WorksheetsPhysics Quiz
Total questions: 59
Worksheet time: 57mins
A skydiver jumps from an airplane. After 5 seconds, he opens his parachute, causing him to descend at an acceleration of 5 m/s². What was his height when he jumped from the airplane?
125 m
250 m
372.5 m
377.5 m
A stone is shot upward from the ground with an initial speed of 40 meters/second at an angle of 30 degrees to the horizontal. What is the horizontal distance from the starting point where the stone will land?
m3160
m3140
m3100
A stone is thrown with an initial speed of 40 m/s at an angle of 30 degrees to the horizontal. How far from the starting point will the stone land?
m3160
m3140
m3100
m380
A car with mass m moves on a flat road. It is found that when the road is dry, the driver can stop the car in a distance of 10 meters. If the road is wet and the car has a mass of 2m, how far can the driver stop the car if the coefficient of friction is reduced to half of that on a dry road?
10 m
20 m
40 m
80 m
A spring with a mass of 0.25 kg is compressed by 10 cm. After that, it is released. What is the maximum speed that the mass can achieve if the spring constant is 100 N/m?
1.0 m/s
1.4 m/s
2.0 m/s
2.4 m/s
Points A and B are 75 meters apart. If a car accelerates from point A to point B at a constant acceleration of 1 m/s², how long will it take to reach point B?
A car starts from point A to point B, which is 75 meters apart. If the car accelerates from A at a constant speed of 1 m/s² for a while and then brakes at a constant deceleration of 2 m/s² to stop exactly at point B, how long will it take?
12.5 seconds
15.0 seconds
17.5 seconds
20.0 seconds
A mass m is placed on an inclined plane at an angle of 30 degrees to the horizontal, connected to a 10 kg mass by a massless rope over a pulley. If mass m is accelerating upwards at 2.0 m/s² and the coefficient of kinetic friction between mass m and the inclined plane is 0.5, what is the approximate value of mass m?
7 kg
9 kg
10 kg
11 kg
A bullet of mass 5 grams is fired with a speed of 900 m/s horizontally and hits a 1 kg sandbag hanging by a rope. As the bullet passes through the sandbag, the sandbag is found to have a speed of 4 m/s. What is the speed of the bullet as it exits the sandbag?
400 m/s
300 m/s
200 m/s
10
At the moment the bullet passes through the sandbag, it is found that the sandbag has a speed of 4 meters per second. Find the speed of the bullet as it leaves the sandbag.
400 m/s
300 m/s
200 m/s
100 m/s
When a 200-gram ball is released from a height of 125 centimeters onto a flat surface, it is found that after the ball hits the ground for 0.06 seconds, it bounces back up vertically, reaching a maximum height of 80 centimeters. Find the average force exerted by the ground on the ball.
50 N
42 N
30 N
22 N
Two boxes have masses m1 and m2 stacked on a frictionless flat surface. A force F is applied to box m1, causing both boxes to move to the right with acceleration a. If f is the maximum frictional force that can occur between the surfaces of the two boxes, what is the maximum value of F such that mass m2 does not slide on m1?
f * m / m1
f * m / (m1 + m2)
f * m / m2
f * m / (m2 + m1)
A heavy luggage W Newton is lifted by a force F (as shown in the figure). It is found that this luggage moves upward at a constant speed of 5 m/s. If OA and OB are ropes of equal length, what is the tension in rope OA?
2sin(2)Wθ
2cos(2)Wθ
2s
A box is moving upward with a constant speed of 5 m/s. If OA and OB are ropes of equal length, what is the tension in rope OA?
2sin^2(Wθ)
2cos^2(Wθ)
2sin^2(Wθ)
2cos^2(Wθ)
When lifting a mass m from rest with a constant force over a distance h in time T, what is the average power during that time?
T * mgh
T^2 * mgh
(T/h^2) * (T/h^2) * gm/2
(T/h) * (T/h^2) * gm/2
In moving a rectangular block of mass m along a horizontal surface at constant speed v, if person A pulls with force F1 at an angle θ and person B pushes with force F2 at the same angle, what is the ratio of the power used by person B to that used by person A?
1
(1 + μ)/(1 - μ)
(1 - tan(μθ))/(1 + tan(μθ))
(1 + tan(μθ))/(1 - tan(μθ))
According to the diagram, a spring is in a horizontal position. What is the question?
