A valid unit for momentum is which of the following?
a. kg/m/s2
b. kg/m2
c. kg/m/s
d. N/m
c
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An object is moving in a circular path with a radius of 4.00 m. If the object moves through an angle of 45.0 degrees, then the angle is
A. 0.25 radians. B. 0.53 radians. C. 0.79 radians. D. 1.02 radians. E. 1.44 radians.
The contact force F between the two cylinders in Problem 3.3 may be expressed in terms of load variable W as:
(A) 1.82W (B) 2.5W (C) 2.1W (D) 1.52W
A projectile is projected from the origin with a velocity of 15.0 m/s at an angle of 30.0 degrees above the horizontal. What is the velocity of the projectile 2.00 seconds later?
A. 17.8 m/s at an angle of 38 degrees above the horizontal B. 11.4 m/s at an angle of 43 degrees below the horizontal C. 17.8 m/s at an angle of 43 degrees below the horizontal D. 11.4 m/s at an angle of 38 degrees below the horizontal E. 17.8 m/s at an angle of 43 degrees above the horizontal
Stars lying above the main sequence that are relatively cool but very bright are called
a. red giants. b. white dwarfs. c. brown dwarfs. d. pulsars.