AP Physics Momentum

When the velocity of a moving object is quadrupled, which of the following is also quadrupled?

• Kinetic energy

• Momentum

• Potential energy

• Acceleration

Tags

NGSS.HS-PS2-2

NGSS.HS-PS3-2

Two friends with mass 60.0 kg and 40.0 kg run directly toward each other with speeds 3.0 m/s and 2.0 m/s respectively. If they hold on to each other after they collide, their combined speed just after the collision will be:

• 0 m/s

• 1.0 m/s

• 1.6 m/s

• 2.0 m/s

Tags

NGSS.HS-PS2-2

Which of the following is true about an object of mass, m ₁ moving on a horizontal frictionless surface that strikes and sticks to an object of mass m₂ (m ₁ >m₂ )?

• The object m1 has greater momentum after the collision than before the collision.

• The object m2 has greater momentum after the collision then before the collision.

• Momentum is conserved during the collision.

• Kinetic energy is conserved during the collision.

Tags

NGSS.HS-PS2-2

A truck moves along a frictionless level road at a constant speed. The truck is open on top. A large load of gravel is suddenly dumped into the truck. The velocity of the truck:

• Increases.

• Remains the same.

• Decreases.

• Immediately goes to zero.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

How long must a 60 N net force act to produce a change in momentum of

240 kg-m/s?

• 4 s

• 3 s

• 2 s

• 1 s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

An open cart on a level surface is rolling without frictional loss through a verticle downpour of rain, as shown in the figure. As the cart rolls, an appreciable amount of the rainwater accumulates in the cart. The speed of the cart will

• increase because of conservation of mechanical energy

• decrease because of conservation of momentum

• decrease because of conservation of mechanical energy

• remain the same because the raindrops are falling perpendicular to the direction of the cart's motion

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

An stationary object explodes, into 3 pieces of masses m, m and 3m.  Two pieces fly off at right angles to each another with the same momentum mV, as shown in the diagram. What is the magnitude and direction of the piece of mass 3m?

• V/√3    ↗

• (V√2)/3   ↙

• V/√3    ↙

• (V√2)/3  ↗ 

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Two objects of mass 0.2 Kg and 0.1 Kg, respectively, move in the same direction. The 0.2 Kg object overtakes and collides with the 0.1 Kg object. Immediately after the collision the 0.2 Kg object is travelling 1 m/s upward. What is the y-component of the 0.1 Kg mass immediately after the collision?

• 2 m/s Downward

• 1 m/s Downward

• 1 m/s Upward

• 2 m/s Upward

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A ball of mass 0.4 Kg is initially at rest on the ground.  It is kicked and leaves the kicker's foot at a 60 degree angle above the horizontal at 5 m/s.  The magnitude of the impulse imparted by the foot to the ball is

• 1  1 N * s 

• 2  2 N * s 

• 3  3 N * s

• 4  4 N * s 

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A ball is suspended by a lightweight string, as shown in the figure.   The ball is displaced to position 1 and released. The four labelled positions are evenly spaced along the arc of the ball's motion.  
Between which adjacent pairs is the gain in kinetic energy the greatest?

• 1 and 2

• 2 and 3

• 3 and 4

• They are all equal

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5