# Tag: distance

### Repeat the problem above, but reverse the order of the two legs of the walk; show that you get the same final result. That is, you first walk leg B , which is 20.0 m in a direction exactly 40º south of west, and then leg A , which is 12.0 m in a direction exactly 20º west of north. (This problem shows that A+B=B+A.)

### Suppose you first walk 12.0 m in a direction 20º west of north and then 20.0 m in a direction 40.0º south of west. How far are you from your starting point, and what is the compass direction of a line connecting your starting point to your final position? (If you represent the two legs of the walk as vector displacements A and B , as in Figure 3.56, then this problem finds their sum R=A+B.)

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### Suppose you walk 18.0 m straight west and then 25.0 m straight north. How far are you from your starting point, and what is the compass direction of a line connecting your starting point to your final position? (If you represent the two legs of the walk as vector displacements A and B, as in Figure 3.55, then this problem asks you to find their sum R = A + B .)

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### Find the north and east components of the displacement for the hikers shown in Figure 3.52.

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### Find the following for path B in Figure 3.54: (a) the total distance traveled, and (b) the magnitude and direction of the displacement from start to finish.

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```**Figure 3.54** The various lines represent paths taken by different people
walking in a city. All blocks are 120 m on a side.

### Find the following for path A in Figure 3.54: (a) the total distance traveled, and (b) the magnitude and direction of the displacement from start to finish.

Figure 3.54The various lines represent paths taken by different people walking in a city. All blocks are 120 m on a side.

### A skateboarder starts up a 1.0-m-high, 30° ramp at a speed of 6.9 m/s. The skateboard wheels roll without friction. At the top, she leaves the ramp and sails through the air.

### A) How far from the end of the ramp does the skateboarder touch down?

### Your car tire is rotating at 4.0 rev/s when suddenly you press down hard on the accelerator. After traveling 300 m, the tire’s rotation has increased to 6.5 rev/s . The radius of the tire is 32 cm.

### A) What was the tire’s angular acceleration? Give your answer in rad/s²?

Continue reading “Angular Acceleration| Circular Motion| Physics”

### The figure shows the angular-velocity-versus-time graph for a particle moving in a circle.

### A) How many revolutions does the object make during the first 4.0 s?

Continue reading “Revolutions from angular velocity vs time graph| Circular Motion| Physics”