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WorksheetsAP Level Physics
Total questions: 21
Worksheet time: 11mins
Name
Class
Date
1.
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
a)
increase because of conservation of mechanical energy
b)
decrease because of conservation of momentum
c)
decrease because of conservation of mechanical energy
d)
remain the same because the raindrops are falling perpendicular to the direction of the cart's motion
2.
When there is a steady current in the circuit, the amount of charge passing a point per unit of time is
a)
Greater in the 2 Ω resistor than the 3 Ω resistor
b)
greater at point X than at Y
c)
greater in the 1 Ω resistor than the 2 Ω resistor
d)
Greater in the 1 Ω resistor than the 3 Ω resistor
3.
A block of mass 3.0 Kg is suspended from a string, causing it to stretch 12cm before reaching equilibrium, as shown in the image.
The 3.0 Kg block is replaced with a 4.0 Kg block and it is released from the position shown above, at which the spring is unstretched.
How far will the 4.0 Kg block fall before the direction is reversed?
The 3.0 Kg block is replaced with a 4.0 Kg block and it is released from the position shown above, at which the spring is unstretched.
How far will the 4.0 Kg block fall before the direction is reversed?
a)
9 cm
b)
18 cm
c)
24 cm
d)
32 cm
4.
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
a)
1,600 N/C
b)
2,400 N/C
c)
5,000 N/C
d)
20,000 N/C
5.
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?
a)
2 m/s Downward
b)
1 m/s Downward
c)
1 m/s Upward
d)
2 m/s Upward
6.
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
a)
1 1 N * s
b)
2 2 N * s
c)
3 3 N * s
d)
4 4 N * s
7.
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?
How much time does it take for the rock to hit the ground?
a)
√hv
b)
h/√gv
c)
√(h/mg)
d)
√(2h/g)
8.
What is the kinetic energy of the rock just before it hits the ground?
a)
mgh
b)
1/2mv²
c)
1/2mv² - mgh
d)
1/2mv² + mgh
9.
Two parallel conducting plates, separated by a distance, d, are connected to a battery of emf V.
Which of the following is correct if the plate separation is doubled while the battery remains constant?
Which of the following is correct if the plate separation is doubled while the battery remains constant?
a)
The electric charge on the plates is doubled
b)
The electric charge on the plates is halved
c)
The potential difference between the plates is doubled
d)
The potential difference between the plates is halved
10.
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?
a)
V/√3 ↗
b)
(V√2)/3 ↙
c)
V/√3 ↙
d)
(V√2)/3 ↗
11.
.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?
a)
L sin θ
b)
L cos θ
c)
L
d)
L tan θ
12.
A 4μF capacitor is charged to a potential difference of 100V. The electrical energy stored in the capacitor is?
a)
2x10-8 J
b)
2x10-6 J
c)
2x10-4 J
d)
2x10-2 J
13.
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?
Between which adjacent pairs is the gain in kinetic energy the greatest?
a)
1 and 2
b)
2 and 3
c)
3 and 4
d)
They are all equal
14.
A newly discovered planet is found to have 2/3 the density of earth and twice the radius.
The surface planetary gravity is?
The surface planetary gravity is?
a)
1.7 m/s2
b)
3.3 m/s2
c)
6.7 m/s2
d)
13 m/s2
15.
A solid metal ball and a hollow plastic ball of the same external radius are released from rest in a large vacuum chamber. When each has fallen 1m, they both have the same
a)
Speed
b)
Inertia
c)
Change in Potential Energy
d)
Momentum
16.
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
a)
1.1 W
b)
87.5 W
c)
560W
d)
875 W
17.
Three forces act on an object. If the object is in translational equilibrium, which of the following must be true:
i. The vector sum of the three forces must equal zero.
ii. The magnitude of the three forces must be equal.
iii. All three forces must be parallel.
i. The vector sum of the three forces must equal zero.
ii. The magnitude of the three forces must be equal.
iii. All three forces must be parallel.
a)
i only
b)
ii only
c)
i & iii only
d)
i, ii, & iii only
18.
The electrical resistance between X and Y is
a)
3/4 Ω
b)
1 1/3 Ω
c)
2 Ω
d)
4 Ω
19.
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.
What is the direction of the net electric field at point P.
a)
↖
b)
↗
c)
↘
d)
↙
20.
A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of friction between the box and floor is μ.
At what rate does a child do work on the box?
At what rate does a child do work on the box?
a)
μmgv
b)
v/μmg
c)
μmg/v
d)
μmv²
21.
The maximum speed of the electrons emitted by a metal surface when it is illuminated by light depends on which of the following?
a)
I only
b)
III only
c)
I and II only
d)
II and III only
e)
all of the above
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