Physics Waves And Oscillations Level: High School
Simple Pendulum
The diagram at “Click here “shows a simple pendulum consisting of a mass M suspended by a thin string , The magnitude of the tension is T . The mass swings back and forth between -+ theta 0 .a) The vertical component of tension is constant .
b) T is largest at the bottom (theta = 0)
c) T = Mg at theta = 0
d) T is smallest when theta = -+ theta 0
d) T depends on theta
Physics Work,Power & Energy Level: High School
Select which one of the following statement are true .a) The power required to lift a mass does not depend on the speed at which the mass is raised .
b) The work required to lift a mass one meter does not depend on the speed at which mass is raised .
c) Net work can be done on an object without changing it’s kinetic energy .
d) The work done by a constant force acting on an object depends on the orientation of the force relative to the motion of the object .
e) Conservation of energy means that the mechanical energy can never change .
Physics Heat & Thermodynamics Level: High School
Choose all correct statements .a) A copper plate has a hole cut in its corner . When the plate is heated , the hole gets smaller .
b) When the pendulum of a grandfather clock is heated, the clock runs more slowly.
c) When the Celsius temperature doubles , the Kelvin temperature doubles .
d) When heat is added to a system , the temperature must rise .
Physics Work,Power & Energy Level: High School
Vertical Circle
A stone of mass 15.50 kg is attached to a strong string and whiled in vertical circle of radius 60 cm. At the exact top of the path , the tension in the string is 3.7 times the stone’s weight . What is the speed of the stone at this position (top of its path ) ?a) 3.95 m/s
b) 5.26 m/s
c) 6.99 m/s
d) 9.30 m/s
e) 1.24 x 10^-1 m/s
Physics Force & Laws Of Motion Level: High School
Friction
A small box of mass m is stacked on top of a large box of mass 3 m . The surface between the large box and the horizontal surface on which it slides its smooth (frictionless) and the surface between the two boxes is rough ( there is friction) . The small box does not slide when a horizontal force is applied to the large box . Which statement about the boxes are true ?a) The net force on box 3 m is ½ F
b) The velocity of both boxes will increase
c) The acceleration of box 3m is (¼) F/m
d) If the force stops acting , the boxes will stop instantly .
e) The fore that causes the acceleration of box m is tension
Physics Kinematics Level: High School
Free Fall
Ball A is dropped from the top of the building . One second later , ball B is dropped from the same building , Consider the balls while they are both in flight . You may ignore air resistance . Which statement are true about this situation ?a) Both balls will hit the ground simultaneously .
b) The difference between their velocities increases .
c) The difference between their acceleration increases .
d) The distance between them stays constant .
e) Both are under the influence of gravity only .
Physics Kinematics Level: High School
One dimensional Motion
You observe that a falling stone takes 0.45 s to pass a window that is 1.10 m tall . What is the speed of the stone as it reaches the bottom of the window ?a) 2.48 m/s
b) 2.90 m/s
c) 3.40 m/s
d) 3.97 m/s
e) 4.65 m/s
Physics Properties Of Matter Level: High School
Archimedes’s Principle A fisherman and his young niece are in a boat on a small pond . Both are wearing life jackets . The niece is holding a large floating helium filled balloon by a string . Consider each action below independently , and indicate which actions leave the level of the water in the pond unchanged .
a) The niece gets in the water , loses her grip on the string , letting the balloon escape upwards .
b) The fisherman lowers himself in the water and floats
c) The niece pops the balloon
d) The fisherman drinks water from the pond
e) The fisherman knocks the tackle box overboard and its sinks to the bottom .
Physics Waves And Oscillations Level: High School
Speed of Sound
Two pipes are each open only one end . Both pipes have a fundamental frequency of 486 Hz at 25C , but one of the pipes is warmer than the other right now . If the two pipes are sounded together , you hear a beat frequency of 9.60 Hz . What is the temperature of the warmer pipe ?a) 2.51 x 10^1 C
b) 3.64 x 10^1 C
c) 5.28 x 10^1 C
d) 7.65 x 10^1 C
e) 1.11 x 10^2 C
Physics Waves And Oscillations Level: High School
Simple Harmonic Motion
If a mass of 700.0 g is hung from the bottom of a vertical spring , the spring will stretch 22.0 cm . The mass is then pulled an additional distance of 13.0 cm from its equilibrium position and released . What is the period of oscillation of this mass / spring system ?a) 5.77 x 10^-1 s
b) 6.52 x 10^-1 s
c) 7.37 x 10^-1 s
d) 8.33 x 10^-1 s
e) 9.41 x 10^-1 s
Physics Properties Of Matter Level: High School
Gases
A child’s helium-filled balloon escapes at a sea level and 20.0 degree C . When it reaches an altitude of 2900 m where the temperature is 4.50 degree C and the pressure only 0.720 atm , what is the ratio of the new volume to the original volume at sea level ?a) 7.02
b) 8.21 x 10^-1
c) 9.61 x 10^-1
d) 1.12
e) 1.32
Physics Heat & Thermodynamics Level: High School
The temperature of an ideal monatomic gas increases from 2 degree C to 4 degree C while remaining at constant pressure . Which of the following statements are true about the gas ?a) Heat must be taken from the gas
b) The gas does not work
c) The internal energy does not change
d) The volume decreases slightly
e) On a PV diagram , this process would be a horizontal line .
Physics Work,Power & Energy Level: High School
As your friend the skateboarder is in the middle of moving up a curved ramp , which of the following statements are true ? (All statements apply to the magnitudes of velocity , acceleration and force )a) Your friend’s acceleration is decreasing .
b) The normal force on your friend is decreasing .
c) The net force on you friend is zero .
d) You friend’s velocity is decreasing .
e) The gravitational force on your friend is constant .
Physics Work,Power & Energy Level: High School
Conservation of Energy
A lead ball (specific heat = 1.3 x 10^2 J/kg degree C) , at an initial temperature of 25 degree C , is released from a height of 92.0 m . It does not bounce when it hits a hard surface . If all the energy of the fall goes into heating the lead , find the temperature (in degrees C ) of the ball after its hits .a) 2.40 x 10^1 C
b) 3.19 x 10^1 C
c) 2.45 x 10^1 C
d) 5.65 x 10^1 C
e) 7.51 x 10^1 C
Physics Waves And Oscillations Level: High School
When you slosh the water back and forth in a tub at just the right frequency , the water alternatively rises and falls at each end , remaining relatively calm at the center . Suppose the frequency to produce such a standing wave in 59.2 cma) 6.67 x 10^-1 m/s
b) 7.54 x 10^-1 m/s
c) 8.52 x 10^-1 m/s
d) 9.63 x 10^-1 m/s
e) 1.09 x 10^-1 m/s
