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You stand on a long flat bed railroad car which you estimate weighs about 4 times your own weight. Initially, the car rolls straight along the ground 20 m/s with negligible friction. You then begin to run across the top of the car opposite its own direction of motion to the ground. You estimate that your speed is about 5m/s relative to the car. What is the resulting increase in the speed of the car?
A civil engineer wishes to plan a curved exit ramp for a highway in a way that a car will not have to rely on friction to round the curve without skidding. In the other words, a car moving at the designated speed can negotiate the curve even while th..
A disk of inertia .10 kgxm2 is rotating with an angular speed of 1.0 rad/s. A non-roatating ring of mass .5 kg, What is the new angular speed of this combination
A rod suspended on its end and acting as a physcial pendulum swings with a period of T=1.49 sec. What is the length of this physical pendulum
The period of a pendulum is proportional to the square root of its length. A 2.5 m long pendulum has a period of 3.0s
Suitcase is on baggage carousel at airport. Carousel is tilted at 21 deg angle. Suitcase moves in circular path r=8.7 coefficient of static friction .52. What is max speed suitcase can move without slipping
A 2120 kg car moving east at 10.7 m/s collides with a 3240 kg car moving east. The cars stick together and move east as a unit after the collision at a velocity of 6.48 m/s.
A uniform 1.2-kg rod that is0.73 m long is suspended at rest from the ceiling by two springs, one at each end of the rod. Both springs hang straight down from the ceiling. The springs have identical lengths when they are unscratched. Their spring con..
An explosive shell, with total mass 80 kg is launched vertically into the air from a mortar. The shell explodes in flight and breaks into two parts with masses of 30 kg and 50 kg, Determine where the other portion of the shell landed
A weather balloon contains 12 m3 of hydrogen gas when it is released from a location at which the temperature is 22°C and the pressure is 101 kPa. evaluate the new volume of the balloon
The position of an object connected to a spring varies with time according to the expression x = (4.8 cm) sin(9.3 ?t). Find the amplitude of the motion
the cgs unit for measuring the viscosity of a liquid is the poise p 1 p 1 gsmiddotcm. the si unit for viscosity is the
A 160 m wide river flows due east at a uniform speed of 4.05 m/s. A boat with a speed of 7.2 m/s relative to the water leaves the south bank pointed in a direction 39o west of north. What is (a) magnitude and (b) direction of the boat's velocity r..
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