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semester 2 review quiz Flashcards | StudBud
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semester 2 review quiz
semester 2 review quiz
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1
A wave with a high frequency has:
Short wavelength and low energy
Long wavelength and high energy
Long wavelength and low energy
Short wavelength and high energy
2
What is the approximate range of a projectile launched at an angle of 45° with an initial speed of 30 m/s?
183.5 m
45.87 m
91.74 m
22.94 m
3
A projectile is launched with an initial velocity of 25 m/s at an angle of 60°. What is the max height of projectile
11.94 m
1.28 m
23.87 m
47.74 m
4
What is thermal energy?
The total kinetic energy of particles in a substance
The energy transferred as waves
The energy of motion
The energy stored in the bonds of molecules
5
A lever is a simple machine that utilizes a ____ to multiply force or change the direction of force.
Fulcrum
Inclined plane
Wedge
Pulley
6
Which of these is a vector quantity?
Distance
Velocity
Time
Speed
7
A car travels 60 kilometers in 2 hours. What is its average speed?
60 km/h
120 km/h
30 km/h
20 km/h
8
A first-class lever has the fulcrum located:
Between the effort and the load
At one end, with the load at the other
Anywhere along the lever arm
At one end, with the effort in the middle
9
Why does a hockey puck slide on ice for a relatively long time after being hit?
Because there is little friction. (related to Newton's First Law)
Because it has a lot of energy.
Because it's round.
Because of gravity
10
A rocket launching into space is propelled forward due to:
Friction
The expulsion of gases (Newton's Third Law)
Gravity
Inertia
11
A 5 kg object is subjected to a force of 20 N. What is the acceleration of the object?
25 m/s²2
4 m/s²
100 m/s²
0.25 m/s²
12
Which simple machine would be most useful for lifting a heavy object a short distance?
Inclined plane
Lever
Pulley
Screw
13
What is speed?
How far something travels.
The distance traveled in a specific direction.
How far something travels per unit of time
How quickly something changes speed.
14
A force of 10 N is applied to a 2 kg object. What is the net force acting on the object if the frictional force is 3 N?
3 N
7 N
13 N
10 N
15
Specific heat capacity is:
The rate at which heat is transferred.
heat required to raise the temperature of 1 kg of a substance by 1°C.
The temperature at which a substance changes state.
The total thermal energy of a substance.
16
An object will float if its average density is:
Greater than the density of the fluid.
It depends on the shape of the object.
Equal to the density of the fluid.
Less than the density of the fluid.
17
Which of the following is NOT a simple machine?
Computer
Pulley
Lever
Screw
18
Which of the following is NOT a fluid?
Oil
Water
Air
Ice
19
A stone is thrown upwards with an initial velocity of 20 m/s. How long will it take to reach its maximum height?
1.02 s
2.04 s
0.51 s
4.08 s
20
Surface tension is a result of:
Gravity
The cohesive forces between liquid molecules.
The viscosity of the liquid.
The adhesive forces between liquid and solid molecules.
21
Radiation is the transfer of heat through:
Movement of fluids
Electromagnetic waves
Direct contact
Solid materials
22
If an object is at rest, its velocity is:
Decreasing
Increasing
Zero
Constant but not zero
23
What is wave frequency?
The time it takes for one complete wave cycle to pass a point.
The distance between two consecutive crests or troughs.
The height of a wave from its equilibrium position.
The number of wave cycles that pass a point in one second.
24
Conduction is the transfer of heat through:
Empty space
Fluids
Electromagnetic waves
Direct contact
25
Acceleration is a change in
Velocity
Distance
Time
Speed
26
Pressure in a fluid at rest is:
Dependent on both depth and density of the fluid.
Independent of depth and density.
Only dependent on depth.
Only dependent on the density of the fluid.
27
A submarine controls its buoyancy by:
Changing its weight.
Changing its shape.
Changing its speed.
Changing the amount of water it displaces.
28
Which of the following is NOT a method of heat transfer?
Radiation
Conduction
Convection
Transformation
29
If a wave completes 10 cycles in 2 seconds, what is its frequency?
5 Hz
10 Hz
20 Hz
2 Hz
30
Which of the following has the highest frequency?
Radio waves
Microwaves
Infrared waves
X-rays
31
If a car is accelerating, which of Newton's Laws is most directly involved?
Newton's Third Law
All of the above
Newton's Second Law
Newton's First Law
32
A ball is thrown horizontally from a height of 20 m. How long will it take to hit the ground? (Use g = 9.81 m/s²)
4.04 s
1.01 s
0.51 s
2.02 s
33
What is heat?
A form of potential energy
The temperature of an object
The transfer of thermal energy from one object to another
The total thermal energy of an object
34
The equation that represents Newton's Second Law is:
a = F/m
F = m/a
F = ma
F = a/m
35
As the wavelength of a wave increases, its frequency:
Decreases
Doubles
Remains the same
Increases
36
Which type of electromagnetic wave has the lowest frequency?
