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Worksheets8 Force Dynamics
Total questions: 32
Worksheet time: 59mins
A truck collides with a small car and causes a lot of damage to the car. Which of the following is true
the force on the truck is greater than the force on the car
the force on the truck is equal to the force on the car
the force on the truck is smaller than the force on the car
the truck did not slow down during the collision
Ff = µmg
How much frictional force is between this 120 kg couch and the carpet it is on if there is a coefficient of friction of 0.52?
g= -9.8 m/s2
-62.40 N
-611.52 N
-458.36 N
-130.32 N
The amount of matter that an object contains is its ________________
shape
density
volume
mass
The amount of air resistance on an object depends on ____________, _________ and ___________.
color, temperature & mass
shape, size & speed
weight, mass & force
balance, level & height
Acceleration takes place when an object changes its velocity. An objects velocity changes when it
goes forward or reverses with time
speeds up, slows down or change displacement
speeds up, slows down or change direction
goes up or goes down with time
Two forces act on an object. One force is 55 N to the East and other is 35 N to the West. What is the net force?
(ΣF - net force) ΣF = F1 + F2 ΣF = ma
20 N to the East
90 N to the East
20 N to the West
90 N to the West
A 20 kg object experiences a net force of 5 N. What is the acceleration of the object?
(ΣF - net force) ΣF = F1 + F2 ΣF = ma
0.25 m/s2
100 m/s2
4 m/s2
25 m/s2
The acceleration of an object is directly proportional to
the net force
the velocity
the mass
the inertia
According to the 2nd Law of Motion, the acceleration of an object is inversely proportional to
the net force
the velocity
the mass
the inertia
Four forces act on an object. One force is 55 N to the East, another is 35 N to the West, a third is 65 N to the West and the fourth is 20 to the East. What is the net force ΣF?
ΣF = F1 + F2 + F3 + F4
175 N to the East
65 N to the East
25 N to the West
90 N to the West
When you sit on a chair the net force on you due to gravity and normal force is?
zero
up
down
depends on your weight
when the rocket engines on a spacecraft are suddenly turned off the starship will
stop immediately
slow down and eventually come to a stop
go faster and faster to infinity and beyond
cruise with constant velocity through space
As the distance between two objects increases their gravitational attraction
Increases
Decreases
Stays the same
Stops
Saturn has an acceleration due to gravity g of -10.44 m/s2 What is the mass of an object that weighs -783 on Saturn? W=mg
0.013 Kg
8174.54 Kg
75 Kg
783 Kg
An asteroid of mass 1256 Kg approaches the Sun where acceleration due to gravity is -274 m/s2. What will be the weight of the asteroid when it is close to the Sun's surface? W=mg
-4.58 N
-0.218 N
-1256 N
-344144 N
What force overcomes gravity in a fluid to cause an object to float?
applied force
antigravity force
normal force
bouyant force
In physics, this may be described as the pulling force transmitted by the means of a string, cable, chain, or similar one-dimensional continuous object
Tension
Buoyancy
Friction
Normal Force
Which freebody diagram best represents a desk being pushed across the classroom floor?
An object resting on a surface does not fall because
its weight and normal force are equal and opposite creating zero net force
the surface doesn't allow gravity to pass through so the object is not pulled down
friction between the object and the surface it is on stops the objects motion
the surface exerts more force than the weight of the object so it cannot fall
A book is slid across a desk. What is the net force equation for the vertical (y) direction
ma = Fapp + Fg
ma = Fg + FN
ma = Fapp + Ff
ma = FN + Ff
Normal force is always ______________ to Weight.
more than and in the same direction
equal and opposite
equal and in the same direction
less than and opposite
What force opposes the motion of two objects sliding past each other?
Applied Force
Normal Force
Frictional Force
Gravitational force
