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Honors Physics Semester 2 Exam Review

Total questions: 45

Worksheet time: 53mins

Name
Class
Date
1.

Forces acting on a person standing on the floor.

a)
gravity only
b)
normal only
c)
push and gravity
d)
normal and gravity
2.
What is Newton's second law?
a)
∑F=m*a
b)
∑F=m/a
c)
m*a=a*m
d)
F₁=g*m*a
3.
Two cars crash head on. What is the force acting on car 1 if the force acting on car 2 is 50,000N?
a)
500,000N
b)
50,000N
c)
5,000N
d)
25,000N
4.
What is Power?
a)
P=x*t/m
b)
P=t/m
c)
P=t/E
d)
P=E/t
5.
If you throw a baseball straight up, what is its acceleration at the highest point?
a)
-9.8 m/s2
b)
-9.8 m/s
c)
0 m/s2
d)
0 m/s
6.
If I throw a crayon straight up at 12 m/s, how fast is its velocity when I catch it at the same height?
a)
-6 m/s
b)
-12 m/s
c)
-18 m/s
d)
-24 m/s
7.
If you throw a baseball straight up, what is its velocity at the highest point?
a)
9.8 m/s2
b)
9.8 m/s
c)
0 m/s2
d)
0 m/s
8.
What is a force that works AGAINST MOTION?
a)
Force
b)
Motion
c)
Gravity
d)
Friction
9.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
10.
What is the net force?
a)
5000 N right
b)
4000 N right
c)
40 N left
d)
4000 N left
11.
A box is moving to the left up a ramp. Which way is the force of friction pointing?
a)
down the ramp to the right
b)
up the ramp to the left
c)
there is no friction
d)
straight up
12.
A cannonball with a mass of 0.5 kg is flying at an acceleration of 10 m/sec/sec. What is it's force?
a)
50 Newtons
b)
5 Newtons
c)
20 Newtons
d)
9.5 Newtons
13.
What is the acceleration of an object traveling at a constant velocity?
a)
10 m/s2
b)
0 m/s2
c)
250 m/s2
d)
20 m/s2
14.
Assuming both objects are at rest, which object is more massive? M1 or M2?
a)
M1 is more massive
b)
M2 is more massive
c)
both M1 and M2 are the same mass
15.

Which of the following is the best expression for the Normal Force?

a)

FN = mg cos(ϴ)

b)

FN = mg sin(ϴ)

c)

FN = mg tan (ϴ)

16.
A hockey puck slides on ice at a constant velocity. What is the net force acting on the puck?
a)
Zero
b)
Equal to its weight
c)
Less than its weight but greater than zero
d)
Depends on the speed of the puck
17.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
18.

What is a black hole?

a)

A collapsed planet

b)

A collapsed star

c)

A type of galaxy

d)

A giant gas cloud

19.

What determines the strength of a gravitational field?

a)

Distance and time

b)

Mass and distance

c)

Speed and direction

d)

Shape and size

20.

Why do astronauts appear to "bounce" on the Moon?

a)

The Moon has no gravity

b)

The Moon's gravitational field is weaker than Earth's

c)

Their spacesuits are springy

d)

They are weightless

21.

What happens to objects within a black hole's event horizon?

a)

They orbit the black hole

b)

They escape the gravitational force

c)

They are pulled into the black hole

d)

They reflect light

22.

What force is responsible for pulling objects toward one another?

a)

Magnetic force

b)

Gravitational force

c)

Electrostatic force

d)

Anti-gravity force

23.
A particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?
a)
A
b)
B
c)
C
d)
D
24.
What is the direction of the velocity at point B, if the ball is revolving clockwise?
a)
up
b)
right
c)
down
d)
left
25.
The velocity is always _____ to the line of a circle. 
a)
outwards
b)
towards the center
c)
tangent
d)
faster
26.

A 3.0 N centripetal force acts on a toy car, if the car's mass is doubled then the force is...

ΣFnet = mv2r\Sigma F_{net}\ =\ \frac{mv^2}{r}  

a)

3.0 N

b)

6.0 N

c)

9.0 N

d)

1.5 N

27.

