Recent content by bmchenry

A pendulum hanging from the edge of a horizontal disk rotating around an axis at a constant rate. The angle that the rotating pendulum makes with the vertical increases with the speed of rotation and can be used as an indicator of speed, calculate speed of disck if R = 0.2m, l = 0.3m and the...

X= Vot I get same answer 10.5 h = 1/2 gt^2 I get 11.03

Homework Statement 2 football players are 16m apart. The receiver runs perpendicular to the line joining the two palyers at a constant speed of 7 m/s. after 2 seconds the quarterbak throws the ball with a horizontal velocity of 24m/s In what horizontal direction and with what vertical...

Homework Statement find a unit vector that bisects the angle between the vectors j+2k and 3i-j+k. report to 2 sig figs Homework Equations The Attempt at a Solution

Never mind but thanks, I figured it out the answer is 3, but I need help bisecting a vector can you help?

Did that and for one answer I got -4.87 which when you put it in the () and square it you get 36 or close enough that the online problem accepted the answer, I assumed that for the other number I just needed to take 3.87 and subtract the 1 which left me with 2.87, however when I plug that in it...

yes it is the absolute value 6, I thought the answer would be to just take the positive 3.87 and subtract 1 from it but that was wrong online

Homework Statement 2 vectors are given by A=3i + 2j +k and Bz = -1i +2j +Bk. A + B =6 Homework Equations Find the two possible vlaues of Bz The Attempt at a Solution 6 = sqrt (4 + 20 +Bzsquared) I get one number to equal -4.87 but when I solve for the other I get it wrong on...