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Two cars A and B approach each other at an intersection. Car A is traveling south at 20 m/s, while car B is traveling east at 17 m/s. What is the velocity of car A as described by the passengers in car B?
1. 37 m/s, eastward
2. 26 m/s, 50° south of east
3. 26 m/s, 40° south of west
4. 26 m/s, 40° south of east
5. 26 m/s, 50° south of west
In a film of Jesse Owen's famous long jump in the 1936 Olympics, What minimum speed did he need at launch if he was also noted to be traveling at 6.5 m/s at the top of the arc
A pedestrain bridge consists of a walkway of mass 1000kg and length 10.0m supported at each end by brackets. Two people, each of mass 80kg, are walking across the bridge.
A 65 kg hiker has fallen down a hole. One rescuer attaches a rope to the injured hiker and then a second rescuer pulls the injured hiker straight up out of the hole at a steady rate. How much force would the second rescuer need to exert on the rope t..
A 10.4 kg block of metal is suspended from a scale and immersed in water, What are the forces exerted by the water on the top and bottom of the block
a ball is thrown with a velocity of 20 ms 60o from the x-axis. the ball lands at the same height as it was thrown.
car A is moving east at a speed of 40mps relative to the ground. car B is moving west at 50mph relative to the ground. what is the relative velocity (speed and direction) of car B
Atomic physics, you begin with 227 over 89. Then there is an alpha decay, What isotope is left after EACH of the decays
A heat engine is based on a cycle consisting of an isobaric, an isometric and an adiabatic process. Find the amount of heat for each process
Consider neon, a noble gas whose molecules consist of single atoms of atomic mass 0.02 kg/mol. What is the root-mean-square speed of a neon atom under such conditions
Three carts of masses Three carts of masses m1=6.0 kg, m2=12.0 kg, and m3=5.0 kg move on africtionless horizontal track with speeds of v1 =5.0 m/s, v2 =3.0 m/s, and v3 =-4.0 m/s,as shown in Figure . The carts stick together after colliding. Find t..
By means of a rope whose mass is negligible, two blocks are suspended over a pulley, as the drawing shows, with m1 = 12.2 kg and m2 = 42.8 kg. find the mass of the pulley
Tritium has a half-life of 12.3 y and can also be used to date organic matter. If the activity of tritium is determined to be 3% of the expected activity, what is the age of the sample
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