Physics Waves And Oscillations Level: High School
A body is suspended vertically from and ideal spring of spring constant 2.9 N/m . The spring is initially in its relaxed position . The body is then released and oscillates about its equilibrium position . The motion is described by the following equation .y = (4.0 cm) Sin [(0.67 rad/s) t] What is the maximum kinetic energy of the body ?
Physics Waves And Oscillations Level: High School
Equipment to be used in airplanes or spacecraft is often subjected to a shake test to be sure it can withstand the vibrations that may be encountered during flight . A radio receiver of mass 5.22 kg is set on a platform that vibrates SHM at 101 Hz and with a maximum acceleration of 92 m/s^2 .a) Find the radio’s maximum displacement .
b) Find the radio’s maximum speed .
c) Fid the maximum net force exerted on it .
Physics Waves And Oscillations Level: High School
The prong of a tuning fork moves back and forth when it is set into vibration . The distance the prong moves between its extreme positions is 2.27 mm . If the frequency of the tuning fork is 441.0 Hz , What are the maximum velocity and the maximum acceleration of the prong ? Assume SHM .
Physics Properties Of Matter Level: High School
Elasticity
A large sponge has force of magnitude 14 N applied in opposite direction to two opposite faces of area 42 cm^2 ( see the figure at “click here” ) . The thickness of the sponge (L) is 2.0 cm . The deformation angle (y) is 8.4 degree .a) What is Ax ?
b) What is the shear modulus of the sponge ?
Physics Properties Of Matter Level: High School
An anchor, made of cast iron of bulk modulus 60.0 x 10^9 Pa and of volume 0.219 m^3 , is lowered over the side of the ship to the bottom of the harbor where the pressure is greater than sea level pressure by 1.73 x 10^6 Pa . Find the change in the volume of the anchor .
Physics Force & Laws Of Motion Level: High School
A chain hangs from the ceiling of an elevator with three links as shown .(a). Rind A and C each have about twice the mass of ring B. If the elevator is at rest , draw a force diagram for rings A,B and C in your drawing , circle those forces , which are Newton’s 3rd Law pairs .
(b) Now say the elevator accelerates upward . Would your diagram for B be any different ? If no, explain why not , if yes , explain how it would change ?
(c) If the mass of A is 10 kg and the elevator accelerates upward with a = 2.0 m/sec 2 , Calculate the force of that ring A exerts on B .
Physics Kinematics Level: High School
A block files past your dorm room window (which is 1m tall ) , taking 0.25 to pass . Assuming it was dropped , from what height (above your window) was the book dropped ?
Physics Kinematics Level: High School
At the scene of a highway collision , skid marks stretch out for 90 m away from the collision site . Assuming the deceleration of the of the vehicle was at least 6 m/s^2, estimate the speed of the car before the incident .
Physics Kinematics Level: High School
Projectile motion
You and a friend are taking a walk on a cliff with the ocean 20 m away from the bottom of the cliff . You regularly play baseball and know that the furthest you can throw a ball is 10 m . You throw a baseball-sized rock with all your might and it barely makes it to the water . You tell your friend that you can figure out the height of the cliff but he doesn’t believe you . How could you explain to your friend how to find the height of the cliff ?
Physics Work,Power & Energy Level: High School
If the speed of car is increased by 150 % , (ie, v = 2.5 v) , by what factor will it minimum braking distance be increased , assuming all else is the same ? Ignore the drivers reaction time .
Physics Work,Power & Energy Level: High School
You fire three shots from your gun (lets label the shots A,B,C) One straight up (A) one straight down (B) , and one horizontally (C) . Assume that you shoot from the hip (ie, your hand is in the same place each time, right by your holster ) and you ignore air resistance .(a) Which of the three bullets (A,B or C) will have the greatest speed as it reaches the ground ?
(b) Now include air resistance , how does your answer change and why ?
Physics Work,Power & Energy Level: High School
Conservation of energy
Your car runs out o fuel on a deserted highway . As you car slows to a stop you wonder what happened to all of Kinetic Energy that it just had . Where did this energy go ? Was the total energy conserved ? Explain .
Physics Heat & Thermodynamics Level: High School
Determine the latent heat of vaporization of unknown substance X in kcal/g if 3.0 g of boiling liquid X are completely vaporized in 1.5 hours by an energy source of 10 k cal/h .
Physics Heat & Thermodynamics Level: High School
Two spheres , labeled A and B , have identical masses , but are made of different substances . The specific heat capacity of sphere A is 440 J / kg degree C and that of sphere B is 160 J/kg. degree C . These spheres are initially at 21 degree C ; and the same quantity of heat is added to each sphere . If the final temperature of sphere A is 72 degree C , what is the final temperature of sphere B ?
Physics Heat & Thermodynamics Level: High School
A soft drink manufacturer claims that the new diet drink is “low Joule” . The label indicates the available energy is 6300 J . What is the equivalent of this energy in Calories (1 Calorie = 1000 Cal ) ?