Conceptual Physics Problem Set

Conceptual Physics Problem Set - Conceptual Physics P...

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Conceptual Physics Problem Set – Newton’s 2 nd Law of Motion Application 1. A 30.0-g arrow is shot by William Tell through an 8.00-cm-thick apple sitting on top of his son’s head. If the arrow enters the apple at 30.0 m/ s and emerges at 25.0 m/s in the same direction, with what force has the apple resisted the arrow? 2. Phutsaya is sledding down an ice-covered hill inclined at an angle of 15° with the horizontal. If Rose and the sled have a combined mass of 54.0 kg, what is the force pulling them down the hill? 3. Unbeknownst to the students, every time the school floors are waxed, Ma’am Bee, the principal, likes to slide down the hallway in her EIS socks. Ma’am Bee weighs 850. N and the coefficient of sliding friction between her socks and the floor is 0.120. What is the force of friction that opposes Ma’am Bee’s motion down the hall? 4. Nattanon is trying to make her 70.0-kg Saint Bernard go out the back door but the dog refuses to walk. If the coefficient of sliding friction between the dog and the floor is 0.50, how hard must Nattanon push in order to move the dog with a constant speed? 5. Rather than taking the stairs, Warawat gets from the second floor of his house to the first floor by sliding down the banister that is inclined at an angle of 30.0° to the horizontal. a) If Warawat has a mass of 45 kg and the coefficient of sliding friction between Warawat and the banister is 0.20, what is the force of friction impeding Warawat’s motion down the banister? b) If the banister is made steeper (inclined at a larger angle), will this have any effect on the force of friction? If so,
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Conceptual Physics Problem Set - Conceptual Physics P...

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