What is the typical size of most known asteroids?

A) a few meters
B) a few kilometers
C) a few hundred kilometers
D) larger than the Moon
E) larger than the Earth


B

Physics & Space Science

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A mass m = 4.0 kg is connected, as shown, by a light cord to a mass M = 6.0 kg, which slides on a smooth horizontal surface. The pulley rotates about a frictionless axle and has a radius R = 0.12 m and a rotatinal inertia I = 0.090 kg?m2. The cord does not slip on the pulley. What is the magnitude of the acceleration of m? ? ?

A. ?2.4 m/s2 B. ?2.8 m/s2 C. ?3.2 m/s2 D. ?4.2 m/s2 E. ?1.7 m/s2

Physics & Space Science

A small car has a head-on collision with a large truck. Which of the following statements concerning the magnitude of the average force due to the collision is correct?

A) The truck experiences the greater average force. B) The small car experiences the greater average force. C) The small car and the truck experience the same average force. D) It is impossible to tell since the masses are not given. E) It is impossible to tell since the velocities are not given.

Physics & Space Science

On September 22 or 23, the noonday Sun is overhead at what latitude?

a. 0° b. 23.5°N c. 23.5°S d. That of the Tropic of Cancer

Physics & Space Science

Once a basketball player's feet are off the floor in making a jump, the jumper's acceleration

A) depends on launch speed. B) is usually greater for taller players. C) varies with body orientation. D) is g; no more, no less. E) all of the above

Physics & Space Science