PHYSICS 5C Lecture 15: LECTURE 15

what is the length of ? 9 units 11 units 15 units 16 units

I am a high school physics student who is having trouble solvingthe following problem. I have 90 minutes (11:30 p.m. EST today(9/14) to get the answer. Thanks a million.

PROBLEM:

Here are three displacements, each in meters:
d1 = 3.0i + 5.0j + 7.0k
d2 = -1.0i - 7.0j +3.0k
d3 = 4.0i + 3.0j + 2.0k

What is the component of d1 that is perpendicular to the directionof d2 and in the plane of d1 and d2? [Hint: Consider: c= absin(theta) ]

2. 15 marks Given the following definitions. (defire k 4) (define (gx) (+ xk)) Trace the Scheme expression below. Show all steps, and put one step on each line. You may not need all the lines. (+ (1K2) (- (g 2) (9 k) ) )