WorksheetsScience 9 Physics Test
Total questions: 60
Worksheet time: 1hrs 12mins
1. As a projectile moves up, ___________.
Its velocity and acceleration decreases
Its velocity and acceleration remains constant
Its velocity while its acceleration decreases
Its velocity decreases while its acceleration remains constant
At the highest point of the trajectory of a projectile, which quantity is zero?
Velocity
Acceleration
Vertical component of velocity
Horizontal component of velocity
A monkey is sitting at the top of a tree 20 m high from the ground level. A person standing on the ground wants to feed the monkey. He uses a bow and arrow to launch the food to the monkey. If the person knows that the monkey is going to drop from the tree at the same instant that the person launches the food, how should the person aim the arrow containing the food?
He should aim it at the monkey.
He should aim it below the monkey.
He should aim it above the monkey.
None of the other choices is correct.
A ball rolls over the edge of a table with a horizontal velocity v m/s. The height of the table is 1.6 m and the horizontal range of the ball from the base of the table is 20 m. What is the magnitude and direction of the ball's acceleration right after it leaves the table?
4.9 m/s2 downward
19.6 m/s2 downward
0 m/s2 downward
9.8 m/s2 downward
A hockey puck slides off the edge of a table with an initial velocity of 20 m/s. The height of the table above the ground is 2.0 m. What is the acceleration of the puck just before it touches the ground?
20 m/s2
4.9 m/s2
19.6 m/s2
9.8 m/s2
A ball rolls off the edge of a table. The horizontal component of the ball's velocity remains constant during its entire trajectory because
the ball is not acted upon by any force.
the net force acting on the ball is zero.
the ball is not acted upon by a force in the horizontal direction.
None of the other choices is correct.
An athlete throws a ball with a velocity of 40 m/s at an angle of 20° above the horizontal. Which of the following statements is true in this case?
The vertical component of the velocity remains constant.
The horizontal component of the velocity changes.
The vertical component of the velocity changes sign after the ball attains its maximum height.
The horizontal component of the velocity changes sign after the ball attains its maximum height.
A bullet is fired from ground level with a speed of 150 m/s at an angle 30° above the horizontal at a location where g = 10.0 m/s2. What is the vertical component of its velocity when it is at the highest point of its trajectory?
0 m/s
75 m/s
130 m/s
150 m/s
A projectile is thrown 30° above the horizontal. What happens to its acceleration as it moves upward?
It decreases because its velocity is directed upward
It increases because its velocity is directed upward
It decreases because its velocity is decreasing
It remains the same.
A volleyball is served at a speed of 8.0 m/s at an angle 35° above the horizontal. What is the speed of the ball when received by the opponent at the same height?
4.0 m/s
8.0 m/s
9.8 m/s
16.0 m/s
A Batang Pinoy athlete from your school throws a javelin, always at the same speed, at four different angles (30°, 40°, 60°, and 80°) above the horizontal. Which two throws cause the javelin to land the same distance away?
30° and 80°
40° and 80°
30° and 60°
40° and 60°
For general projectile motion, which statement is true when the projectile is at the initial and final points of the parabolic path?
The magnitude of the x and y components of its velocity are same at both points.
The magnitude of its x component of velocity at the initial point is smaller than its magnitude of the y component of velocity at the final point.
The magnitude of its x component of velocity at the initial point is bigger than its magnitude of the y component of velocity at the final point.
The velocity components are zero at both points.
A bowling ball accidentally falls out of the cargo bay of an airliner as it flies along in a horizontal direction. As observed by a person standing on the ground and viewing the plane as in the figure at right, which path would the bowling ball most closely follow after leaving the airplane?
A
B
C
D
In the table above, what is the momentum of the jeepney?
6,000 kg•m/s
40,000 kg•m/s
20,000 kg•m/s
3,000 kg•m/s
Which has greater momentum, the jeepney or the motorcycle?
Jeepney
Motorcycle
Both have the same momentum
Cannot be determined
Two identical cars are travelling along EDSA. Which of the two cars would have a greater momentum?
The slower car
The faster car
Both have the same momentum
Cannot be determined
A bus and a car are travelling along EDSA having the same velocity. Which of the two vehicles would have a greater momentum?
The bus
The car
Both have the same momentum
Cannot be easily determined
The impulse experienced by a body is equal to the change in its:
Velocity
Kinetic Energy
Momentum
Potential Energy
In certain martial arts, people practice breaking a piece of wood with the side of their bare hand. Use your understanding of impulse to explain how this can be done without injury to the hand.
Given the same change in momentum, when the time interval is smaller the impact force is bigger.
Given the same change in momentum, when the time interval is bigger the impact force is bigger
Given the same change in momentum, when the time interval is smaller the impact force is smaller.