A spring is in a horizontal position with a spring constant of 800 N/m. One end is fixed to a wall, and the other end has a mass M = 480 grams resting on a frictionless surface. When a bullet of mass m = 20 grams is shot horizontally into M, what must the bullet's speed be for the spring to compress by 5 cm?
50 m/s
48 m/s
20 m/s
10 m/s
A ball with a mass of 2.0 kg falls from a height of 1.25 meters and bounces back to a maximum height of 0.45 m after hitting the ground. If the ball is in contact with the ground for 0.1 s, which of the following statements is correct?
The impulse on the ball from the ground is 4.0 N.s
The average force exerted by the ground on the ball is 160.0 N
The ball loses 16.0 J of kinetic energy upon impact
Only option 2 is correct
A satellite of mass m orbits in a circular path around the Earth at a height h from the surface of the Earth. If R is the radius of the Earth, M is the mass of the Earth, G is the universal gravitational constant, and g is the acceleration due to gravity at the surface of the Earth, find the speed of the satellite.
RGM
(hR/g)^(1/2)
h/GM
(hR/gR)^(1/2)
An escalator in a shopping mall can lift 36 people per minute from the ground floor to the second floor, which is 10 m high. If the motor used for the escalator has a power of 4.5 kW and the average mass of a person is 60 kg, find the mechanical efficiency of the motor.
60%
70%
80%
90%
If a particle is moving in simple harmonic motion (S.H.M) with a period of π/3 seconds and an amplitude of 0.5 meters, at time t = 0, the particle is at a displacement of 0 meters. Find the equation of motion of the particle in meters.
x = 2/3 sin(t)
x = 1/2 sin(3t)
x = 1/2 sin(6t)
x = 1/26 sin(t)
A string of length 1 meter is fixed at one end and the other end is attached to a vibrating machine.
A rope 1 meter long is fixed at one end and attached to a vibrating machine at the other end, vibrating at a frequency of 80 Hz. If a standing wave is formed with 4 nodes, what is the speed of the wave in the rope?
20 m/s
27 m/s
40 m/s
53 m/s
From the figure, there is a standing wave in the rope with both ends fixed. If the rope is 90 cm long and the wave speed in the rope is 2.4 x 10^2 m/s, find the frequency of the wave.
200 Hz
267 Hz
400 Hz
800 Hz
Two sources of wave generation are 8 cm apart. If both sources generate waves with the same frequency and a wavelength of 2 cm, how many nodes are formed on the straight line connecting the two sources?
5
7
9
11
A sound is emitted from one area with a certain temperature. It is found that when entering the second area, the temperature changes to another value, and the wavelength measured in this area is half of the first area. What is the temperature in Kelvin of the first area compared to the second area?
0.25
0.50
2
4
Mr. A stands at one edge of the lawn (point A). When the lawn mower is working in the middle of the field (point B), the sound intensity level is measured at 77.34 decibels. If the lawn mower moves to the opposite edge of the field (point C), what will the sound intensity level be?
77.34 dB
71.32 dB
38.67 dB
35.66 dB
A parallel beam (single wavelength) of width L strikes perpendicularly against one side of a triangular prism (refractive index n). As the beam refracts out of the prism's opposite right angle, what will be the width of the beam?
(sin(θ) / sin(θ)) * L
θ * sin(n1) / (θ * cos(L))
What is the width of the light beam when it refracts out of the prism?
sinsinLnθ
θsinn1θcosL22−
cossinLnθ
θθ22sinn1sinL−
What is the distance between the slits in millimeters?
0.05
0.10
0.15
0.20
What will be the period of oscillation of mass m in the electric field E?
q/m2λπ
qE/2λπ
E/2λπ
qE/m2λπ
What is the work done in bringing four point charges of +Q to the apex of a pyramid?
akQ6
akQ4
akQ6/2
akQ4/2
What is the radius of the gears in the mechanical system?
Three gears are engaged in a mechanical system with radii of 10, 20, and 40 cm respectively. If the smallest gear rotates at an angular velocity of 2.0 radians/second, what will be the angular velocity of the largest gear?
0.5 rad/s
1.0 rad/s
1.5 rad/s
2.0 rad/s
A circle rolls down an inclined plane without slipping. When the circle reaches the bottom, what will be its speed compared to the case where the circle slides down the same inclined plane?
2
2
2
2
Argon gas is contained in a cylinder at a certain temperature. When the temperature of the gas increases, which statement is correct?
