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A student ofmass m standsat one end of a long log of length l and mass M, which is floating on the campuspond at right angles tothe shore. Assume there is no friction between the logand the water.a) What is the distance of the center of mass of the student-log system from the shore?b) After thestudent walks toward theshore to the other end of the log, where is the center of mass relative to the shore?c) How far isthe student fromthe shore?d) Thestudent jumps off the log with speed v relative to the shore. With what speed and direction does the log move?e) What isthe speed of the center of mass of the student-log systemafter the student landson the shore and comes to rest? Explain.
During the power stroke in a four stroke automobile engine,the piston is forced down as the mixture of combustion products and air undergoes an adiabatic expansion. Find the average power generated during the expansion
A car starts from rest at a stop sign. It accelerates at 4.0 m/s2 for 6 seconds, coasts for 3 s, How far apart are the stop signs
a 10-cm-long thin glass rod uniformly charged to 9.00 and a 10-cm-long thin plastic rod uniformly charged to - 9.00are
A 2.50-g bullet travelling at a speed of 425 m/s, strikes the wooden block of a ballistic pendulum, such as that Figure in 7.12. The block has a mass of 215 g. Calculate the speed of the bullet/block combination quickly after the collision.
The top-most tooth is protruding slightly, and the tension in the wire exerts two forces, what is the magnitude of the net force exerted on the tooth
A skydiver of mass m, jumps from an aircraft at an altitude of hmetres, with an initial speed of 0 m/s. She opens her parachute andlands with a final speed of v m/s. Which expression is equal to theenergy dissipated by air resistance during the jump?
A point like charge of +20nC sits at the center of a thick spherical shell of inner radius 4cm and the outer radius 6cm. The shell is made of copper and has a net charge of -10nC. Describe the distribution of charge on the conductor
A 52.0-kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 20.0 m. What is the centripetal acceleration of the child
A circuit contains a 4.50-nF capacitor and a 4.00-mH inductor. By what factor does this angular frequency change if a 1.00-kilo ohms resistor is connected in series with the capacitor and the inductor
A rowboat with a mass of 94 kg carries a 61 kg rower and 34 kg of water that has accumulated in the bottom. What is the subsequent speed of the boat
A camera flash delivers 2.9 kW of light power for 1.3 ms. Find the total momentum carried by the flash
using energy conservations how would your calculated final velocity change if you threw a ball off a building straight
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