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WorksheetsYazied science CH 2 Lesson 1&2
Total questions: 71
Worksheet time: 36mins
Force is any push or pull !
true
false
Newton (N) is a unit to measure the strength of force !
true
false
A force has a direction !
true
false
A force can change the way objects move .
true
false
How can a force acts on a moving object ?
speeding up
slowing down
changing direction
all of the above
An object needs a force to move or change the way it moves .
true
false
A force that needs two pieces of matter to touch .!
non- contact force
contact force
gravity
magnetism
A force resulting when two materials rub against each other !
Non - contact force
gravity
friction
magnet
Friction is a contact force .
true
false
A force can affect an object's position and direction of its motion !
true
false
A cart's wheels rub against the floor . this causes ..................
force
speed
position
friction
A contact force that opposes the motion of an object 1
friction
force
motion
velocity
Smooth surfaces produce less friction !
true
false
Non contact force that can attract or pull on metal objects !
balanced forces
magnetism
motion
contact force
Can not be attracted by magnet !
wood
steel
iron
plastic
paper
The amount of friction between two objects depends on
their surfaces.
true
false
A north pole of a magnet and a south pole of another magnet are near each other !!what do you think will happen ?
the north pole will attract the south pole of the other magnet .
they will push away from each other
they have no effect on each other
Unlike poles will attract ( North vs South).
true
false
Like poles will repel ( North vs North).
true
false
A noncontact force that pulls objects toward one another.
friction
gravity
force
motion
The pull of gravity on an object gives an object its ............................
mass
color
weight
shape
The pull of gravity is less the farther you are from the Earth’s center.
true
false
When the pull of gravity is weaker, the object’s weight is less !
true
false
A contact force .
gravity
friction
magnetism
Air and water can cause friction .
true
false
Only solids can cause friction .
true
false
Is NOT a non-contact force
friction
electric force
magnetism
gravity
A force that act at distance !
balanced
contact
non-contact
friction
Gravity is a contact force .
true
false
the force of attraction by which every object on Earth exerts a pull on every other object !
friction
gravity
motion
electric force
The force of Earth's pull on an object .
friction
gravity
weight
mass
As an object moves away from earth , the object weighs less and less , because ...............................
the pull of gravity becomes stronger .
the pull of gravity becomes weaker
gravity has no effect on an object's weight .
You weigh less on Earth than in a spaceship orbiting 800 kilometers above Earth .
true
false
A force acts between objects that are electrically charged .
friction
contact force
electric force
gravity .
Objects with opposite charges will ........................
repel
attract
move away from each other .
Move away !!
attract
contact
repel
pull
oppositely charged objects tend to move away from each other .
true
false
will be pulled to a magnet .
iron
nickel
cobalt
wood
paper
Metals are strongly pulled to magnets .
true
false
Magnetic force is greatest at magnet's poles .
true
false
A magnet must touch an object to affect it .
true
false
Magnetism acts at a distance.
true
false
The rate at which the speed or the direction of an object changes over time .
speed
acceleration
motion
position
The tendency of an object to resist any change in motion .
inertia
acceleration
direction
speed
any change in motion !
acceleration
position
direction
inertia
Changing speed or direction as an object moves .
speed
acceleration
uniform motion
constant speed
Motion without acceleration !
uniform motion
velocity
speed
Motion without acceleration !
uniform motion
velocity
speed
When an object is not moving at all ,it has uniform motion .
true
false
An object moves at steady speed but changes direction repeatedly as it moves ! this means it has .........................
uniform motion
acceleration
An escalator is an example of an object that has uniform motion .
true
false
A race car goes around a curve at the same speed as it was moving on a straight track . this means it has uniform motion !
true
false
Motion where speed and direction do not change !
acceleration
uniform speed
A according to Newton's first law , an object will stay in uniform motion unless a net force acts on it .
true
false
Objects with a lot of mass have more inertia than objects with less mass .
true
false
When you ride a car , what pushes you against the side of the car as it turns ?
friction
gravity
inertia
electricity
What makes your body rises up from your seat when the car goes up and over a steep hill ?
gravity
weight
inertia
uniform motion
What makes your body rises up from your seat when the car goes up and over a steep hill ?
gravity
weight
inertia
uniform motion
Standing passengers fall forward when the bus stops !! this is an example of ....................
uniform motion
inertia
friction
gravity
According to Newton's second law , force is the product of mass and acceleration .
true
false
The greater the mass of the object , the smaller its change in motion will be .
true
false
The same force will cause an object with small mass to accelerate MORE than an object with large mass !
true
false
Small masses are harder to accelerate .
true
false
Newton's second law !!
the greater the force applied , the greater the change in motion for a given mass .
The amount of force has no effect on an object's motion .
force is the product of mass and acceleration .
smaller masses are harder to accelerate .
Less force causes less acceleration .
true
false
Force = mass x acceleration
F = m X a
true
false
According to Newton's third law , it is impossible to have one force without an equal and opposite force !
true
false
The greater a net force acting on an object ,.............................
the less the mass of the object
the greater the mass of the object
the less the acceleration of the object
the greater the acceleration of the object .
What happens when an object accelerates ?
Its speed or direction changes .
Only its speed changes
Only its direction changes
Its speed and direction do not change .
An object moves in a straight line without changing its speed or direction , it has .................................
acceleration
uniform motion
Which of the following is an example of an object has uniform motion ??
A Ferris wheel
A book sitting on a table
An escalator
A Train travelling at one speed on one line .
