In a police ballistics test, a 2.00-g bullet suddenly hits and becomes embedded in a 5.00-kg wood block which is hanging from a 1.20-m long string. This causes the block to swing through an arc of 3.50°

What was the speed of the bullet just before it hit the block? A) 16.7 m/s
B) 524 m/s
C) 25.3 m/s
D) 262 m/s
E) 789 m/s


B

Physics & Space Science

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A baseball is struck by a bat. While the ball is in the air, what objects exert forces on the ball?

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A carpenter is driving a 15.0-g steel nail into a board. His 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. Half of the kinetic energy of the hammer is converted into internal energyin the nail and does not flow out of the nail

What is the increase in temperature of the nail after the three blows that the carpenter needs to drive the nail in completely? The specific heat of steel is 448 J/kg ? K. A) 8.1 K B) 3.6 K C) 1.8 K D) 2.7 K E) 7.7 K

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