Q1 a piece of granite is thrown upward with a speed of 25, Ask an Expert

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Q1. A piece of granite is thrown upward with a speed of 25 m/s from a cliff that is 80 m high. How much time goes by before it hits the water below? What is its velocity at impact? What will its average velocity be? What will its average speed be?

Q2. A trapeze artist swings in straightforward harmonic motion with a period of 3.8 s. rodriguez (ar38765) - Homework 05 - luers - (38911) 2

The acceleration of gravity is 9.81 m/s2 .

Estimate the length of the cables supporting the trapeze.

Answer in units of m.

Q3. The tungsten filament of an assured 100 W light bulb radiates 3.50 W of light. (The other 96.5 W is carried away by convection and conduction.) The filament has surface area of 0.310 mm2 and an emissivity of 0.950. Find out the filament's temperature. (The melting point of tungsten is 3683 K)

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