AP Physics Unit 2

A rock of mass m is thrown horizontally off the top of a cliff of height h, as shown in the diagram.  The speed of the rock as it leaves the throwers hand is v.
How much time does it take for the rock to hit the ground?

• √hv

• h/√gv

• √(h/mg)

• √(2h/g)

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

A rod on a horizontal tabletop is pivoted at one end and is free to rotate without friction about a vertical axis, as shown in the diagram.  A force F is applied at an angle θ to the rod.  If F were to be applied perpendicular to the rod, at what distance from the axis should it be applied in order to produce the same amount of torque?

• L sin θ

• L cos θ

• L 

• L tan θ

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

A student weighing 700 N climbs at a constant speed to the top of an 8m verticle rope in 10 s.  The average power expended by the student to overcome gravity is most nearly

• 1.1 W

• 87.5 W

• 560W

• 875 W

Tags

NGSS.HS-PS2-4

The electrical resistance between X and Y is

• 3/4 Ω

• 1 1/3 Ω

• 2 Ω

• 4 Ω

The figure above shows two particles, each with a charge of Q+, that are located at the opposite corners of a square with a side d.
What is the direction of the net electric field at point P.

•  ↖

• ↗

• ↘

• ↙

Tags

NGSS.HS-PS2-4

The maximum speed of the electrons emitted by a metal surface when it is illuminated by light depends on which of the following?

• I only

• III only

• I and II only

• II and III only

• all of the above

Tags

NGSS.HS-PS4-3

Two parallel conducting plates are connected to a constant voltage source.  The magnitude of the electric field between the plates is 2000 N/C.  If the voltage is doubled and the distance between the plates is reduced to 1/5 the original distance what is the strength of the new magnetic field

• 1,600 N/C

• 2,400 N/C

• 5,000 N/C

• 20,000 N/C

Tags

NGSS.HS-PS2-4

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