Given the same change in momentum, when the time interval is bigger the impact force is bigger
Two objects collide and stick together. Which of the following is false?
Momentum is conserved
Kinetic Energy is conserved
Kinetic Energy is lost
Momentum is lost
A ball collides with a second ball at rest. After the collision, the first ball comes to rest and the second ball moves off at the speed of the first ball. In this collision
total kinetic energy is not conserved.
total momentum is conserved but total kinetic energy is not conserved
total momentum is not conserved but total kinetic energy is conserved.
total momentum and total kinetic energy are conserved and the masses are equal.
In any collision
total momentum is not conserved
total kinetic energy is conserved
total momentum is conserved
total momentum is not conserved but total kinetic energy is conserved
Two billiard balls approach each other at equal speed. If they collide in a perfectly elastic collision, what would be their velocities after collision?
Zero
Same in magnitude and direction
Same in magnitude but opposite in direction
Different in magnitude and opposite in direction
Two 0.5 kg balls approach each other with the same speed of 1.0 m/s. What is the total momentum of the system before collision?
0 kg•m/s
0.50 kg•m/s
1.0 kg•m/s
-1.0 kg•m/s
Two 0.5 kg balls approach each other with the same speed of 1.0 m/s. If there is no external acting on the system, what is the total momentum of the system after collision?
0 kg•m/s
0.50 kg•m/s
1.0 kg•m/s
-1.0 kg•m/s
Which of the following energy transformation occurs when a battery is used in a flashlight?
light-chemical-thermal
chemical-electrical-thermal
chemical-thermal-light
chemical-electrical-light
What source of energy supplies the energy needed by photovoltaic cells?
Geothermal
Solar
Biomass
Hydroelectric
To save energy at home, which of the following should you do?
Use fluorescent lamps instead of incandescent bulbs
Open windows to allow natural ventilation
Iron clothes in bulk, not individually
All of the above
When the pendulum bob swings back and forth, energy is converted from kinetic to potential and vice versa. At what point in its motion does the bob possess greatest potential energy?
A
B
C
D
Which of the following gives the correct order of energy transformation in a burning candle?
Thermal – Radiant – Chemical
Chemical – Thermal – Radiant
Chemical – Radiant – Thermal
Thermal – Chemical – Radiant
A physics book and a chemistry book of equal mass are piled up so that the physics book rests over the chemistry book. Which of the following statements is correct?
The physics book has more KE than the chemistry book.
The physics book has more PE than the chemistry book.
The two books have the same PE and KE.
The chemistry book is doing work on the chemistry book.
The acceleration due to gravity on the moon’s surface is 1/6 that of the acceleration due to gravity on earth’s surface. If you walk at 1 m/s on a flat moon’s surface, just as you walk here on the earth, which of these statements is correct?
Your KE on earth is less than your KE on moon
Your KE on earth is more than your KE on moon
Your PE on earth is less than your PE on moon
Your PE on earth is more than your PE on moon
An object falls freely from a certain height.
Which of the following happens to the object?
Loses PE and gains KE
Gains PE and loses KE
Loses both PE and KE
Gains both PE and KE
An object falls freely from a certain height.
The PE of the object at the highest point compared to its KE at the lowest point is ____________.
lesser
equal
greater
not related
An object falls freely from a certain height.
The total mechanical energy of the object at the highest point compared to its total mechanical energy at the lowest point is _____________.
lesser
equal
greater
not related
An object lifted to a height of 5 meters gained 1000 J of potential energy. Then, it is allowed to freely fall. What is its kinetic energy when it hits the ground?
0 J
5000 J
10000 J
50000 J
A 1.0 kg ball rolling with a speed of 2 m/s has a kinetic energy equal to __________.
1 J
4 J
2 J
8 J
Four identical beakers, I,II,III,IV are placed on a large electrical hotplate. I and II are half-full and III and IV are full of tap water at the same initial temperature. I and IV are placed on the hot plate for 2.5minutes, III is left on for 5minutes, and II is left on 10minutes. The water does not boil in any of the beakers.
• Beaker I, half-filled with water on hot plate for 2.5 minutes
• Beaker II, half-filled with water on hot plate for10minutes
• Beaker III, full of water on hot plate for 5 minutes
• Beaker IV, full of water on hot plate for2.5 minutes
Which one of the bakers of water will receive the most heat?
I
II
III
IV
Four identical beakers, I,II,III,IV are placed on a large electrical hotplate. I and II are half-full and III and IV are full of tap water at the same initial temperature. I and IV are placed on the hot plate for 2.5minutes, III is left on for 5minutes, and II is left on 10minutes. The water does not boil in any of the beakers.
