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WorksheetswILLYS BEST FIZZIKS QUIZ NO4
Total questions: 42
Worksheet time: 20mins
What happens when two forces act in the same direction?
They cancel each other out.
The stronger one prevails.
Their strengths are added.
Their sum divided by two is the total force.
The greater the mass of an object,
the easier the object starts moving.
the greater its inertia.
the more balanced it is.
the more space it takes up.
The force of gravity on a person or object on the surface of a planet is called
mass.
weight.
terminal velocity
free fall.
The force that one surface exerts on another when the two rub against each other is called
a. c.
b.. d. .
friction.
inertia.
acceleration
gravity
The law of universal gravitation states that any two objects in the uni-verse that have mass, without exception,
attract each other.
repel each other.
combine to provide a balanced force.
create friction
Forces can be added together only if they are
acting on the same object
unaffected by gravity
balanced forces
substantial
According to the law of conservation of momentum, when two objects collide in the absence of outside forces,
velocity decreases
velocity increases
the objects have the same momentum before and after they collide.
the objects have more momentum after they collide than they did before.
Any force that causes an object to move in a circle is called a(n)
balanced force
gravitational force.
unbalanced force
centripetal force
The momentum of an object is in the same direction as its
force.
velocity.
acceleration.
inertia.
According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, the nail
creates a friction with the hammer.
disappears into the wood.
exerts an equal and opposite force on the hammer.
moves at a constant speed.
The overall force on an object after all the forces are added together is called the
balanced force
unbalanced force
net force
centripetal force
The force of gravity between you and Earth is greater than the force of gravity between you and a car because Earth has more ____________________ than the car.
mass
density
force
friciton
According to Newton’s third law of motion, the strength of a reaction force is ____________________ the strength of the action force.
equal to
negative to
positive to
greater than
The force of gravity is responsible for continuously changing the ____________________ in which a satellite moves.
direction
orbit
centripetal force
gravitation
A skydiver with a mass of 70 kg accelerates to Earth at a rate of 9.8 m/s2 due to gravity. What is the force on the skydiver?
79.8 Newtons
7.14 Newtons
0.14 Newtons
68.60 Newtons
A skydiver with a mass of 70 kg accelerates to Earth at a rate of 9.8 m/s2 due to gravity. What is the force on the skydiver?
79.8 Newtons
7.14 Newtons
0.14 Newtons
68.60 Newtons
Compare the acceleration of the 1-kg object with that of the 2-kg object.
1kg object has more acceleration because it has less mass
1kg object has less acceleration because it has less mass
2kg object has more acceleration because it has more mass
2kg object has less inertia because it has more mass
Define the term inertia.
the amount of matter in an object
the amount of space an object takes up
the tendency of an object to resist a change in motion, determined by mass
The force that one surface exerts on another when the two rub against each other
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