Wed 14 Oct

2. If the kinetic coefficient of friction is 0.4, then what would be the force to pull a 50kg object up a 60° incline at a constant speed?

Equation Test on Friday 15th (Eq's 1-18a, 41-43)

Test on Mon/Tuesday 18/19 Oct (Chapters 4-6)

3. A ball is shot at an unknown angle.

It takes 0.5 sec to hit the deck. How high did it go (to apex)

Height = v_ot + 1/2 gt²

Height = 0 + 1/2 (10)(.5)²

1.25m

4. Graphing: As a ball goes up (Ball Toss Lab) Which graph best represents the,

1. Potential Energy as a function of position

2. Kinetic energy as a function of position

3. Potential Energy as a function of time

4. Kinetic energy as a function of time

a b c d

e f

Ans

1. PE vs dist = a

2. KE vs dist = e

3. PE vs time = d

2. KE vs time = b



	Wed Oct 14th: Target: Two Body Tension Quiz: Q#2 Finish Lab Write-ups Journal: Where on the orbit are the places/areas where the speed: a. increases b. decreases c. remain constant? 2. If the kinetic coefficient of friction is 0.4, then what would be the force to pull a 50kg object up a 60° incline at a constant speed? ans. F_x = (sin 60⁰)(weight) F_y = (cos 60⁰)(weight) F_y= F_N F_K = m (F_N) T = F_x + F_k T = (sin 60⁰)(weight) + m (cos 60⁰)(weight) T= (.87)(500N) + (.4)(.5)(500N) T= 433N + 100N = 533N Equation Test on Friday 15th (Eq's 1-18a, 41-43) Test on Mon/Tuesday 18/19 Oct (Chapters 4-6) 3. A ball is shot at an unknown angle. It takes 0.5 sec to hit the deck. How high did it go (to apex) Height = v_ot + 1/2 gt² Height = 0 + 1/2 (10)(.5)² 1.25m 4. Graphing: As a ball goes up (Ball Toss Lab) Which graph best represents the, 1. Potential Energy as a function of position 2. Kinetic energy as a function of position 3. Potential Energy as a function of time 4. Kinetic energy as a function of time a b c d e f Ans 1. PE vs dist = a 2. KE vs dist = e 3. PE vs time = d 2. KE vs time = b