If an object changes its direction of motion while maintaining a constant speed,
ID: 2112615 • Letter: I
Question
If an object changes its direction of motion while maintaining a constant speed, what direction does the acceleration point? Answer a. The same direction as the object's velocity. b. Opposite the object's velocity. c. Perpendicular to the object's velocity. d. None of the above.At a certain point in time, an object's velocity is:
v = (3, -2, 1) m/s = (3i - 2j + k) m/s. How fast is the object moving (what is its speed)? Answer a. 3.7 m/s b. 14 m/s c. 2.0 m/s d. 6.0 m/s e. 2.4 m/s If an object changes its direction of motion while maintaining a constant speed, what direction does the acceleration point? If an object changes its direction of motion while maintaining a constant speed, what direction does the acceleration point? The same direction as the object's velocity. Opposite the object's velocity. Perpendicular to the object's velocity. None of the above.
At a certain point in time, an object's velocity is:
v = (3, -2, 1) m/s = (3i - 2j + k) m/s. How fast is the object moving (what is its speed)? Answer a. 3.7 m/s b. 14 m/s c. 2.0 m/s d. 6.0 m/s e. 2.4 m/s v = (3, -2, 1) m/s = (3i - 2j + k) m/s. How fast is the object moving (what is its speed)? v = (3, -2, 1) m/s = (3i - 2j + k) m/s. How fast is the object moving (what is its speed)? v = (3, -2, 1) m/s = (3i - 2j + k) m/s. How fast is the object moving (what is its speed)? 3.7 m/s 14 m/s 2.0 m/s 6.0 m/s 2.4 m/s a. The same direction as the object's velocity. b. Opposite the object's velocity. c. Perpendicular to the object's velocity. d. None of the above.
At a certain point in time, an object's velocity is:
v = (3, -2, 1) m/s = (3i - 2j + k) m/s. How fast is the object moving (what is its speed)? Answer a. 3.7 m/s b. 14 m/s c. 2.0 m/s d. 6.0 m/s e. 2.4 m/s
Explanation / Answer
option c is correct
speed = sqrt ( 3^2 + 2^2 + 1 )
= sqrt ( 9 + 4 + 1 )
= sqrt ( 14 )
= 3.74 m/sec
option a is coorexr