Subjects

Sections | |||
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Intro to 2D Motion | 32 mins | 0 completed | Learn |

Projectile Motion | 67 mins | 0 completed | Learn |

More Projectile Motion | 42 mins | 0 completed | Learn |

Initial Velocity in Projectile Motion | 20 mins | 0 completed | Learn |

Circular Motion | 27 mins | 0 completed | Learn |

Additional Practice |
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Motion in 2D |

Motion in 2D & 3D With Calc |

Projectile Motion: Horizontal & Negative Launch |

Projectile Motion: Positive Launch |

Projectile Motion: Launch From Moving Vehicle |

Relative Motion |

Solution: A river lies in the east - west direction. The current in the river has a velocity relative to the ground of 3 mi/hr toward the east. A boat has a maximum speed relative to the water of 4 mi/hr. The b

A river lies in the east - west direction. The current in the river has a velocity relative to the ground of 3 mi/hr toward the east. A boat has a maximum speed relative to the water of 4 mi/hr. The boat is heading so as to get across the river as soon as possible. If the river is one mile wide, how long does it take the boat to cross the river?

A. 8.6 minutes

B. 12 minutes

C. 15 minutes

D. 20 minutes

E. 60 minutes

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