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an car mass 1000kg is traveling east 30m/s . it is hitby another car 2000kg whick was traveling northwest at20m/s.the two cars stick together. ignore friction.
1. what is the velocity of the cars after they stick together?
2. what is the momentum of the two cars after the collition?
Suppose two kids get on a 4 meter long teeter-totter. The one on the right creates a CW torque of 350 Newton-meters (Nm). Quite by coincidence, when the other kid sits at 1 meter from his end they balance perfectly. How much does second kid weigh.
Two 4.0cm × 4.0cm square aluminum electrodes, spaced 0.70mm apart are connected to a 200Vbattery, What is the charge on the positive electrode
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A small button placed on a horizontal rotating platform with diameter 0.328 will revolve with the platform, How far from the axis can the button be placed, without slipping, if the platform rotates at 62.0
Some sliding rocks approach the base of a hill with a speed of 18.0m/s . The hill rises at 40.0? above the horizontal and has coefficients of kinetic and static friction of 0.390 and 0.650, Find the acceleration of the rocks
What is the change in kinetic energy of the puck
The work function for potassium is 2.25eV. A beam with a wavelength of 400nm and an intensity of 10^-9W/m^2. find the maximum kinetic energy of the photelectrons
A sample of ore containing radioactive strontium9038Sr has an activity of 7.6 x 105 Bq. How many grams of strontiumare in the sample
Transverse waves with a speed of 42.5 m/s are to be produced on a stretched string. Calculate the wave speed in the string if the tension is 8.00 N
A wheel with radius 43.9 cm rotates 4.27 times every second. Find the period of this motion.
The bonds pays interest semiannually on June 30 and December 31. The bonds are issued to yield 5%. Illustrate what are the proceeds from the bond issue?
a force of 500 N is requited to hold a spring in the state where it is compressed 0.1 m from its relaxed length. how much work was done to compress the spring
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