• Beaker I, half-filled with water on hot plate for 2.5 minutes
• Beaker II, half-filled with water on hot plate for 10minutes
• Beaker III, full of water on hot plate for 5 minutes
• Beaker IV, full of water on hot plate for 2.5 minutes
Which one of the beakers of water will have the lowest temperature right after being heated?
I
II
III
IV
What is the correct sequence of four cycle-stroke of gasoline engine?
1. Intake
2. Power
3. Exhaust
4. Compression
1, 2, 3, 4
1, 4, 2, 3
2, 3, 4, 1
1, 3, 4, 2
An ideal gas is compressed without allowing any heat to flow into or out of the gas. What will happen to the temperature of the gas in this process?
The temperature increases since no heat flows during the process.
The temperature decreases since heat flows during the process.
The temperature remains the same since heat flows in and out on the process.
The temperature could not be determined since heat is absorbed during the process.
Is it possible to change the temperature of a glass of water by stirring the water, even though the glass is insulated from its surroundings?
No, stirring will not affect the temperature of the water.
No, insulation prevents the change of temperature of the water.
Yes, stirring the water increases its internal energy causing the increase of its temperature.
Yes, stirring the water decreases its internal energy causing the decrease of its temperature.
Mang Fermin, a carpenter, is planning a piece of wood with his planar. After how many minutes, he observed that it is hot. What is the evidence that there is heat transfer?
It is not evident.
Hotness means there is an increase in the temperature.
Yes, hotness means there is a decrease in the temperature.
No, hotness is not related to a change in temperature.
Why is heat engine not 100% efficient?
Because all mixture of gases is converted into work.
Because an engine needs to be cooled down.
All of the gases are used up by the engine.
Some of the gases is taken up in the piston.
What is the efficiency of a gasoline engines that receives 192.75J of energy from combustion and lose 125.25 J by heat to exhaust during one cycle?
36%
45%
46%
55%
Suppose a steam engine receives steam at 600K. The engine uses part of this thermal energy for work. It exhausts the rest to a condenser at a temperature of 350K. What is the maximum efficiency of this steam engine?
17.11%
41.67%
58.17%
71.43%
What is the function of a heat engine?
It converts chemical energy to mechanical energy.
It converts thermal energy to mechanical energy.
It converts mechanical energy to chemical energy.
It converts thermal energy into chemical energy.
The major performance gain of an absorption refrigeration system is:
Replacing a vapor compressor with a liquid pump.
The use of a regenerator between the generator and absorber.
Heating of the generator with an external heat source.
Cooling of the absorber with an external energy sink.
A heat pump, _____________.
extracts energy at low temperature heat source.
gives energy to high temperature heat source
both of the mentioned
none of the mentioned
Which of the following is true for a heat pump and a refrigerator?
a refrigerator removes heat to achieve cooling
a heat pump supplies heat at high temperature
both of the mentioned
none of the mentioned
Which is true in the statement?
Non-spontaneous process happens when heat flows from lower temperature to higher temperature. It does not need mechanical energy to occur.
Non-spontaneous process happens when heat flows from higher temperature to lower temperature. It needs mechanical energy to occur.
Non-spontaneous process happens when heat flows from lower temperature to higher temperature. It needs mechanical energy to occur.
Non-spontaneous process happens when heat flows from same temperature.
In thermal power plant, turbine is placed __________.
before boiler.
after generator.
in between boiler and generator.
any of the above
In a refrigeration system, the expansion device is connected between the _____________.
Compressor and condenser
Condenser and receiver
Receiver and evaporator
Evaporator and compressor
Electric power is greatest when _______________.
Converted energy is high in a short period of time.
Converted energy is high in a long period of time.
Converted energy is low in a short period of time.
Converted energy is low in a high period of time.
Shayne turned on a lamp switch in her room. Which of the following is the correct path of electrical power that can be traced back to the source?
power plant >transmission substations > distribution substations >residences
transmission substations >power plants >residences >distribution substations
residences >distribution substations >power plants >transmission substations
distribution substations >transmission substations >power plants >residences
Electrical energy that we consume is expressed in what unit?
Watts
kilowatts
kilowatt-hour
volts
What energy transformation takes place in a generator?
electrical to mechanical
heat to mechanical
mechanical to electrical
chemical to mechanical
All of the following power plants use steam to drive the turbines to produce electricity EXCEPT:
hydropower
geothermal
coal-fired
nuclear
Last month, Ms. Alcantara’s electric meter reads 8765 kWh. How much will she pay for power generation if the charge of electric company per kWh is 6.88 pesos and her electric meter reads 9975 this month?
₱ 8765.00
₱ 8324.80
₱ 1210.00
₱ 3457.42
Carlo paid ₱1250.00 for electric bill. How much energy (in kWh) is consumed if the electric company charges ₱6.88/kWh?
186.81
181.69
188.61
181.86
