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quiz4Ab1 (1)

# quiz4Ab1 (1) - Physics 1A 9 AM class Quiz 4 Nov 21 2008...

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Physics 1A- 9 AM class Quiz # 4 Nov. 21, 2008 Prof. Jose Onuchic MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Geosynchronous satellites orbit the Earth at a distance of 42 000 km from the Earth's center. Their angular velocity at this height is the same as the rotation of the Earth, so they appear stationary at certain locations in the sky. What is the force acting on a 1 500-kg satellite at this height? Hint: recall that force is related to centripetal acceleration A) 457 N B) 85 N C) 510 N D) 333 N E) 404 N 2) A 0.30-m-radius automobile tire accelerates from rest at a constant 2.0 rad/s 2 . What is the centripetal acceleration of a point on the outer edge of the tire after 5.0 s? Figure 1 An 8 g bullet is shot into a 4.0 kg block, at rest on a frictionless horizontal surface. The bullet remains lodged in the block. The block moves into a spring and compresses it by 3.0 cm. The force constant of the spring is 1500 N/m.

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