Question

Using energy considerations, and assuming negligible air resistance, show that a rock thrown from a bridge 20.0 m above water with initial speed of 15 m/s directly downward, strikes the water with a speed of 24.8 m/s. If the rock is thrown directly upward with the same 15 m/s initial speed, what would the speed be when it strikes the water?

Name: using energy considerations and assuming negligible air resistance show that a rock thrown from a bridge 200 m above water with initial speed of 15 ms directly downward strikes the water wit 09452
Uploaded: 2022-09-21T14:21:53-08:00
Duration: 1 min 13 s
Channel: Sri K
Description: using energy considerations and assuming negligible air resistance show that a rock thrown from a bridge 200 m above water with initial speed of 15 ms directly downward strikes the water wit 09452

          Using energy considerations, and assuming negligible air
resistance, show that a rock thrown from a bridge 20.0 m above
water with initial speed of 15 m/s directly downward, strikes the
water with a speed of 24.8 m/s. If the rock is thrown directly
upward with the same 15 m/s initial speed, what would the speed be
when it strikes the water?

Added by Michael M.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Sri K

09/21/2022

Step 1

5 * m * u^2 where m is the mass of the rock and u is the initial speed (15 m/s) Show more…

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Using energy considerations, and assuming negligible air resistance, show that a rock thrown from a bridge 20.0 m above water with initial speed of 15 m/s directly downward, strikes the water with a speed of 24.8 m/s. If the rock is thrown directly upward with the same 15 m/s initial speed, what would the speed be when it strikes the water?