Reviewer Q1 Science 8 by AMC

Which is the unit of force in metric system?

• dyne

• joules

• newton

• pound

What force is always directed opposite the motion of an object?

• friction

• gravitational

• magnetic

• tension

What type of force holds between two celestial bodies like the sun and the earth?

• normal

• gravitational

• magnetic

• tension

Which of the following mechanical device can be used to move load easier using the wheel and axle?

• wheel barrow

• lever

• screw

• wedge

What is the net force in the figure below?

• 1 N, to the left

• 1 N, to the right

• 11 N, to the left

• 11 N, to the right

If three construction workers could exert a 500 N of force each to lift the box, could they lift a 500 kg box?

• Yes because they have a total net force of 500N

• Yes because they have a total net force of 1500 N

• No because their total net force is not enough to lift a 500kg box

• No because each 500N could not be added together as a total net force to lift the box.

What law of motion state that a body will remain at rest or move at constant velocity unless acted upon by external net or unbalance force?

• Law of Interaction

• Law of Gravity

• Law of Inertia

• Law of Acceleration

How is acceleration related to force?

• When acceleration of an object is increasing, the net force acting on it is decreasing.

• When acceleration of an object is decreasing, the net force acting on it is increasing.

• Acceleration of an object is directly proportional to the net forces acting on it.

• Acceleration of an object is inversely proportional to the net forces acting on it.

What law of motion states that for every action there is always an equal and opposite reaction?

• Law of Interaction

• Law of Gravity

• Law of Inertia

• Law of Acceleration

When mass is constant, what happens to the acceleration of an object when the magnitude of the net force acting on it is increasing?

• It will remain the same

• It will increase

• It will be divided into two

• It will decrease