7) If the ball is in contact with the wall in the problem #6 above for 0.01 seco

Question

7) If the ball is in contact with the wall in the problem #6 above for 0.01 seconds then calculate the magnitude of the average force that the wall exerts on the ball, and the force direction, all in vector notation. Choose one of the answers shown below a) F-(2000 N) b) F--(1250 N) R c) F + (2400 N)a d) F : +(2000 N) 8) A 30-gram bullet initially travelling at 500 m/s penetrates 12 cm into a wooden block. What average force does the bullet exert on the block? Choose the closest answer from those provided below. a) 3.125 x 10*N; b) 0.525 x 10'N c) 125 x 10 N; d) 2220 N 9) As we all know, the earth orbits the sun once per year (365.3 days). Using the data d at the back of the exam, calculate the nitude of the earth's orbital r momentum as it orbits the sun. Assume the orbit is circular. Choose one of the answers shown below. a) 1 x 1022 kg m2/s b) 2.67 x 1040 kg.m2/s; c) 5 x 1011 kg m2/s 10) Now that the earth's orbital angular momentum about the sun has been calculated, calculate the magnitude of the earth's angular momentum associated with its spin about its own axis. Use the period of the earth's rotation on its axis of T 24 hours. Choose one of the answers shown below. a) 1 x 1022 kg»m*/s; b)7.07 x 1033 kgem2/s c)5 x 10 kgm/s

Explanation / Answer

Since Q7 is linked with Q6 which is not provided so solving Q8

Initial velocity=500m/s

Distance travelled=0.12 m

Using newton equation for a

a=v*v/2S= 1041666.67 m/s*s

Force =ma=31250 N

Option(a) is correct

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