The heat energy received by the system will remain the same regardless of how the gas volume changes.
The heat energy received by the system will increase when the volume decreases.
The heat energy received by the system will increase when the volume increases.
The heat energy received by the system will be zero.
How will the system change?
The heat energy received by the system will increase when the volume decreases.
The heat energy received by the system will increase when the volume increases.
The heat energy received by the system will be zero when the volume increases.
A heating wire with a power of 1000 watts is immersed in 500 grams of water at 30 degrees Celsius. If there is a heat loss of 30%, how long will it take for the water to start boiling?
2 minutes
3 minutes
3.5 minutes
8 minutes
A car with a mass of 1000 kilograms is traveling at a speed of 108 km/h into a curve with a radius of 100 meters. Find the minimum coefficient of friction between the tires and the road that will prevent the car from skidding off the curve.
0.9
0.8
0.7
0.6
A bullet with a mass of 50 grams is fired at an initial speed of 100 meters/second at an angle of 60 degrees to the horizontal. After 5 seconds, the bullet hits a target on a cliff. How high is the target above the ground level where it was fired?
228.5 meters
308 meters
375 meters
433 meters
A galvanometer has a resistance of one.
What is the height of the target on the cliff?
228.5 meters
308 meters
375 meters
433 meters
If the resistance (Rg) is 900 ohms and the maximum current is 10A, what resistance Rs is needed to allow a current of 100 microamperes?
Rs = 100 ohms in parallel with galvanometer
Rs = 90 ohms in parallel with galvanometer
Rs = 100 ohms in series with galvanometer
Rs = 90 ohms in series with galvanometer
A family uses electrical appliances as follows: a 1000-watt rice cooker for 1 hour, 5 bulbs of 40 watts for 4 hours, a 150-watt television for 4 hours, and a 750-watt iron for 1 hour. If the voltage is 220 volts and the cost per unit is 1.50 baht, how much will the electricity bill be for one month?
94.50 baht
141.75 baht
82.20 baht
61.65 baht
Push the rectangular wire frame PQRS, which has the dimensions specified in the image, towards the long straight wire AB.
A rectangular wire frame PQRS with specified dimensions is pushed towards a long straight wire AB carrying an electric current, with side PQ parallel to AB at all times, while PQ is 1 centimeter away from AB. The magnetic fields induced by AB at wires PQ and RS are 5.0 x 10^-3 and 1.0 x 10^-3 Tesla respectively. If the magnetic force acting on the wire frame is 2.6 x 10^-3 Newton, find the current in wire PQRS in amperes.
4.5 A
5.5 A
6.5 A
7.5 A
Which of the following events does not produce electromagnetic waves?
A charged particle moving at high speed
Electrons of an atom changing energy levels
The nucleus of an atom changing energy levels
An object at high temperature
In Millikan's experiment, how will the charge of a water droplet behave?
It will have the same constant value for all droplets
It will be uncertain and can take any value
It will be uncertain but must always be an integer multiple of a certain value
It will be a prime number that cannot be factored
Which of the following statements is related to Bohr's atomic theory?
What is the starting nucleus if the final nucleus is Pb 206 82 and it decays by emitting 3 particles, 2 of which are the same?
Pb 204 82
Pb 206 82
Pb 208 82
Pb 210 82
If the fission reaction of U – 235 produces 200 MeV of energy per reaction, how many grams of U – 235 are needed to produce 48 MW of power?
2.5 × 10-4
6
ในการผลิตกระแสไฟฟ้า จะต้องใช้สาร U – 235 น้อยอย่างน้อยกี่กรัม
2.5 × 10-4
6 × 10-4
1 × 10-3
5 × 10-3
ในการผลิตกระแสไฟฟ้า จะต้องใช้สาร U – 235 น้อยอย่างน้อยกี่กรัม
2.5 × 10-4
6 × 10-4
1 × 10-3
5 × 10-3
ในการผลิตกระแสไฟฟ้า จะต้องใช้สาร U – 235 น้อยอย่างน้อยกี่กรัม
2.5 × 10-4
6 × 10-4
1 × 10-3
5 × 10-3
ในการผลิตกระแสไฟฟ้า จะต้องใช้สาร U – 235 น้อยอย่างน้อยกี่กรัม
2.5 × 10-4
6 × 10-4
1 × 10-3
5 × 10-3
