3. When Mr. Ramirez visits East High School, Rather than take the stairs Mr. Ramirez slides down the hand rail of the stairs at Weslaco East high school at 30°
to the horizontal. a) If Mr. Ramirez has a mass of 100 kg and the coefficient of
sliding friction between him and the hand rail is 0.20, what is the force of friction
impeding her motion down the rail? *
Your answer

What is the mass of the same rock on the earth

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules