- #1

willingtolearn

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## Homework Statement

#1

Runner A is initially 4.0 mi west of a flagpole and is running with a constant velocity of 6.0 mi/h due to east. Runner B is initially 3.0 mi east of the flagpole and is running with a constant velocity of 5.0 mi/h due west. How far are the runners from the flagpole when their paths cross ?

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#2

The engine of a model rocket accelerates the rocket vertically upward for 2.0s as folows: at t = 0, its speed is zero; at t = 1.0s, its speed is 5.0 m/s; at t = 2.0s, its speed is 16 m/s. Plot a velocity-time graph for this motion, and from it determine (a) the average acceleration during the 2.0 s interval and (b) the instantaneous acceleration at t = 1.5s.

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#3

In Mostar, Bosnia, the ultimate test of a young man's courage once was to jump off a 400year old bride (now destroyed) into the River Neretva, 23 m below the bridge. (a) How long did the jump last ? (b) How fast was the diver traveling upon impact with the river ? (c) If the speed of sound in air is 340 m/s, how long after the diver took off did a spectator on the bridge hear the splash ?

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#4

How can you find the average velocities and instantaneous velocities when you only look at the graph ? (use any graph that you want to show me)

**Question ?**

Those are 3 problems and 1 question that I need help on.

If you guys answer those problems, can you guys please show in details or show work for me (I'm not a smart person and i am really slow in understanding). And if possible , can you guys please analyze the problems for me ? I am really appreciate it. Thanks a lot guys ! I know that is a lot to you guys, but i have tried half my day on those and i couldn't figure it out.