A sprinter runs 100.0 m. If he travels at constant acceleration of 1.95 
for the first 6.00 s and then at constant velocity for the remaining time, what was his average velocity?
A. 8.8 m/s
B. 10.2 m/s
C. 9.9 m/s
D. 9.8 m/s
D. 9.8 m/s
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A physical pendulum is composed of a disc whose center of gravity is attached to a thin rod. The disc has a moment of inertia of 1?2 MR2. The mass of the disc is 500 gm and has a radius of 4.00 cm. The length of the rod is 50.0 cm. The period of the physical pendulum is
A. 1.24 sec. B. 1.42 sec. C. 1.74 sec. D. 1.90 sec. E. 2.25 sec.
A projectile is projected from the origin with a velocity of 20.0 m/s at an angle of 30.0 degrees above the horizontal. The projectile lands on a roof that is 4.00 m height. What is the velocity vector when the projectile hits the roof?
A. Vx = 17.3 m/s, Vy = +13.4 m/s B. Vx = 14.3 m/s, Vy = -3.23 m/s C. Vx = 15.2 m/s, Vy = -13.4 m/s D. Vx = 16.8 m/s, Vy = -3.95 m/s E. Vx = 17.3 m/s, Vy = -13.4 m/s
A gravitational field is NOT:
a. always the same regardless of how the objects move. b. measured in newtons. c. a vector field. d. a field that has both size and direction. e. imaginary.
The resultant of a 40-N force at right angles to a 30-N force is
A) 30 N. B) 40 N. C) 50 N. D) greater than 50 N.