Questions asked by Bruce

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• Given two vectors A = -1.00 î + 3.00j + 5.00k and B = 2.00j + 3.00 1.00 k, how can I find the magnitude of each vector and write an expression for the vector difference A-B, using init vectors?
  
• A skier skis 7.40 km in the direction 45.0 east of south, then 2.80 km in the direction 30.0° north of east. and finally 5.20 km in the direction 22.0° west of north. Show these displacements on a diagram? How far is the skier from the starting point?
  
• A hiker travels in a straight line for 40 min with an average velocity that has magnitude 1.2 m/s. How far is she from her starting point after this time?
  
• You drive on the freeway between San Francisco and Sacramento at an average speed of 96 km/h (60 mi/h), and the trip takes 2 h and 10 min. On a rainy day you slow down and drive the same distance at an average speed of 80 km/h (50 mi/h). Question: ?
  
• A rocket is accelerating straight up from the surface. At 1.35s after lift, the rocket clears top of its launch platform, 63m above the ground. After additional 4.45s its 1 km above ground. What's the magnitude of average velocity for the 4.45s part?
  
• When two vectors A and B are drawn from a common point, the angle between them is ф. Using vector techniques, how to show that the magnitude of their vector sum is given by √A^2 + B^2 - 2AB cos ?
  
• A little help please?
  
• A muon (an elementary particle) moving in straight line enters a region with a speed of 5.00 x 10^6 m/s and then is slowed at the rate of 1.25 x 10^14 m/s^2. ?
  
• The head of a rattlesnake can accelerate at 50 m/s^2 in striking a victim. If a car could do as well, how long would it take to reach a speed of 100 km/h from rest?
  
• How about this?
  
• A jumbo jet must reach a speed of 360 km/h on the runway for takeoff. What is the least constant acceleration needed for takeoff from a 1.80 km runway?
  
• How to do this?
  
• A student throws a water balloon vertically downward from the top of a building? [see below]
  
• How much time is it in the air?
  
• Veronica angrily throws her engagement ring? (See below)
  
• The acceleration of a bus is given by a-at, where a= 1.5 m/s^2...?
  
• The acceleration of a motorcycle is given by...?
  
• What is the particle's displacement from r1 to r2?
  
• A rabbit runs across a parking lot on which a set of coordinate...?
  
• How long should the ball take to fall on the floor from the time it leaves the edge of the table...?