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Problems with solutions
| I.D |
Level |
Problem |
Problem Topic |
| 342 |
High school |
Some students have gone to visit Valley of Fire State Park to study rock formations . They park their car and then begin walking to various interesting areas . First they walk northeast(45 degree north of east) for 900 , meters . Then , they walk 1.200 km in a direction 50 degree north of west . Finally , they walk 0.700 in a direction 30 . degree . . . continues
Click to Purchase Solution |
Kinematics |
| 343 |
High school |
In the Olympic trials , the winner of the first heat takes 42 seconds to run the 400 meter sprint . This race complete one lap around the track (assumed to be exactly 400m in circumference) . and the finish line is located at the same point on the track where the sprinters began their race . What was the average velocity of the race winner ? . . . continues
Click to Purchase Solution |
Kinematics |
| 344 |
High school |
In the metric drag races (a previously-unreported Olympic event) , the hottest cars cross the finish line at speeds of 100 m/s . Assume these cars accelerate uniformly and continuously , what is the magnitude of their average acceleration if the drag track is 400 meters long ? . . . continues
Click to Purchase Solution |
Kinematics |
| 345 |
High school |
An Olympic shot putter is doing his thing : His shotput ball , with a mass of 6 kg, lands 20.0 meters from where he launched it at a 45.0 degree angle . Assume he accelerated the shot uniformly for 0.400 seconds , and neglecting the acceleration distance and any height difference between launch and landing (both not quite true) . . . continues
Click to Purchase Solution |
Kinematics |
| 346 |
High school |
At some point in the future , after the Earth Olympics , the Milky Way Olympics are held on the planet Zarkon . (Zarkon is inhabited by folks who like to think up physics questions ). This planet has a mass that is 0.100 that of the earth , and a radius that is 0.500 that of Earth . Zarkon also has a little moon Abba . Abba has a mass whi . . . continues
Click to Purchase Solution |
Kinematics |
| 363 |
High school |
A particle moves in the xy plane with constant acceleration . At time zero , the particle is at x = 3m , y = 10m and has velocity v = 6m/s i + -9m/s j . a = 2m/s2 i + 7m/s2 j . The acceleration is given by the vector.
(a) Find the velocity vector at t = 6s. 18 m/s i + 33 m/s j
(b) Find the position vector at t = 3s. continues
Click to Purchase Solution |
Kinematics |
| 348 |
High school |
Prior to the diving competition on Zarkon , one of the intragalactic divers kicks a stray meteor off the 10.0 meter diving platform . (ie, the top of the platform is 10.0 meters above the water) Assume she kicks the rock horizontally off the board at a speed of 7.00 m/s :
(a) How long does it take for the rock to hit the water( or whatever you . . . continues
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Kinematics |
| 349 |
High school |
The ball in the figure as shown at “click here” is supported by the two massless cables You are told that the weight of the ball is 175 N . What are the tensions in the cable 1 and cable 2 ? With the information gives to you , do the tensions depend on whether or not this problem is being solved on Earth or Zarkon ? Assume that this situation is on . . . continues
Click to Purchase Solution |
Force & Laws of Motion |
| 350 |
High school |
block of wood is sliding down a plane which is inclined 50.0 degree with respect to the ground . The coefficient of kinetic friction between the block of the wood and the inclined plane is 0.125 . Find the acceleration of the block . . . . continues
Click to Purchase Solution |
Force & Laws of Motion |
| 351 |
High school |
A certain string is breaks when it is subjected to 400 N tension. A boy uses this string to whirl a 5.0 kg stone in a horizontal circle of radius 5.0m. The boy continuously increases the speed of the stone. At approximately what speed will the string break ?
(a)10 m/s
(b)20 m/s
(c)80 m/s
(d)100 m/s (1.0 x 10^2 m.s) continues
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Force & Laws of Motion |
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