1. A jogger runs halfway around a circular path with a radius of 60 m. What, res
ID: 1774266 • Letter: 1
Question
1. A jogger runs halfway around a circular path with a radius of 60 m. What, respectively, are the magnitude of the displacement and the distance jogged?
a. 60 m, 188 m
b. 120 m, 188 m
c. 0 m, 377 m
d. 120 m, 377 m
2. There are six books in a stack, each with a weight of 5.0 N. The coefficient of friction between all the
books is 0.20 as is the coefficient between the table and the bottom book. What horizontal push must I
just exceed on the next to bottom book to start sliding the top five books off the bottom one?
a. 1.0 N
b. 5.0 N
c. 3.0 N
d. 7.0 N
3. Vector A is 3.0 units in length and points along the positive x-axis; vector B is 4.0 units in length and points along a direction 150° from the positive x-axis. What is the direction of the resultant with respect to the positive x-axis?
a. 77°
b. 13°
c. 86°
d. 103°
Explanation / Answer
Since jogger runs around a semi circle hence displacement will be equal to the diameter which is twice the radius. So displacement = 120m.
Distance covered is equal to the circumference of the semi circle which is R. So distance is ×60= 188.49
Hence answer is (B).
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