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WorksheetsSCIENCE 8 PHYSICAL 3RD MONTHLY EXAM
Total questions: 42
Worksheet time: 29mins
It is defined as a push or a pull.
Elements
Force
Friction
Fracture
It is defined as forces that are equal in magnitude.
Unbalanced Forces
Forces
Balanced Forces
Net force
It is defined as forces that are not equal in magnitude.
Unbalanced Forces
Forces
Balanced Forces
Friction
Use the picture as reference. If the force of the girl pushing is 30N, and the force of the boy who is also pushing is 30N, what is the net force?
0N
60N
900N
1N
Use the picture as reference. If the force of the girl pushing is 20N, and the boy who is also pushing is 15N, what is the net force?
5N
300N
35N
1.33N
If you apply an unbalanced force to an object at rest, what will happen to that object?
the object will remain at rest.
the object will move.
The object will stay.
None of the above.
If all forces acting on an object have equal magnitudes, what is the state of that object?
the object is at rest.
the object is moving.
The object is accelerating.
None of the above.
What operation do we use when forces acting on an object have the same direction?
division
multiplication
subtraction
addition
What operation do we use when forces acting on an object have the opposite directions?
division
multiplication
subtraction
addition
Beri and Ria are pulling a wagon, the force exerted by Beri is 45N and the force exerted by Ria is 12N. If the two girls are pulling on the same direction, what is the net force?
540N
3.75N
33N
57N
What is Newton's 1st law?
Law of Force and Acceleration
Law of Inertia
Law of Action-Reaction
Law of motion
It takes more force to accelerate the iron man on the left than the iron man on the right because the iron man on the left has more mass. This best describes
Newton's first law, the law of inertia
Newton's second law, the law of acceleration
Newton's third law, the law of action reaction
The law of universal gravitation
Newtons 3rd Law of Motion states:
An object at rest will remain at rest unless acted upon by an outside force.
For every action, there is an equal and opposite reaction
The greater the mass of an object, the more force it will take to accelerate the object
What Newtons law does this picture represent
Newtons 1st law
Newtons 2nd law
Newtons 3rdt law
Newtons 4rth law
When you push a boat off from the dock, you are demonstrating Newton's 3rd Law of Motion. It simply states that for every action there is an equal and opposite _______________?
Motion
Reaction
Change
Push
The formula for Force is:
Force= Magnet x Acceleration
Force= Mass x Acceleration
Force= Mass x Arsenic
Funny= Monkey x Arrive
Which is an example of Newton's 2nd law?
A ball bouncing
A fan spinning
Pushing a 10 pound box
Sneezing
An object in motion stops when.....
It falls of an edge.
it is acted upon by an outside force.
It is eaten
It never stops
A push or pull on an object is called...
Acceleration
Mass
Inertia
Force
A fireman turns on his hose and is knocked backwards is an example of...
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Newton's 4rth Law
As the mass of an object increases, what happens to the acceleration of the object?
increases
decreases
remains the same
none of these
The stronger the force, the ________ the acceleration.
greater
lesser
Both
If you push a basketball and a bowling ball with the same amount of force, which one will accelerate more?
Basketball
Bowling ball
They will accelerate at the same rate
According to Newton's second Law, which would take more force to slow down?
The silver car
The green car
They would both take the same force
Your neighbor is riding her bike around the block. When she slows down and turns a corner, which changes about her?
her velocity
her friction
her speed only
her balance
The rate at which an objects velocity changes is called what?
inertia
actualization
acceleration
completion
The motion of the Moon around the Earth is an example of ____________.
uniform action
projectile motion
rectilinear motion
circular motion
A car travels in a circle at constant speed. Which of the following is TRUE about the net force on the car?
zero because the car is not accelerating.
directed towards the direction of travel
directed towards the center of the circle.
none of the above.
What can be said of an object in uniform circular motion?
It has a constant velocity.
It is an example of Newton's First Law in the absence of a force.
It has a constant tangential speed.
none of the choices given
What is the most direct cause of a car's centripetal acceleration as it rounds a curve?
The force of the steering wheel
The weight of the car.
The normal force exerted by the road.
The friction between the tires and the road.
An object A travelling with speed v and following a circular path of radius R has a centripetal acceleration of a. A second object B moving with twice the speed of the first object around a circular path of radius, 2R has a centripetal acceleration that is
the same as object A
twice that of object A
Four times as much as object A
1/2 as much as object A
Energy from the sun is known as.........
hydroelectric energy
geothermal energy
Radiant energy
wind energy
The turkey is being cooked in the oven by _____ Energy.
Thermal
Solar
Electrical
None
Mechanical energy is the sum of what two energies?
Thermal and Radiant
Chemical and Electric
Potential and Kinetic
Nuclear and Sound
Moving electrons is an example of which form of energy?
Thermal energy
Electrical energy
Chemical energy
Mechanical energy
What type of energy is stored in the bonds between atoms
Electrical energy
Thermal energy
Kinetic energy
Chemical energy
