Ap physics 1 Ch 10 Test b systems of Particles & Momentum

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AP Physics 1 Ch 10 Test B

Systems of Particles & Momentum

Name _______________________________ Period ______

Correct Answer = 2 pt (MUST SHOW WORK WHERE ASKED)

*5pts **10pts

_____1.	Two identical bodies of mass M move with equal speeds v collide in a perfectly elastic collision. The direction of their velocities is illustrated below. The magnitude of the linear momentum of the system right after the collision is? SHOW WORK*
	A)	2 Mv
	B)	Mv
	C)	4 Mv
	D)
	E)

_____2. *Two bodies A and B move toward each other with velocities

and

. The mass of A is 140 g and the mass of B is 60 g. After a head-on collision the velocity of A is

. What is the velocity of B after the collision? SHOW WORK

	_____3.				*If you take the derivative of the kinetic energy of a particle with respect to its velocity, you get
				A)			force.
				B)			momentum.
				C)			acceleration.
				D)			mass.
				E)			potential energy.
	_____4.*				Vectors are the momentum vectors of two equal masses, m₁ and m₂. A third equal mass, m₃, has a momentum such that when the three masses collide and stick together the combined mass has zero velocity. The vector that best represents the momentum of mass m₃ is
				A)
				B)
				C)
				D)
				E)
_____5.*			The figure shows a ballistic pendulum in three states. The system (considered to be the ball and the pendulum) will move in such a way that
		A)				the kinetic energy is conserved during the collision.
		B)				the linear momentum is conserved after the collision.
		C)				the linear momentum is not conserved during the collision.
		D)				the total mechanical energy is conserved during the collision.
		E)				the total mechanical energy is conserved after the collision.

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