As shown in the figure, a bullet of mass 0.010 kg moving horizontally suddenly strikes a block of wood of mass 1.5 kg that is suspended as a pendulum. The bullet lodges in the wood, and together they swing upward a vertical distance of 0.40 m. The length of the string is 2.0 m. What was the speed of the bullet just before it struck the wooden block? 
Definitions:
Immunosuppression
A reduction of the effectiveness of the immune system, either as a result of disease, medical treatment, or intentional therapeutic intervention.
Oral Mucus Membranes
The moist lining of the oral cavity, including the lips, cheeks, gums, and tongue, which can be susceptible to infections and diseases.
Hydrogen Peroxide
A chemical compound often used as a disinfectant or bleaching agent.
Ineffective Protection
A situation where an individual's mechanisms for defending against illness or injury are unable to function optimally.
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