Chapter 12-Force: Question Preview (ID: 29298)

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A 300-N force acts on a 25-kg object. The acceleration of the object is __________.
a) 7,500 m/s2
b) 300 m/s2
c) 25 m/s2
d) 12 m/s2

According to Archimedes, the buoyant force on an object is equal to ________________.
a) the weight of the object
b) the fluid pressure on the object
c) the density of the fluid
d) the weight of the fluid displaced

A feather falls through the air more slowly than a brick because of ________________.
a) gravity
b) air resistance
c) inertia
d) momentum

Density is given in ________.
a) Pa/cm3
b) N/m2
c) g/s2
d) g/cm3

In a hydraulic system, the force exerted on the large piston is ____________________ the force exerted on the small piston.
a) greater than
b) less than
c) the same as
d) not related to

Forces that are equal in size but opposite in direction are ________________.
a) balanced forces
b) frictional forces
c) inertial forces
d) net forces

The relationship among force, mass, and acceleration is stated in ________________.
a) the law of the conservation of momentum
b) Newton's first law of motion
c) Newton's second law of motion
d) Newton's third law of motion

The upward force on an object falling through the air is ______________.
a) air resistance
b) inertia
c) gravity
d) terminal velocity

When a diver jumps off a diving board, gravity pulls him or her down to the water. What is the reaction force to Earth's gravity?
a) The diver's legs push against the board.
b) Friction between the diver and water slows the diver.
c) Air resistance slows the diver.
d) The diver pulls Earth up.

A Feather falls through the air more slowly than a brick because of
a) gravity
b) air resistance
c) inertia
d) momentum

If gravity did not affect the path of a horizontally thrown ball, the ball would ____________.
a) go straight up
b) travel horizontally
c) fall straight down
d) follow a curved path

If you squeeze the bottom of a closed tube of toothpaste, the pressure is increased _______________.
a) on the bottom of the tube
b) on the top of the tube
c) on the sides of the tube
d) everywhere in the tube

Newton's first law of motion states that an object remains at rest unless a ___________ force acts on it.
a) balanced
b) frictional
c) gravitational
d) net

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