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WorksheetsAP Physics Review 4
Total questions: 20
Worksheet time: 22mins
Name
Class
Date
1.
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
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?
How much time does it take for the rock to hit the ground?
a)
√hv
b)
h/√gv
c)
√(h/mg)
d)
√(2h/g)
3.
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
4.
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
5.
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
6.
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
7.
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
8.
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
9.
How much work is done carrying a 10-N box horizontally across a floor for 8 m?
a)
80 J
b)
10 J
c)
8 J
d)
0 J
10.
You do work against gravity when you walk up some stairs.
a)
True
b)
False
11.
The area under a force vs. displacement graph tells you the
a)
mass of the object
b)
momentum of the object
c)
work done on the object
d)
impulse of the object
12.
Which position has the most kinetic energy?
a)
A
b)
G
c)
D
d)
B
13.
Which position has the most potential energy?
a)
A
b)
G
c)
C
d)
D
14.
Coulomb's law says that the force between any two charges depends
a)
inversely on the product of the charges
b)
directly on the square of the distance between the charges
c)
directly on the product of the charges
d)
inversely on the square root of the distance between the charges
15.
Which collision are both momentum and kinetic energy conserved?
a)
Elastic Collisions
b)
Perfectly Inelastic Collisions
c)
Inelastic Collisions
d)
none of the above
16.
The rotational equivalent to d (distance), v (velocity) and a (acceleration) are?
a)
m, m/s, m/s^2
b)
theta, omega (lowecase), alpha
c)
x, x/t, alpha
d)
rho, mu, Omega
17.
The center of mass is:
a)
the exact middle
b)
the heaviest part
c)
the point at which you can balance with one finger
d)
the idea that mass is concentrated throughout
18.
How do you get the maximum torque?
a)
longer lever arm and more force at an acute angle
b)
shorter lever arm with more force perpendicularly
c)
shorter lever arm and more force perpendicularly
d)
longer lever arm with more force perpendicularly
19.
A force F is acting on an object of mass m, giving it an acceleration of a. What is the acceleration if the mass is halved and the force quadrupled?
a)
it is divided by eight
b)
it is multiplied by eight
c)
it is divided by two
d)
it stays the same
20.
Where is the net force when the rollercoaster is at the top of the loop?
a)
Towards the sky
b)
Towards the Right
c)
Towards the left
d)
Towards the ground
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