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Final Exam Review, part 2 Friday, December 12

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6:15 A 1500kg car drives around a flat 200-m-diameter circular track at 25m/s. What are the magnitude and direction of the net force on the car? What causes this force?

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6:24 The centers of a 10kg lead ball and a 100g lead ball are separated by 10cm. What gravitational force does each exert on the other?

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**7:10 What magnitude of F2 causes the net torque on the rod to be zero?**

F1=20.0N 450 .5m 1m

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9:48 A 20 g ball of clay is thrown horizontally at 30 m/s towards a 1.0 kg block and sticks to the block. The block is on a magic frictionless surface. What is the speed of the block and clay immediately after the clay hits?

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**7:48 Before after V1i =20m/s v2i = 0 vf we want to find**

pi=Mball*v1i+0=pf=(Mball + Mblock)vf

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oscillators A massless spring has a spring constant of 10.0N/m. It is hung vertically. Then a 250 g mass is hung from the spring. How far does it stretch? B) If the mass is made to oscillate vertically, what is its period?

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**Mass on a spring k=10N/m, F =mg =k Δy**

Δy = mg/k = .250*9.8/10. = m 24.5cm

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Final Exam Monday, December 15, 1:30-3:30pm HERE

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