Physics · Science General
Newtonian Mechanics and Forces
1,605 Questions
Newtonian mechanics studies the motion of objects and the physical laws governing them. This hub covers friction, gravitational force, inertia, and vector quantities. Mastering these fundamental physics concepts is essential for various government competitive exams.
Laws of motionFriction and inertiaVector and scalar quantitiesGravitational accelerationArchimedes principle
Newtonian Mechanics and Forces Questions
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pressure = area ÷ force
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area = force ÷ pressure
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pressure = force ÷ area
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pressure = force ÷ acceleration
C
Correct answer
Explanation
Pressure is defined as the force applied perpendicular to the surface of an object per unit area. Therefore, the formula is force divided by area.
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buoyancy
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pressure
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inertia
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fluidity
B
Correct answer
Explanation
Pressure is the physical quantity that measures the intensity of a force distributed over a specific area. Buoyancy, inertia, and fluidity represent different physical concepts.
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air resistance
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friction
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spring force
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centripetal force
D
Correct answer
Explanation
Centripetal force is the net force that acts on an object to keep it moving along a curved path. In a loop-the-loop, this force is provided by the track.
A
Correct answer
Explanation
When you accelerate, your body experiences an inertial force in the opposite direction of the acceleration, which is what you feel as pressure or weight.
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air resistance
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weightlessness
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g-force
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nauseated
B
Correct answer
Explanation
Weightlessness occurs when the normal force is zero, meaning gravity and acceleration are balanced in a way that the object is in free fall.
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Law of Universal Gravitation
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Law of Conservation of Mass
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Newton's 1st Law of Motion
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Newton's 3rd Law of Motion
C
Correct answer
Explanation
Newton's 1st Law, also known as the Law of Inertia, states that an object in motion stays in motion unless acted upon by an external force.
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inertia
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friction
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an engine
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batteries
A
Correct answer
Explanation
Inertia is the tendency of an object to resist changes in its state of motion. Once a coaster has velocity, inertia keeps it moving forward.
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inertia
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gravity
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friction
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air resistance
B
Correct answer
Explanation
Gravity is the force that pulls the coaster car down the track, converting potential energy into kinetic energy.
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waiting for ride to begin
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the bottom of a steep hill
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climbing a steep hill
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coming down a steep hill
D
Correct answer
Explanation
Kinetic energy is highest when the coaster is moving at its maximum speed, which typically occurs at the bottom of the first major drop.
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mass & weight
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friction & mass
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gravity & inertia
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engines & batteries
C
Correct answer
Explanation
Roller coasters operate primarily by using gravity to provide energy and inertia to maintain motion through turns and loops.
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Hooke's Law
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Newton's Third Law
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Impulse – momentum theorem
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None
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Momentum
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Work
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Acceleration
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Impulse
D
Correct answer
Explanation
The impulse-momentum theorem states that the impulse applied to an object is equal to the change in its momentum.
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Scalar quantity
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Vector quantity
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Both
B
Correct answer
Explanation
Momentum is a vector quantity because it is the product of a scalar (mass) and a vector (velocity), meaning it has both magnitude and direction.
B
Correct answer
Explanation
By definition, one Joule of work is performed when a force of one Newton is applied to an object and moves it a distance of one meter in the direction of the force.
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the upward force on the handle
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the downward force of your feet
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the forward force of your pull
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the force of friction from the grass
C
Correct answer
Explanation
Work is only done by the component of the force that is in the direction of the object's displacement. When pulling a wagon, the forward component of your pull is what causes the displacement.