Physics Kinematics Level: High School
One Dimensional Motion
John is a passenger in a car driving at a constant speed along a busy highway .He notices that there are telegraph poles every 50 in along the side of the road . With his stop watch be measures the time as he passes each pole . His results are summarized in the table below .Distance Time (min: sec)
50 1.6
100 3.6
150 5.2
200 6.2
250 8.6
300 9.8
350 11.5
400 13.7
a) Using the fact that speed = distance/time , plot a graph of distance Vs time and use the graph to find the car’s average speed .
b) John notices a police speed camera during the experiment .If the speed limits is 110 km/hr . is the car speeding ?
Physics Measurements Level: High School
Paddy and Steve makes a new year’s resolution to drink 1 m^3 of their beverage of choice throughout the year .a) Calculate the number of pints that paddy will be drinking , and the number of pots that Steve will have throughout the year . (Quote your answer to four significant figures)
b) If the density of a particular drink is 1.15 x 10^3 kg/m^3 , what is the mass of one pint ? What is its weight ? (Ignore the mass / weight of the glass . )
c) Paddy is an astronaut and makes a trip to the moon during the year . What is the mass , and the weight of one pint of his drink on the moon ? (1 pot = 285 mL , 1 pint = 570 mL , IL = 1000 cm^2 , g = 9.8 ms^-2 , g moon = 1.67 ms^-2)
Physics Heat & Thermodynamics Level: High School
Specific Heat Capacity
Consider two equal mass samples made out of different material. Sample 1 has twice the specific heat capacity of sample 2 . To raise the temperature of the sample 1 from 50 degree C to 72 degree C requires 22 kJ. How many kJ are required to heat sample 2 from 90 degree C to 156 degree C .a) 33 kJ
b) 88 kJ
c) 132 kJ
d) 22 kJ
e) 66 kJ
Physics Properties Of Matter Level: High School
Gas
One way to cool a gas is to let it expand . If a gas at an initial pressure of 44.1 atm and an initial temperature of 27.3 degree C is allowed to expand to 17 times its original volume and reaches a final pressure of 1atm . What is the new temperature of the gas , in degree C ?a) -66.9
b) -69.0
c) -16.3
d) -157.3
e) -209.3
Physics Waves And Oscillations Level: High School
Interference of Sound
Two adjacent sources of sound each emits a frequency of 700 Hx in air where the speed of sound is 340 m/s How much further back ( in meters) would one of the sources have to be moved so that an observer in front of the sources would bear no sound ? (Hint : Think about the interference of sound moves connecting from the two sources )a) 0.130
b) 0.152
c) 0.177
d) 0.266
e) 0.243
Physics Waves And Oscillations Level: High School
Simple Harmonic Motion
A pendulum on earth oscillates with a period T . If this pendulum were taken into the moon, where the gravity is about 6 times weaker than on earth, what characteristic of pendulum must change in order for it oscillate with the same period T ?a) The mass of the pendulum bob must be increased
b) The mass of the pendulum bob must be decreased
c) No change is needed
d) The length of the pendulum must be increased
e) The length of the pendulum must be decreased
Physics Waves And Oscillations Level: High School
Intensity of Sound
A sound is measured to have an intensity level of 120 dB when standing a certain distance D from the source . At what distance from the source would you have to stand to hear half this decibel level , ie , 60 dB ?a) 1000 D
b) 2 D
c) 4 D
d) 60 D
e) 100 D
Physics Waves And Oscillations Level: High School
Simple Harmonic Motion
A block is fastened to a spring whose spring constant is 57.9 N/m . The block and the spring lie on a frictionless , horizontal table . The block is pulled a distance of 99.2 cm from its equilibrium position and released from rest . What is the kinetic energy , in Joules of the block halfway between its equilibrium position and its end point ?a) 21.0
b) 23.8
c) 26.9
d) 30.4
e) 34.3
Physics Properties Of Matter Level: High School
Archimedes’s Principle
An object of a certain material (specific gravity = 4.81) has a volume of 43.2 cubic centimeter and is hanging by a string in a large beaker of pure water , as shown in the figure at ”click here “. What is the tension in the string (in N ) ?a) 1.36
b) 1.43
c) 1.61
d) 1.821
e) 2.06
Physics Rotational Mechanics Level: High School
Rotational Equilibrium
A uniform plank of length 6.80 m and mass 25 kg is resting on two supports , one located at x = 0.0 m and the other located at x = 5.10 m , as shown in the figure at “click here” . A person of unknown mass walks out on the overhang until the plank just begins to tip , at which time the support on the left , ie, the one located at x = 0.0 m , is removed . When this occurs , the person is located at x = 5.78 m , as measured from the x = 0.00 . What is the mass of the person (in kg) ?a) 62.5
b) 90.6
c) 131.4
d) 190.5
e) 376.3
Physics Work,Power & Energy Level: High School
Inelastic Collision
A box of mass 4.1 kg slides on a frictionless surface at a speed of 18.2 m/s , heading towards another box of unknown mass which is at rest . The first box collides identically with the second box and sticks to it , and the two boxes move off together at a speed of 8.1 m/s . What is the mass (in kg) of the second box ?a) 4.5
b) 5.1
c) 5.6
d) 6.5
e) 7.4
Physics Force & Laws Of Motion Level: High School
Conservation of momentum
Sally skywalker is outside the spaceship repairing some hardware , when her safety line to the spaceship mysteriously break . Her thruster pack is also damaged , so she has no obvious means of propulsion . She is at rest relative to the spaceship , 267 m away from it , with only 3 minutes of oxygen left in her life support pack . To get back to the ship , she decided to remove her tool kit . and throw it away . Assuming that the combined mass of the Sallly and the spacecraft is 113 kg and the mass of the tool kit is 9 kg , what is the minimum speed (in m/s) that she can throw the tool kit , in order to get back to the spaceship before her oxygen supply is exhausted ?a) 9.9
b) 11.6
c) 13.6
d) 15.9
e) 18.6
Physics Work,Power & Energy Level: High School
A skier is initially at rest at the top of a tall sky slope with a total energy of 100 J. Exactly halfway down the hill , the skiers kinetic energy is measured to be 40 J . How much energy did the skier lose due to friction in the ski slope ?a) 20 J
b) 80 J
c) 50 J
d) 10 J
e) 60 J
Physics Work,Power & Energy Level: High School
Friction
A roller coaster has an initial speed of 3 m/s at the top of the first hill . which is 44 m above the ground . Neglecting friction , what will be the speed (in m/s ) of the roller coaster at the top of the third hill , which is 24 m above the ground ?a) 17.1
b) 20.1
c) 23.5
d) 27.5
e) 32.1
Physics Work,Power & Energy Level: High School
Friction
You are sitting on your sled at the top of a steep hill . The hill is icy (frictionless) . At the bottom of the hill , the ground is flat and still icy (frictionless) . except for one patch of rough gravel (coefficient of kinetic friction = 0.17 ) that is 5.5 m long . If the vertical height of the hill is 22.9 m . What would be your speed in (m/s) after traveling the gravel patch ?a) 8.08
b) 11.7
c) 15.6
d) 20.7
e) 27.6
