Physics ยท 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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Pascal's Principle
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Charles Law
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Bernoulli's Principle
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Archimedes' Principle
A
Correct answer
Explanation
Hydraulic machines use Pascal's Principle, which allows a small force applied to a small area to create a much larger force on a larger area.
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boats float
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heated objects expand
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planes fly
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cooled objects contract
C
Correct answer
Explanation
Bernoulli's principle states that as the speed of a fluid increases, its pressure decreases, which creates the lift necessary for airplane wings.
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Nothing would happen to the paper
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You would see the paper fall to the floor.
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You would see the paper float off the desk.
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You would not be able to get the paper off the desk.
C
Correct answer
Explanation
Gravity is the force that keeps objects held against surfaces on Earth. Without gravity, there would be no downward force to keep the paper on the desk, causing it to float away if disturbed.
B
Correct answer
Explanation
An apple falling from a tree is moving in the direction of gravitational pull. Therefore, it is not overcoming gravity; it is being moved by it.
A
Correct answer
Explanation
A kite flying in the sky is held up against the pull of gravity by the lift generated by the wind. Because it stays aloft, it is effectively overcoming gravity.
B
Correct answer
Explanation
Skiing down a hill involves moving in the direction of the gravitational pull. Gravity is actually helping the skier move down the slope, not being overcome.
A
Correct answer
Explanation
An airplane taking off uses lift from its wings and thrust from its engines to move upward. This upward movement is a direct opposition to the downward pull of gravity.
A
Correct answer
Explanation
When you catch a ball, you are applying an external force that stops its motion. If the ball was falling, you are counteracting the acceleration caused by gravity, thus overcoming its effect on the ball's motion.
B
Correct answer
Explanation
Dropping a ball means letting gravity take control. The ball moves toward the ground because of gravity, so it is not overcoming it.
B
Correct answer
Explanation
Jumping into a pool involves moving toward the water, which is in the direction of gravity. You are falling into the pool, not overcoming the force pulling you down.
A
Correct answer
Explanation
When you float in a pool, the buoyant force of the water pushes up against you, balancing the downward pull of gravity. Because you are not sinking, you are successfully overcoming the force of gravity.
B
Correct answer
Explanation
Sliding down a slide is movement caused by gravity pulling you down the incline. You are moving with gravity, not overcoming it.
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radiant energy
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gravity
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force
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oppose
A
Correct answer
Explanation
Radiant energy, such as light or heat, is energy that travels in waves and can move through the vacuum of space. The other options are forces or concepts related to motion, not types of energy.
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gravity
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oppose
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radiant energy
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force
D
Correct answer
Explanation
In physics, a force is defined as a push or a pull upon an object resulting from the object's interaction with another object.
A
Correct answer
Explanation
To oppose means to act against or resist something. In physics, this often refers to forces acting in opposite directions.