Precalculus Quiz 2024 Questions with Correct Answers
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Course
Precalculus
Institution
Precalculus
Precalculus Quiz 2024 Questions with Correct Answers
What is the minimum force required to prevent a ball weighing 22.6 lb from rolling down a ramp which is inclined at 39.0 degrees with the horizontal?
a.
7.1 lb
c.
17.6 lb
b.
8.8 lb
d.
14.2 lb - Answer-X B
Find a*b if a=10i+4j and b=...
Precalculus Quiz 2024 Questions with Correct Answers What is the minimum force required to prevent a ball weighing 22.6 lb from rolling down a ramp which is inclined at 39.0 degrees with the horizontal? a. 7.1 lb c. 17.6 lb b. 8.8 lb d. 14.2 lb - Answer -X B Find a*b if a=10i+4j and b=3i+4j - Answer -C. 46 Find a*b if a=3i+8j and b= -0.5i-4j - Answer -B. -33.5 Determine whether the vectors u and v are orthogonal, parallel, or neither - Answer -A. neither The angle between a 180 -pound force F and AB = 5i + 2j is 30 degrees. Find the work done by F in moving and object from A to B. - Answer -A. 839 foot lbs Use the dot product to find |v| when v=< -2,-2> - Answer -X B A constant force of F = 47i + 30j moves an object along a vector D = 13i - 8j, where units are in pounds and feet. Find the work done. - Answer -B. 371 ft. lbs. Find the angle between u = (sqrt5)i -8j and v = (sqrt5)i+j Round to the nearest tenth of a degree. - Answer -B. 98.5 Find a*b if a=<2, -8> and b=< -1,4> - Answer -C. -34 Use the dot product to find |v| when v=< -8,2> - Answer -X D X B
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