Question

A car is moving to the right and has zero acceleration. As time goes by, the displacement of the car in each one second time interval... a) is directed to the right and increasing in magnitude. b) is directed to the right and decreasing in magnitude. c) is the same. -------------------------- An object is thrown vertically upward. Air resistance is negligible. At the top of its motion, the acceleration of the object is... a) zero. b) directed vertically upward. c) directed vertically downward. -------------------------- Consider a ball thrown vertically upward. Which one of the following statements is correct concerning the acceleration of the ball from the moment it is released until just before it hits the ground? You may ignore any effects due to air resistance. a) The acceleration has a constant magnitude of g and is directed vertically upward as the ball moves upward and is directed vertically downward as the ball moves downward. b) The acceleration is momentarily zero at the instant that the ball reaches maximum height. c) The acceleration has a constant magnitude of g and is directed vertically downward. -------------------------- Let vector A represent a displacement of 3.0 m East and let vector B represent a velocity of 4.0 m/s directed North. For example, these vectors could represent a car that has moved 3.0 m down the road from its initial location, is moving at 4.0 m/s, and has just turned left. What is the magnitude of the resultant vector obtained by adding the two vectors A and B? a) 7.0 m2/s 5.0 m2/s b) There is no thickness resultant vector. c) It is not possible to add vectors that represent different physical quantities. d) 7.0 s-1

          A car is moving to the right and has zero acceleration. As time
goes by, the displacement of the car in each one
second time interval...
a) is directed to the right and increasing in magnitude.
b) is directed to the right and decreasing in
magnitude.    
c) is the same.
--------------------------
An object is thrown vertically upward. Air resistance is
negligible. At the top of its motion, the
acceleration of the object is...
a) zero.
b) directed vertically upward.    
c) directed vertically downward.
--------------------------
Consider a ball thrown vertically upward. Which one of the
following statements is correct concerning the acceleration of the
ball from the moment it is released until just before it hits the
ground? You may ignore any effects due to air resistance.
a) The acceleration has a constant magnitude of g and
is directed vertically upward as the ball moves upward and is
directed vertically downward as the ball moves downward.
b) The acceleration is momentarily zero at the instant that the
ball reaches maximum height.    
c) The acceleration has a constant magnitude of g and
is directed vertically downward.
--------------------------
Let vector A represent a displacement of 3.0 m East and let
vector B represent a velocity of 4.0 m/s directed North. For
example, these vectors could represent a car that has moved 3.0 m
down the road from its initial location, is moving at 4.0 m/s, and
has just turned left. What is the magnitude of the resultant vector
obtained by adding the two vectors A and B?
a) 7.0 m2/s 5.0
m2/s    
b) There is no thickness resultant vector.
c) It is not possible to add vectors that represent different
physical quantities.
d) 7.0 s-1

Added by Jackson M.

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