Exam 7: Linear Momentum

A 3.00 kg mass is located at x = 2.0 cm and y = 0.0.A 3.00 kg mass is located at x = 0.0 and y = 2.0 cm.A 4.00 kg mass is located at x = 3.0 cm and y = -3.0 cm.Where is the location of the center of mass?

A 1500 kg car accelerates from rest to 35 m/s in 6.5 s.If its engine and tires are able to provide a force to the car of 8500 N,what was the magnitude of the sum of forces due to friction and air resistance on the car during this interval?

A 5.00 kg mass is moving at 4.00 m/s 30.0 degrees SOUTH of WEST and a 2.00 kg mass is moving at 3.00 m/s 60.0 degrees SOUTH of EAST .The velocity of the center of mass is (a),and the velocity NORTH of the center of mass is (b)

A 1200 kg car travels at 25.0 m/s and collides head-on in a perfectly inelastic collision with a stationary 2400 kg truck.The kinetic energy lost in the collision is

A 4.00 kg ball is moving at 2.00 m/s to the SOUTH and a 6.00 kg ball is moving at 2.00 m/s to the NORTHWEST.The total momentum of the system is

A 4.00 kg mass is moving at 4.00 m/s 45.0 degrees NORTH of WEST and a 6.00 kg mass is moving at 3.00 m/s 30.0 degrees SOUTH of EAST .The velocity of the center of mass is (a),and the velocity NORTH of the center of mass is (b)

A 4.00 kg object is moving at 5.00 m/s EAST.It strikes a 6.00 kg that is at rest.The objects have an elastic collision.The velocity of 4.00 kg object after the collision is in the SOUTHWEST direction.The velocity of the 6.00 kg object after the collision is

A 3.00 kg object is moving at 5.00 m/s EAST.It strikes a 6.00 kg that is moving EAST at 2.00 m/s.The objects have a one-dimensional elastic collision in the EAST-WEST direction.The velocity of the 3.00 kg object after the collision is

A 2.0 kg ball is moving at 4.0 m/s WEST.The momentum of the ball is

A 4.00 kg object is moving at 5.00 m/s SOUTH.It strikes a 3.00 kg object that is moving WEST at 2.00 m/s.The objects have a completely inelastic (stick together)collision.The kinetic energy lost in the collision is

An airplane has a mass of 8,000 kg and is flying at 150 m/s in level flight.The airplane drops 1,000 kg of water on a fire below.The velocity of the airplane after dropping the water is

A 120 kg mass is blown apart into a 80 kg piece and a 40 kg piece.After the blast,the two masses are moving apart with a relative velocity of 60 m/s.The velocity of the 80 kg mass is

A 100.0 kg mass is blown apart into a 95.00 kg piece and a 5.000 kg piece.After the blast,the two masses are moving apart with a relative velocity of 100.0 m/s.The kinetic energy of the 95.00 kg mass after the explosion is

A 3.000 kg ball is pitched with a kinetic energy of 20.00 Joules.Then the momentum of the ball is

A 120 kg mass is blown apart into an 80 kg piece and a 40 kg piece.After the blast,the two masses are moving apart with a relative velocity of 60 m/s.The total kinetic energy after the explosion is

A 4.00 kg ball is moving at 4.00 m/s to the EAST and a 6.00 kg ball is moving at 3.00 m/s to the NORTH.The total momentum of the system is

A 8.00 kg mass is moving at 5.00 m/s SOUTH and a 6.00 kg mass is moving at 7.00 m/s EAST.The velocity of the center of mass is (a),and the velocity NORTH of the center of mass is (b)

In an elastic collision,one ball has initial velocity v and strikes another,much less massive ball,that is initially at rest in a head-on collision.The velocity of the second ball after the collision is equal to:

An astronaut in a space suit is motionless in outer space.The propulsion unit strapped to her back ejects some gas with a velocity of 50 m/s.The astronaut recoils with a velocity of 1.0 m/s.If the mass of the astronaut and space suit after the gas is ejected is 120 kg,the mass of the gas ejected is

A 5.00 kg ball is traveling at 4.0 m/s and strikes a wall.The ball bounces off the wall with a velocity of 4.0 m/s in the opposite direction.If the contact with the wall by the ball lasts for 0.10 seconds,then the magnitude of the impulse on the ball is