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It is crash-test-dummy Ed's first day on the job. He (& his 50-kg mass) gets to try out the new 1,200-kg Porsche 911. He has to drive it into a brick wall.The Porsche & Ed are moving 30 m/s when they collide with the wall, with an impulse time of 0.5 s.
1. What is the magnitude of their initial momentum?
2. What is the magnitude of their final momentum?
3. What is the magnitude of the collisonimpulse?
A merry-go-round (carousel) with a moment of inertia of 594 kg·m2, is initially rotating horizontally at 2 rad/s about a frictionless axis through its center.
A rock weighing 400 N sits on the edge of a 60 m cliff. After falling 15 m how much kinetic energy does the rock have
A 48.9 kg pole vaulter running at 13.0 m/s vaults over the bar. Assuming that the vaulter's horizontal component of velocity over the bar is 1.7 m/s and disregarding air resistance, how high was jump.
A fixed, stationary hydrogen ion is located at the origin. Find how much work must be done to move a second hydrogen
A certain string can withstand a maximum tension of 30 Newton without breaking. A kid ties a 250 gram stone to one end of the string. find the speed of the stone when the string breaks
The average banana contains 0.436 g of potassium, and 0.012% of naturally occuring potassium is 40K, What is the activity of a freshly picked bunch containing four bananas
A fishing line has attached to it a hollow plastic float 2.15 cm in diameter and having a mass of 1.90 g. Find the mass of a lead weight
A container of volume V is divided by partitions into three parts containing one kilomole of helium gas, Calculate the kilomole fraction
A street lamp weighs 150N. It is supported by two wires thatform an angle of 120 degrees with each other.The tensions in thewires are equal. find the tension in each wire supporting the street lamp
A trayson crystal torpedo, traveling at 2.40 x 10^6 m/s, is lanuched against the Zargon B-Class Warship. How long(in time) must the pusle be to stop the torpedo
A supersonic jet flying at 145 m/s is accelerated uniformly atthe rate of 23.1 m/s2 for 20.0 s. How many times thespeed of sound is the planes final speed
A solenoid of length 13 cm consists of a wire wrapped tightly around a wooden core. The magnetic field strength is 5.0 T inside the solenoid. what does the magnetic field become
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