In projectile motion the vertical component of the velocity at the top of the trajectory is
A. non-zero, and less than the initial vertical component of the velocity.
B. non-zero, and equal to the initial vertical component of the velocity
C. zero
D. non-zero, and greater than the initial vertical component of the velocity
C. zero
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The stress-_________factor is the ratio of the maximum stress at a discontinuity to the average stress in the specimen without the discontinuity.
Fill in the blank(s) with the appropriate word(s).
For a standing wave in a rope or string, the points that remain stationary are called ______________
Fill in the blank(s) with correct word
If a ball rolls down an inclined plane and gains 4 m/s each second it rolls, its acceleration is
A) one half of 4 m/s. B) one half of 4 m/s2. C) 4 m/s2. D) 10 m/s2.
What is the magnitude of the magnetic force on a charged particle (Q = 5.0 ?C) moving with a speed of 80 km/s in the positive x direction at a point where Bx = 5.0 T, By = ?4.0 T, and Bz = 3.0 T?
a. 2.8 N b. 1.6 N c. 1.2 N d. 2.0 N e. 0.4 N