Question

1- An ice skater is propelling herself along a level horizontal ice field with a posterior force of 50 N and a lateral force of 40 N. What is the resultant force of propulsion? ( ?=? , R=?) 50 N ? R 40 N 2- The polar coordinates of two vectors are; ?A = (10m, 240°), and ?B = (5m, 180°). a) Express each vector in unit vector notation. b) Find, ?R = 2?A + ½?B in unit vector notation. c) Find the magnitude of ?R. d) Find the anticlockwise angle that vector ?R makes with +x axis.

          1- An ice skater is propelling herself along a level horizontal ice field with a posterior force of 50 N and a lateral force of 40 N. What is the resultant force of propulsion? ( ?=? , R=?)
50 N
?
R
40 N
2-
The polar coordinates of two vectors are; ?A = (10m, 240°), and ?B = (5m, 180°).
a) Express each vector in unit vector notation.
b) Find, ?R = 2?A + ½?B in unit vector notation.
c) Find the magnitude of ?R.
d) Find the anticlockwise angle that vector ?R makes with +x axis.

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1- An ice skater is propelling herself along a level horizontal ice field with a posterior force of 50 N and a lateral force of 40 N. What is the resultant force of propulsion? ( ?=? , R=?)
50 N
?
R
40 N
2-
The polar coordinates of two vectors are; ?A = (10m, 240°), and ?B = (5m, 180°).
a) Express each vector in unit vector notation.
b) Find, ?R = 2?A + ½?B in unit vector notation.
c) Find the magnitude of ?R.
d) Find the anticlockwise angle that vector ?R makes with +x axis.

Added by Breanna S.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Adi S

06/29/2022

Step 1

This can be found using the Pythagorean theorem, as the forces are at right angles to each other. The resultant force (R) is the square root of the sum of the squares of the individual forces. So, R = sqrt((50 N)^2 + (40 N)^2) = sqrt(2500 N^2 + 1600 N^2) = Show more…

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1- An ice skater is propelling herself along a level horizontal ice field with a posterior force of 50 N and a lateral force of 40 N. What is the resultant force of propulsion? ( θ=? , R=?) 2- The polar coordinates of two vectors are; →A = (10m, 240°), and →B = (5m, 180°). a) Express each vector in unit vector notation. b) Find, →R = 2→A + ½→B in unit vector notation. c) Find the magnitude of →R. d) Find the anticlockwise angle that vector →R makes with +x axis.

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