Ultraviolet rays
Gamma rays
Visible light
Radio waves
37
The unit for frequency is:
Seconds (s)
Meters (m)
Hertz (Hz)
Meters per second (m/s)
38
Convection is the transfer of heat through:
Direct contact
The movement of fluids
Empty space
Electromagnetic waves
39
The speed of a wave (v) is related to its frequency (f) and wavelength (λ) by which equation?
v = λ/f
v = f/λ
v = f + λ
v = fλ
40
Work, in the physics sense, is defined as:
Any activity that requires effort.
The product of force and distance moved in the direction of the force.
The time taken to complete a task.
The total energy expended during a task.
41
Bernoulli's principle describes the relationship between:
Pressure and velocity in a moving fluid.
Viscosity and temperature.
Pressure and density in a stationary fluid.
Buoyant force and weight.
42
A car is speeding up. Its acceleration is
Negative
Zero
Positive
Constant but not zero
43
An object is thrown vertically upward with an initial velocity of 15 m/s. How high will it rise before coming to a stop?
22.94 m
7.64 m
11.47 m
3.06 m
44
Newton's First Law is also known as the law of:
inertia
Action-Reaction
Gravity
Acceleration
45
A heavier object requires a ________ force to achieve the same acceleration as a lighter object.
Smaller
Larger
Equal
Negative
46
Viscosity is a measure of a fluid's:
Pressure
Density
Resistance to flow
Buoyancy
47
A wedge is a simple machine that is essentially a(n):
Rotating inclined plane.
Modified pulley.
Moving inclined plane.
Combination of levers.
48
Newton's Second deals with
Velocity
Mass
Energy
Momentum
49
What causes the lift on an airplane wing?
The engine thrust.
The lower air pressure above the wing.
The weight of the airplane.
The higher air pressure above the wing.
50
Newton's Third Law states that for every action, there is an equal and opposite:
Velocity
Force of gravity
Acceleration
Reaction
51
Which material is a good insulator of heat?
Aluminum
Copper
Fiberglass
Glass
52
Which material is a good conductor of heat?
Air
Plastic
Wood
Metal
53
Which of these graphs shows the relationship between distance and time for an object moving at a constant speed?
A jagged line.
A curved line.
A straight horizontal line.
A straight diagonal line.
54
A screw is a simple machine that can be considered a:
Combination of a wedge and a lever.
Modified pulley system.
Inclined plane wrapped around a cylinder.
Type of lever
55
A sound wave with a high frequency is perceived as:
Higher pitch
Quieter
Louder
Lower pitch
56
A projectile is launched at an angle of 30° with an initial speed of 40 m/s.
20 m/s
40 m/s
34.6 m/s
0 m/s
57
A simple machine that consists of a grooved wheel with a rope or cable passing over it is called a:
Lever
Inclined plane
Screw
Pulley
58
A car accelerates from rest at a rate of 2 m/s² for 5 seconds. What distance does it cover during this time?
100 m
10 m
50 m
25 m
59
An object at rest will stay at rest
Acceleration
Force of gravity
Velocity
Force
60
. An object is in free fall. If it takes 4 seconds to reach the ground, what is the height from which it fell?
19.62 m
39.24 m
156.96 m
78.48 m
61
A hydraulic lift uses which principle to amplify force?
Bernoulli's Principle
Archimedes' Principle
The principle of floating
Pascal's Principle
62
If an object has constant velocity, its acceleration is
Zero
Changing
Positive
Negative
63
The mechanical advantage of a simple machine is the ratio of:
Distance moved to force applied.
Output force to input force.
Input force to output force.
Work done to force applied.
64
What happens to the temperature of a substance when heat is added?
It stays the same
It fluctuates randomly
It increases
It decreases
65
When you jump, you push down on the Earth, and the Earth pushes back on you with an equal and opposite force. an Ex of:
Newton's First Law
Newton's Third Law
None of the above
Newton's Second Law
66
What is the relationship between frequency (f) and period (T)?
f = 1/T
f = T²
f = 1/T²
f = T
67
What is velocity?
The time taken to travel a distance.
The speed in a specific direction.
The rate at which speed changes.
The total distance covered.
68
A ball is thrown straight up. At its highest point, its velocity is
Maximum
Negative
Zero
Constant
69
An inclined plane reduces the amount of force needed to lift an object by:
Decreasing the distance over which the force is applied.
Eliminating friction.
Changing the direction of the force.
Increasing the distance over which the force is applied.
70
What principle states that the buoyant force on an object is equal to the weight of the fluid displaced by the object?
Pascal's Principle
Bernoulli's Principle
Newton's Third Law
Archimedes' Principle
