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Q. A 1800 kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 6.00 m before coming into contact with the top of the beam, and it drives the beam 14.0 cm farther into the ground before coming to rest. Using energy considerations, calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest.
A steel beam that is 5 m long weighs 320N. It rests on two supports, 3.00 m apart, with same amounts of the beam extending from each end. Suki, who weighs 525N, stands on the beam in the center and then walks toward one end. How close to the end c..
A 3.3 block of wood sits on a table. A 3.0 bullet, fired horizontally at a speed of 480, goes completely through the block, emerging at a speed of 200 .What is the speed of block immediately after the bullet exits.
A 23 g ball is fired horizontally with initial speed toward a 110 g ball that is hanging motionless from a 1.1m long string. The balls undergo a head on, perfectly elastic collision, after which the 110 g ball swings out to a maximum angle theta m..
The energy of a simple harmonic oscillator could be doubled by increasing the amplitude by a factor of approximately
A particle undergoes a displacement Δr of magnitude 57 m in a direction 25° below the x axis. Express Δr in terms of the unit vectors x and y.
A 1.0 kohm resistor is connected in series with a 10 mH inductor, a 30 V battery, and an open switch. at time t=0, the switch is suddenly closed. What are the voltage drops Vr and Vl 20.00 us after the switch is closed.
After a tornado, a 0.55-g straw was found embedded 2.8 cm into the trunk of a tree. If the average force exerted on the straw by the tree was 70 N, what was speed of the straw when it hit the tree .
A 5,000 kg satellite is orbiting the Earth in a circular path. The height of the satellite above the surface of the Earth is 800km. The velocity of the satellite is (Me = 5.98 x 10^24 kg, Re = 6.37 x 10^6 m, G = 6.67 x 10-11 N • m2/kg2)
Coefficient of linear expansion for aluminium
A very large number (N+1) polaroids are arranged in a sandwich.
A driver in a car travelling at a speed of 58.0 mi/h sees a deer 126 m away on the road. Calculate the minimum constant acceleration that is necessary for the car to stop without hitting the deer (assume that the deer does not move in the meantime).
A trough is 5 feet long and 1 foot high. The vertical cross-section of the trough parallel to an end is shaped like the graph of y=x10 from x=1 to x=1. The trough is full of water. Find out the amount of work in foot-pounds required to empty the t..
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