1st Law
Newton’s First Law of Motion is also known as:
A. Law of acceleration
B. Law of inertia
C. Law of action and reaction
D. Law of momentum
B. Law of inertia
Newton’s Second Law of Motion states that the rate of change of momentum of a body is:
A. Always constant
B. Directly proportional to the applied force
C. Inversely proportional to mass
D. Equal to velocity
B. Directly proportional to the applied force
Newton’s Third Law of Motion states that:
A. Force is equal to mass × acceleration
B. Every object continues in its state of rest or motion
C. For every action, there is an equal and opposite reaction
D. Momentum is always conserved
C. For every action, there is an equal and opposite reaction
Which law explains the relation between force, mass, and acceleration?
A. Newton’s First Law
B. Newton’s Second Law
C. Newton’s Third Law
D. Law of Gravitation
B. Newton’s Second Law
What is Mrs. M's favorite food?
Pizza
According to Newton’s First Law, an object at rest will remain at rest unless:
A. It gains mass
B. It is heated
C. An external unbalanced force acts on it
D. The object is heavy
C. An external unbalanced force acts on it
Which of the following equations represents Newton’s Second Law?
A. F = mv
B. F = ma
C. F = m/a
D. F = a/m
B. F = ma
Action and reaction forces are always:
A. Equal in magnitude and same in direction
B. Unequal and opposite
C. Equal in magnitude and opposite in direction
D. Acting on the same object
C. Equal in magnitude and opposite in direction
Which situation is an example of Newton’s First Law?
A. A ball accelerating down a slope
B. A book lying on a table
C. A rocket launching upward
D. A car speeding up
B. A book lying on a table
What is Mrs. M's favorite color?
Pink
Which of the following best defines inertia?
A. Ability to change shape
B. Ability to move fast
C. Resistance to change in motion
D. Resistance to gravity
C. Resistance to change in motion
Which change will increase the acceleration of an object?
A. Increasing its mass
B. Decreasing the applied force
C. Increasing the applied force
D. Increasing friction
C. Increasing the applied force
The reaction force to a person pushing a wall is:
A. Wall falling down
B. Wall pushing the person with equal force
C. Person stopping
D. No reaction force
B. Wall pushing the person with equal force
The force that attracts objects toward the Earth is called:
A. Magnetic force
B. Frictional force
C. Gravitational force
D. Electrostatic force
C. Gravitational force
The basic unit of life is:
A. Tissue
B. Organ
C. Cell
D. Organ system
C. Cell
A passenger in a moving bus falls forward when the bus suddenly stops. This happens due to:
A. Gravity
B. Friction
C. Inertia of motion
D. Inertia of rest
C. Inertia of motion
According to Newton’s Second Law, force is equal to the product of:
A. Mass and velocity
B. Mass and acceleration
C. Momentum and velocity
D. Acceleration and time
B. Mass and acceleration
When a person walks on the ground, the action force is:
A. Ground pulling the person forward
B. Person pushing the ground backward
C. Person pulling the ground upward
D. Ground pushing the person downward
B. Person pushing the ground backward
The SI unit of acceleration is:
A. m/s
B. m/s²
C. km/h
D. N
B. m/s²
The organ that pumps blood in the human body is:
A. Brain
B. Lung
C. Liver
D. Heart
D. Heart
Newton’s First Law applies to objects that are:
A. Only moving
B. Only at rest
C. Either at rest or in uniform motion
D. Accelerating
C. Either at rest or in uniform motion
A body of mass 2 kg accelerates at 5 m/s². What is the force acting on it?
A. 2.5 N
B. 7 N
C. 10 N
D. 20 N
Answer: C 10N
(F = ma = 2 × 5 = 10 N)
A rocket moves upward because:
A. Air pushes the rocket up
B. Gravity pulls the rocket upward
C. Exhaust gases push downward and rocket moves upward
D. Rocket is lighter than air
C. Exhaust gases push downward and rocket moves upward
According to Newton’s First Law, an object will remain in uniform motion unless:
A. Its mass increases
B. Its speed becomes zero
C. An external unbalanced force acts on it
D. Gravity stops acting
C. An external unbalanced force acts on it
The planet known as the “Red Planet” is:
A. Venus
B. Jupiter
C. Mars
D. Saturn
C. Mars