During the siege of the Alamo, both Mexicans and Texans fired at each other with cannons. Along the Alamo walls were 18-pound cannons. These cannons weighed an average of 1270.059 kg. They fired an 18-pound (8.1647 kg) cannonballs. If the velocity of the cannonball peaks at 248 m/s, what was the recoil velocity of the cannon?

Two particles of masses m and 2m are placed on a smooth horizontal table. a string, which joins these two masses, hangs over the edge supporting a pulley, which suspends a particle of mass 3m.the pulley has negligible mass. the two parts of the string on the table are parallel and perpendicular to the edge of the table. the hanging parts of the string are vertical. find the acceleration of the particle of mass 3m.

Ahorizontal force of 400.0 n is required to pull a 1760 n truck across the floor at a constant speed. find the coefficient of sliding friction.

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?