Forces Question Preview (ID: 23077)
Chapter 2 Test.
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Friction acts in a direction ____to the direction of an object's motion.
a) unrelated
b) opposite
c) equal
d) perpendicular
Unless an object at rest is acted upon by a force, it stays at rest due to its
a) matter
b) inertia
c) friction
d) gravity
A 10 kg ball is accelerated 500 m/s^2 by a force of
a) 5000 N
b) 50 N
c) 500 N
d) 1/50 N
The momentum of a 1500 kg car traveling at a velocity of 10 m/s is
a) 15000 N
b) 15 m/s^2
c) 150 N
d) 15000 kg(m/s)
A(n) ______ can cause an object's motion to change.
a) unbalanced force
b) balanced force
c) weight
d) inertia
The amount of matter in an object is called its
a) weight
b) force
c) inertia
d) mass
Newton's second law of motion states the relationship of mass, acceleration, and force. It says that
a) force equals mass divided by acceleration.
b) force equals acceleration divided by mass.
c) force equals mass times acceleration.
d) every object attracts every other object in the universe.
A(n) ______ causes objects to move in a circle.
a) centripetal force
b) large weight
c) terminal velocity
d) acceleration
The unit of force, a newton, if equal to
a) the amount of mass in an object
b) mass x velocity
c) kg (m/s)
d) kg (m/s^2)
An objet in free fall ____ until it reaches terminal velocity.
a) decreases in mass
b) slows down
c) accelerates
d) is unbalanced
Weight is the measure of the force of _____ on an object.
a) gravity
b) acceleration
c) Earth
d) the moon
A newton is a unit of _______.
a) force
b) mass
c) length
d) acceleration
Air rushing against an airplane is an example of ______ friction.
a) fluid
b) air resistance
c) true
d) force
The momentum of an object depends on its mass and ________.
a) velocity
b) speed
c) acceleration
d) weight
The total momentum of any group of objects remains the same unless an outside ____ acts on the objects.
a) force
b) object
c) acceleration
d) velocity
Forces can be added together only if they are acting on different objects.
a) True
b) False
c)
d)
According to Newton's second law of motion, acceleration increases as force increases, if mass stays the same.
a) True
b) False
c)
d)
The force exerted by gravity is stronger if two objects are closer.
a) True
b) False
c)
d)
The force of friction acts between all objects in the universe.
a) True
b) False
c)
d)
A satellite in orbit around Earth is always falling towards Earth.
a) True
b) False
c)
d)
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