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WorksheetsCh. 3 - Forces (a)
Total questions: 36
Worksheet time: 18mins
Balanced forces acting on an object cause the object to accelerate.
True
False
Gravity causes all falling objects to accelerate at a rate of 98 m/s2.
True
False
Acceleration is defined as the rate of change of position.
True
False
The projectile velocity is the highest velocity that will be reached by a falling object.
True
False
When an object falls, it is reacting to the force of gravity.
True
False
Jane is on a merry-go-round that is moving at a constant speed. Her velocity is also constant.
True
False
Momentum is a property of an object and cannot be transferred from that object to another object.
True
False
Friction is a force that encourages motion between two surfaces that are touching each other.
True
False
The greater an object's mass, the weaker the gravitational force on it.
True, keep "weaker"
False, change "weaker" to "stronger"
False, change "weaker" to "harder"
False, change "weaker" to "slower"
When a ball is dropped, it falls down due to the force of friction.
True, keep "friction"
False, change "friction" to "static"
False, change "friction" to "velocity"
False, change "friction" to "gravity"
Pushing a box up a hill, you have to overcome static friction.
True, keep "static"
False, change "static" to "rolling"
False, change "static" to "sliding"
False, change "static" to "fluid"
A box doesn't move when you push it because of static friction.
True, keep "static"
False, change "static" to "rolling"
False, change "static" to "sliding"
False, change "static" to "fluid"
The upward force on an object falling through the air is _____.
air resistance
inertia
momentum
terminal velocity
The relationship among mass, force, and acceleration is explained by _____.
conservation of momentum
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
A feather will fall through the air more slowly than a brick because of _____.
air resistance
gravity
inertia
momentum
The acceleration due to gravity is _____.
98 m/s2
9.8 m/s2
9.8 m/s
0.98 m/s
According to Newton's second law of motion, _____.
F=m×a
F=m×v
F=p×a
F=p×v
When an object moves in a circular path, it accelerates toward the center of the circle as a result of _____.
centripetal force
frictional force
gravitational force
momentum
The path of a projectile is _____.
curved
always horizontal
always vertical
straight
For any object, the greater the force that's applied to it, the greater its _____ will be.
acceleration
gravity
inertia
velocity
The size of the gravitational force between two objects depends on their _____.
frictional forces
inertia
masses and the distance between them
speed and direction
As you get farther from the center of Earth, your weight will _____.
decrease
increase
remain the same
can't tell from information given
When a force is exerted on a box, an equal and opposite force is exerted by the box. These forces are called _____ forces.
action-reaction
centripetal
frictional
gravitational
A real car moving at 10 km/h has more momentum than a toy car moving at the same speed because the real car _____.
generates less friction
has greater mass
has less mass
has greater forward motion
In the equation p=m×v , the p represents _____.
friction
inertia
momentum
position
The statement "to every action there is an equal and opposite reaction" is _____.
the law of conservation of momentum
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
When two balls collide, the momentum of the balls after the collision is explained by _____.
the law of conservation of momentum
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
If gravity did NOT affect the path of a horizontally thrown ball, the ball would _____.
go straight up
fall straight down
follow a curved path
travel horizontally
According to Newton's second law of motion, a larger force acting on an object causes a greater _____ of the object.
deceleration
acceleration
mass
displacement
_____ friction is the friction between two surfaces that are not moving past each other.
Fluid
Rolling
Sliding
Static
A car slides on ice because it doesn't have enough _____ friction.
fluid
rolling
sliding
static
Action-reaction forces always act on _____ objects.
opposite
similar
same
different
Two objects that have the same mass are dropped from a tall building. One object is larger and flatter than the other. Explain why the larger, flatter object hits the ground last.
All objects fall at different rates and the flatter object has a greater air resistance and will not fall as fast.
All objects fall at the same rate, but the flatter object has less air resistance and will not fall as fast.
All objects fall at different rates and the flatter object has less air resistance and will not fall as fast.
All objects fall at the same rate, but the flatter object has a greater air resistance and will not fall as fast.
Explain how mass and weight are different from each other.
Mass measures the amount of friction; weight measures the amount of inertia.
Mass measures the force of gravity on the matter; weight measures the amount of matter
Mass measures the amount of matter; weight measures the force of gravity on the matter
Mass measures the amount of inertia; weight measures the amount of friction.
Why is your weight less on the Moon than on Earth, but your mass is the same?
Your mass is the same because the amount of matter didn't change, but the gravitational force decreased which decreases your weight.
Your mass is the same because the amount of matter didn't change, but the gravitational force increased which decreases your weight.
Explain the action-reaction forces of a rocket in space.
Gravity is the action force; the accelerating rocket is the reaction force.
The accelerating rocket is the action force; inertia is the reaction force.
Gravity is the action force; hot gases are the reaction force.
Hot gases are the action force; the accelerating rocket is the reaction force.
