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WorksheetsScience 8 (1st Qtr.) - Review
Total questions: 20
Worksheet time: 7mins
Which of the following is the constant value for the Earth's force of gravity
8.87 m/s2
1.6 m/s2
9.8 m/s2
10.44 m/s²
A book is sitting on a dashboard of a car that's stopped at a traffic light. As the car starts to move forward, the book slides off the dashboard. Pick the most correct explanation.
The object had inertia.
A supernatural force took over.
There was grease on the dashboard.
Air resistance made the book move backward.
Which of the following has the greatest inertia?
car
bus
bike
airplane
Which of the following equations represent Newton’s second law of motion?
a = Fm
a = F
m = aF
F = ma
Which of the following is the BEST example of the Newton's Third Law?
A rocket taking off from earth which pushes gases in one direction and the rocket in the other.
A rocket sitting on the ground preparing for take-off but it needs an outside force to overcome its inertia of a non-moving object.
A rocket that is accelerating through space and exerts a great amount of force because its mass and acceleration is so large.
Both B and C.
How much net force is needed for a 15kg object to accelerate up to 2.5 m/s2?
37 N
36 N
37.5 N
36.5 N
Which of the following factors are related to work?
mass and acceleration
force and acceleration
force and displacement
mass and displacement
An object was displaced up to 4.5 meters after a person carried it, and exerting a force of 3.25 N. How much work was done?
14.63 J
14 J
14.61 J
14.5 J
Which of the following statements about negative work is TRUE?
The object slows down.
The object moves in the opposite direction.
There is no such thing as negative work.
The force applied to the object varies in magnitude.
Which group usually wins in a tug–of–war?
depends on the force applied
the group that pulls the rope harder
the group that pushes the ground harder
neither of the group will win the tug-of-war
When you brush your teeth, you exert force on the brush. Which of the following will result as you do this?
The force of the brush is exerted on your hand.
The force of your teeth is exerted on your brush.
The force of the brush is exerted on your teeth.
The force of your teeth is exerted on your hand.
This is the net force acting on an object that makes it go in uniform circular motion.
centrifugal force
revolution force
centripetal force
orbital force
The following situations show there is work done, EXCEPT:
a band marching
watching a streaming video on the phone
a forklift lifting boxes to a certain elevation
a truck delivering merchandises
Which of the following is a contact force?
gravitational force
electromagnetic force
frictional force
nuclear force
Newton's 1st Law of Motion states that ________.
inertia is an inherent property of and object to resist change, it is independent from external force
acceleration is directly proportional to the magnitude of a net force, and it follows the direction of that net force
all objects will continue to stay in its state of rest or in linear motion unless acted upon by an external force
each and every action has an equal action and opposing reaction
The law of interaction states that action and reaction forces are _______.
opposing and equal of all times
opposing but not equal if they are exerted by two objects with different masses
opposing and equal only for the objects at rest
opposing but never equal
Which of the following statements is TRUE?
Net force is always balanced.
An object moves even there are no forces acting on it.
Only one force can cause an object to move.
Forces can move, stop, or deform an object.
If object A acts on object B with a 5 N force, object B will certainly _____.
be accelerated
have an equal mass
remain at rest
exact an opposite force of 5 N on object A
Which of the following is true regarding centrifugal force?
It is always directed towards the center around which the body is moving.
It is always directed away from the center around which the body is moving.
It is always directed tangentially to the radius with which the body is moving.
It is always directed at 60 degrees to the radius with which the body is moving.
Which of the following refers to the unit Joule?
It is a unit of work.
It is equivalent to Newton-meter.
It is equivalent to kg·m2/s2
All of the above
