HOMEWORK FOR UNIT 5-2: COMBINING FORCES

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1 Nam Dat Partnrs HOMEWORK OR UNIT 52: COMBINING ORCES Qustins 15 rfr t a ty ar whih an mv in ithr dirtin alng a hrizntal lin (th psitin axis). 0 Assum that fritin is s small that it an b ignrd. Skth th shap f th graph f th applid fr whih wuld kp th ar mving as dsribd in ah statmnt. 1. Th ty ar mvs away frm th rigin with a nstant vlity. 2. Th ty ar mvs tward th rigin with a nstant vlity. 3. Th ty ar mvs away frm th rigin with a stadily drasing vlity (a nstant alratin). 4. Th ty ar mvs away frm th rigin, spds up and thn slws dwn Dikinsn Cllg, Tufts Univrsity, Univrsity f Orgn Supprtd by Natinal Sin undatin and th U.S. Dpt. f Eduatin (IPSE)

2 Pag H52 Ral Physis: Ativ Larning Labratry V1.21β8/11/93 5. Th ty ar mvs tward th rigin with a stadily inrasing vlity (a nstant alratin). 6. Th ty ar is givn a push away frm th rigin and rlasd. It ntinus t mv with a nstant vlity. Skth th fr aftr th ar is rlasd. 7. A art is mving tward th right and spding up, as shwn in th diagrams blw. Draw arrws abv th art rprsnting th magnituds and dirtins f th nt (mbin) frs yu think ar ndd n th art at t = 0 s, t = 1 s, t. t maintain its mtin with a stadily inrasing vlity. Explain th rasns fr yur answrs. 8. If th psitiv dirtin is tward th right, what is th sign f th fr at t = 2 s in qustin 7. Explain Dikinsn Cllg, Tufts Univrsity, Univrsity f Orgn Supprtd by Natinal Sin undatin and th U.S. Dpt. f Eduatin (IPSE)

3 Ral Physis: Hmwrk fr Lab 5: Cmbining rs Pag H53 Authrs: David Sklff, Rnald Thrntn & Prisilla Laws V1.21β8/11/93 9. A art is mving tward th right and slwing dwn, as shwn in th diagrams blw. Draw arrws abv th art rprsnting th magnituds and dirtins f th nt(mbind) frs yu think ar ndd n th art at t = 0 s, t = 1 s, t. t maintain its mtin with a stadily drasing vlity. Explain th rasns fr yur answrs. 10. If th psitiv dirtin is tward th right, what is th sign f th fr at t = 2 s in qustin 9? Explain. 11. A ty ar an mv in ithr dirtin alng a hrizntal lin (th psitin axis). 0 Assum that fritin is s small that it an b ignrd. A fr tward th right f nstant magnitud is applid t th ar. Skth n th axs blw using a slid lin th shap f th alratintim graph f th ar. A 0 l Explain th shap f yur graph in trms f th applid fr Dikinsn Cllg, Tufts Univrsity, Univrsity f Orgn Supprtd by Natinal Sin undatin and th U.S. Dpt. f Eduatin (IPSE)

4 Pag H54 Ral Physis: Ativ Larning Labratry V1.21β8/11/93 In qustins 1215, assum that fritin is s small that it an b ignrd. 12. Th spring sal in th diagram blw rads 10.5 N. Th art mvs tward th right with an alratin tward th right f 3.25 m/s/s. Nw tw frs ar applid t th art with tw diffrnt spring sals as shwn blw. Th spring sal 1 still rads 10.5 N. Th art nw mvs tward th right with an alratin tward th right f 5.50 m/s/s. What ds spring sal 2 rad? Shw yur alulatins, and xplain. 13. Nw tw frs ar applid t th art with tw diffrnt spring sals as shwn blw. Th spring sal 1 still rads 10.5 N. Th art nw mvs tward th right with an alratin tward th right f 2.50 m/s/s. What ds spring sal 2 rad? Shw yur alulatins, and xplain. 14. Again tw frs ar applid t th art with tw diffrnt spring sals as shwn blw. Th spring sal 1 still rads 10.5 N. Th art mvs with a nstant vlity tward th right. What ds spring sal 2 rad? Shw yur alulatins, and xplain Dikinsn Cllg, Tufts Univrsity, Univrsity f Orgn Supprtd by Natinal Sin undatin and th U.S. Dpt. f Eduatin (IPSE)

5 Ral Physis: Hmwrk fr Lab 5: Cmbining rs Pag H55 Authrs: David Sklff, Rnald Thrntn & Prisilla Laws V1.21β8/11/ Again tw frs ar applid t th art with tw diffrnt spring sals as shwn blw. Th spring sal 1 still rads 10.5 N. Th art mvs tward th lft with an alratin tward th lft f 2.50 m/s/s. What ds spring sal 2 rad? Shw yur alulatins, and xplain Dikinsn Cllg, Tufts Univrsity, Univrsity f Orgn Supprtd by Natinal Sin undatin and th U.S. Dpt. f Eduatin (IPSE)