force
kg·m/s
0.22 m/s
a. horizontal component of its initial velocity only.
b. vertical component of its initial velocity only.
c. vertical component of its initial velocity and its time in flight.
d. vertical component and the horizontal component of its initial velocity.
d. vertical component and the horizontal component of its initial velocity.
a. at rest.
b. moving with a constant velocity.
c. being accelerated.
d. losing mass.
c. being accelerated.
Force
a. the object.
b. forces as vectors.
c. forces exerted by the object.
d. forces exerted on the object.
c. forces exerted by the object.
two objects and two forces.
a. A stationary object tends to resist being moved.
b. A moving object tends to resist a change in speed.
c. A moving object tends to resist a change in direction.
d. all of the above
d. all of the above
a. ax = ay = -g.
b. ax = constant and vy = constant.
c. vx = constant and ay = -g.
d. vx = constant and vy = constant.
c. vx = constant and ay = -g.
forces arises from direct physical contact between two objects?
contact force
a. only a downward arrow to represent the force of air resistance.
b. only a downward arrow to represent the force due to gravity.
c. a downward arrow to represent the force due to gravity and an upward arrow to represent the force of air resistance.
d. an upward arrow to represent the force due to gravity and a downward arrow to represent the force of air resistance.
c. a downward arrow to represent the force due to gravity and an upward arrow to represent the force of air resistance.
a. mass.
b. coefficient of static friction.
c. weight.
d. inertia.
c. weight.
downward arrow
If a force of 8.0 x 101 N is being applied to the sled rope at an angle of 53 to the ground, what is the magnitude of the force of friction of the snow acting on the sled?
48 N
inertia
a. 53.0 N c. 65.2 N
b. 70.0 N d. 95.6 N
b. 70.0 N
5 N
a. The car increases speed and changes direction.
b. The car increases speed but does not change direction.
c. The car maintains its speed but changes direction.
d. The car maintains both its speed and direction.
d. The car maintains both its speed and direction.
Forces exerted by the object do not change its motion.
a. the object does not exert a force on Earth.
b. the object exerts a downward force on Earth.
c. Newton’s third law does not apply.
d. the upward acceleration of Earth is negligible because of its large mass.
d. the upward acceleration of Earth is negligible because of its large mass.
a. the force is in the same direction as the displacement.
b. the force is perpendicular to the displacement.
c. the component of the force that does work is in the direction opposite the displacement.
d. the component of the force that does work is perpendicular to the displacement.
c. the component of the force that does work is in the direction opposite the displacement.
a. W = Fd
b. W = Fdcos
c. W = Fdsin
d. W = mgsin
b. W = Fdcos
a. +vcar
b. vcar
c. +2vcar
d. -2vcar
c. +2vcar
a. N
b. 1/N
c. N
d. The coefficient of friction has no units.
d. The coefficient of friction has no units.