A player hits a ball with a bat. If one part of the interaction is the bat against the ball, the other part is the
A) air resistance on the ball.
B) weight of the ball.
C) ball against the bat.
D) grip of the player's hand against the ball.
E) none of the above
Answer: C
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The coefficient of static friction between the tires of a car and the street is ?s = 0.70 . Of the following, what is the steepest inclination angle of a street on which a car can be parked (with wheels locked) without slipping?
a. 30° b. 40° c. 35° d. 45° e. 32°
A metal blade (length = 80 cm) spins at a constant rate of 10 radians/s about a pivot at one end. A uniform magnetic field of 2.0 mT is directed at an angle of 30° with the plane of the rotation. What is the magnitude of the potential difference between the two ends of the blade?
a. 5.5 mV b. 6.4 mV c. 3.2 mV d. 11 mV e. 13 mV
The total distance traveled by an object in one complete cycle of Simple Harmonic Motion is ________ times the amplitude
A) two B) three C) half D) one E) four
The temperature in the sun
A. is always hotter than in the shade B. is always the same as in the shade C. is sometimes cooler than in the shade D. is not well defined