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Q1. A 1250 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1960 N crate hangs from the far end of the beam.
Q2. Dan is gliding on his skateboard at 2.0 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground? Dan's mass is 60 kg and the skateboard's mass is 5.0 kg.
Q3. A 18 kg box slides 4.0m down the frictionless ramp (30 degrees) shown in the figure , then collides with a spring whose spring constant is 140 N/m. What is the maximum compression of the spring, and at what compression of the spring does the box have its maximum speed?
A box with a mass of 6 kg is lifted (without acceleration) by a height of 6.0 m in order to place it upon the shelf of a closet.
Calculate the threshold wavelength, in nm, of a metal if that metal emits an electron with a kinetic energy of 6.32 × 10-19 J when illuminated with light that has a frequency of 1.97 × 1015 Hz.
A spherical silver ball of radius 1 foot is set on a concrete pedestal as a lawn ornament. How big is the reflection of the hummingbird
The coefficient of volume epansion for diesel is 9.5*10 to the power of negative 4 degrees celcius an the coefficient of linear expansion for the steel truck is 11 times 10 mto the power of negative 6 degrees celcius.
A fisherman notices that his boat is moving up and down periodically due to waves on the water. What is the velocity of the wave
Draw two diagrams for the situation where a moving train (with initial speed v0) collides elastically with a target train that is not intially moving, Show that the final velocity of each train will be:
A 10 kg block is sitting motionless next to a spring that has a spring constant of 500 N/m. How far is the spring compressed while you are still holding it
An insulated Thermos contains 123 cm3 of hot coffee at 73 °C. You put a 12.0 g ice cube at its melting point to cool coffee. By how various degrees has your coffee cooled one time the ice has melted and equilibrium is reached? Treat the coffee as tho..
A wire of unknown material has a cross-sectional area 7 mm2 and length 15 cm. What is the resistivity of the unknown material
A tennis player standing 10.7 m from the net hits the ball at 2.50° above the horizontal. how fast was the ball moving when it left the racquet
Calculate the gradient of V in each region
A box of mass of mass 2 kg is placed on a spring such that when the box is released, the spring will push the box directly upward. what is the maximum height the box will reach
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