Physics Rotational Mechanics Level: Misc Level
In an Atwood s machine : M 1 =20 kg, M 2 =30 kg, and a pulley has a radius of 20 cm and a moment of inertia of 0.500 kg m 2. Find the acceleration of M 2.
Physics Force & Laws Of Motion Level: Misc Level
A 1.0 m long beam is suspended from a wall at one end and supported by a steel wire, at a 30 degree angle to the beam,at the opposite end. A 100 kg sign is suspended 0.75 m from the supporting wall out along the beam.The beam has a mass of 10 kg that is distributed uniformly through out the beam. Find the tension in the wire and the verticaland horizontal forces the wall exerts on the beam.
Physics Rotational Mechanics Level: Misc Level
A record table turn table is rotating at 45 R P M. The moment of inertia of the table is 0.002 kg m2. A record is dropped onto the turntable. If the record is initially at rest and has a moment of inertia of 0.0005 kg m2:
A) How fast are the two going immediately after the collision.( before the belt can act on the turntable)?
B) How much kinetic energy was lost during the collision?
Physics Electromagnetic Waves Level: Misc Level
Show that the crests of a wave psi =Asin ( ax -bt ) move to the right at a speed v equal to the ration of the coefficients of t and x: that is v =b /a.
Physics Wave Optics Level: Misc Level
Electrons with K =100 eV are directed at two narrow slits a distance
d apart. If the angle between the central maximum of the resulting interference
pattern and the next maximum is to be one degree, what should d be?
Physics Wave Optics Level: Misc Level
For diffraction by a single slit, what is the effect of increasing (a) the slit width, and (b) the wavelength?
Physics Waves And Oscillations Level: Misc Level
We can hear sounds around corners, but we cannot see around corners: yet both sound and light are waves. Explain the difference
Physics Wave Optics Level: Misc Level
Compare a double- slit experiment for sound waves to that for light waves. Discuss the similarities and differences
Physics Electromagnetic Waves Level: Misc Level
Why is light sometimes described as rays and sometimes as waves
Physics Waves And Oscillations Level: Misc Level
Does Huygens principle apply to sound waves? to water waves?
Physics Kinematics Level: Misc Level
A baseball player fields a ground ball and attempts to make a 230 ft throw to home plate. Given that player commonly makes long throws at 90 mph, find the two possible angles at which he can throw the ball to home plate. Find the time saved by choosing the smaller angle.
Physics Properties Of Matter Level: Misc Level
A container is filled to a depth of 20.0 cm with water, on top of the water floats a 30.0 cm layer of oil with specific gravity of .700. What is the absolute pressure at the bottom of the container?
Physics Force & Laws Of Motion Level: Misc Level
The figure shows one cart colliding into another cart is at rest. Using the appropriate equations solve the following problems.
a) what is Vf if the carts stick together? ( perfectly inelastic)
b) What is V1 f and V 2 f if the collision is perfectly elastic?
Physics Force & Laws Of Motion Level: Misc Level
Why is it better to crash into an air bag than into the steering wheel of a car? You must put your answer in terms of change of momentum, impulse, force, and time of action of the force.
Physics Force & Laws Of Motion Level: Misc Level
A lump of clay and a rubber ball have the same mass and are dropped from the same height. The clay sticks to the floor, the ball bounces back up. Which object experiences the greatest momentum change?Why?
