1.
Which term identifies a scalar quantity?
(1) displacement
(2) momentum
(3) velocity (4) time
7.
Which object has the greatest inertia?
(1) a 0.010-kg bullet traveling at 90 m/s (2) a 30-kg child traveling at 10 m/s on her bike (3) a 490-kg elephant walking with a speed of 1.0 m/s
(4) a 1500-kg car at rest in a parking lot
9.
Which situation represents a person in equilibrium?
(1) a child gaining speed while sliding down a slide (2) a woman accelerating upward in an elevator (3) a man standing still on a bathroom scale (4) a teenager driving around a corner in his car
40.
A 4.0-kilogram object is accelerated at 3.0 meters per second north by an unbalanced force. The same unbal- anced force acting on a 2.0-kilogram object will acceler- ate this object toward the north at
(1) 12 m/s2
(2) 6.0 m/s2
(3) 3.0 m/s2
(4) 1.5 m/s2