If the uniform speed of a body moving in a circle with a uniform speed is doubled, its centripetal acceleration becomes:

a)

Twice

b)

Three times

c)

Four times

d)

half

28.

How can you find the distance around a circle?

a)

2πr

b)

d/t

c)

v2

d)

T

29.
If an object is at rest on an inclined plane, which of the following forces is greatest?
a)
Normal Force
b)
Friction
c)
Weight
d)
Both Normal Force and Weight are equal, so they both are the greatest.
30.
If both boxes are at rest in the picture above, what other force is equal to the tension in the string?
a)
(M1)(g)sin28⁰
b)
(M1)(g)cos28⁰
c)
(M2)(g)sin28⁰
d)
(M2)(g)cos28⁰
31.

Two masses are connected by a string which goes over an ideal pulley as shown in Figure 6-12. Block A has a mass of 3.00 kg and can slide along a smooth plane inclined 30.0° to the horizontal. Block B has a mass of 2.00 kg. What is the acceleration of mass B?

a)

0.981 m/s2 downward

b)

0.981 m/s2 upward

c)

1.86 m/s2 downward

d)

1.86 m/s2 upward

32.

If F is force, k is spring constant and x is extension, Hooke's Law tells us that:

a)

F=k/x

b)

x=Fk

c)

k=Fx

d)

F=kx

33.

Which statement most accurately represents Hooke's Law?

a)

The stretch of a spring is directly proportional to the force applied.

b)

The stretch of a spring is proportional to the number of coils.

c)

The stretch of a spring is inversely proportional to the force applied.

d)

Thickness of a spring wire is proportional to the force applied.

34.

An Atwood’s machine is set up by suspending two blocks connected by a string of negligible mass over a pulley, as shown above. The blocks are initially held at rest and then released at time t =0 s. The speed of the 3 kg block at time t = 2.0 s is most nearly

a)

2.0 m/s

b)

4.0 m/s

c)

7.0 m/s

d)

10.0 m/s

35.

Block A has a mass of 3.20 kg and rests on a smooth table and is connected to block B, which has a mass of 2.20 kg, after passing over an ideal pulley, as shown. Block B is released from rest. How long does it take block B to travel 80.0 cm?

a)

0.404 s

b)

0.494 s

c)

0.633 s

d)

0.785 s

36.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
37.
A dog sits 1.5 m from the center of a merry-go-round. The merry-go-round is set in motion, and the dog’s tangential speed is 1.5 m/s. What is the magnitude of the dog’s centripetal acceleration?
a)
3.9 m/s^2
b)
2.8 m/s^2
c)
1.5 m/s^2
d)
11.5 m/s^2
38.

As the car goes around the curve, the centripetal force is directed--

a)

toward the center of the circular curve

b)

away from the center of the circular curve

c)

tangent to the curve in the direction of motion

d)

tangent to the curve opposite the direction of motion

39.
The force that is necessary to keep the bucket swinging in a circle is called the:
a)
tangential velocity
b)
centrifugal force
c)
centripetal force
d)
the force of gravity
40.

At point P, he car hits an area of ice and loses all frictional force on it tires. Which path does the car follow on the ice?

a)

A

b)

B

c)

C

d)

D

41.
What type of friction is not moving?
a)
static
b)
sliding
c)
fluid
d)
rolling
42.

A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50.What is the magnitude of the frictional force that acts on the block?

a)

5 N

b)

8 N

c)

2 N

d)

0 N

43.
How does friction affect speed?
a)
more friction decreases speed
b)
more friction increases speed
c)
less friction decreases speed
44.

A 0.50 kg puck sliding on a horizontal shuffleboard court is slowed to rest by a frictional force of 1.2 N. What is the coefficient of kinetic friction between the puck and the surface of the shuffleboard court?

a)

0.24

b)

0.42

c)

0.60

d)

4.1

45.

Static friction acts on _______ while kinetic friction acts on _________

a)

objects at rest; objects in motion

b)

objects in motion; objects at rest

c)

objects with a large mass; objects with a small mass

d)

objects that accelerate; objects at rest

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