A 40-Kg Mass Has a Velocity of 4

question 34

Multiple Choice

A 4.0-kg mass has a velocity of 4.0 m/s, east when it explodes into two 2.0-kg masses. After the explosion one of the masses has a velocity of 3.0 m/s at an angle of 60° north of east. What is the magnitude of the velocity of the other mass after the explosion?

• A) 7.9 m/s
• B) 8.9 m/s
• C) 7.0 m/s
• D) 6.1 m/s
• E) 6.7 m/s

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Definitions:

Peat Coal

A precursor to coal formed from the partial decomposition of plant material in wet, acidic conditions, often used as fuel.

Synthetic Fuels

Man-made substances created to mimic traditional fossil fuels, often produced from coal, natural gas, or biomass, and intended to be a less polluting energy source.

Lignite Coal

A soft brownish coal showing traces of plant structure, the lowest grade of coal due to its relatively low heat content.

Bituminous Coal

A type of coal noted for its relatively high energy and carbon content, used primarily for electricity generation and steel production.