |

How far away was the spacecraft : While Voyager 2 sent back pictures of Neptune during its historic flyby of that planet in 1989, the spacecraft's radio signals travelled for 4 hours at the speed of light to reach Earth. How far away was the spacecraft. |

Establish the cars speed from these observations : Standing at a crosswalk, you hear a frequency of 520 Hz from the siren of an approaching police car. After the police car passes, observed frequency of the siren is 455 Hz. Establish the car's speeds from these observations. |

How deep is the river directly below boat : An anchor holding a boat stationary on a river forms a 65 degree angle with the river bottom. The anchor line is 40 meters long. Assume the river has a uniform depth, how deep is the river directly below boat. |

Find the total of heat expelled in each cycle : A gasoline engine absorbs 2,600 J of heat and performs 1,000 J of mechanical work in each cycle. Find the total of heat expelled in each cycle. |

Illustrate that the least distance from seawall : A harmonic wave travels in a wire with amplitude 6.05 mm, wavelength 0.451 m, and frequency 462 Hz. What is speed with which the wave travels. |

Find the acceleration of the elevator : The distance between the first and fifth minimum on a screen 60 cm behind the slits is 6.0 mm. What is the wavelength of the light used in this experiment. |

What is intensity delivered to the eardrum : A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 29.7 dB. The hearing aid picks up sound having a frequency of 250 Hz at an intensity of 3.10 10-11 W/m2. What is intensity delivered to t.. |

What is resistance of the gold wire : Two wires are identical, except that one is aluminium and one is gold. The aluminium wire has a resistance of 0.18. What is resistance of the gold wire. |

## Find the magnitude of the resulting magnetic fieldA sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere. |

## Find the equivalent resistanceA resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners. |

## What is the electric field at the locationQuestion: Field and force with three charges? What is the electric field at the location of Q1, due to Q 2 ? |

## What is the maximum displacement of the bridge deckWhat is the maximum displacement of the bridge deck? |

## What is the magnitude of the current in the wireWhat is the magnitude of the current in the wire as a function of time? |

## Introductory mechanics: dynamicsCalculate the smallest coefficient of static friction necessary for mass A to remain stationary. |

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