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 Force 30 Flashcards |
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Which of the following forces acts on bodies in physical contact? A) Gravitational Force B) Electrostatic Force C) Contact Forces D) Magnetic Force |
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C) Contact Forces |
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Fill in the blank: The force exerted by a surface that supports the weight of an object resting on it is called ______. |
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Normal reaction force |
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True or False: The gravitational force between two particles is always repulsive. |
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False. The gravitational force is always attractive. |
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What is the SI unit of force? |
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Newton (N) |
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Riddle: I attract and cause movement downwards, but you don't see me. What am I? |
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Gravity |
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According to Newton's Second Law, the acceleration of a body is directly proportional to the ______ applied on it. |
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Force |
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Which of the following best describes inertia? A) Change in motion B) Resistance to change in motion C) The force of gravity D) None of the above |
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B) Resistance to change in motion |
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Fill in the blank: The turning effect of a force about an axis is called ______. |
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Torque |
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True or False: To every action, there is an equal and opposite reaction. |
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True. |
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What is the relationship between momentum (p), mass (m), and velocity (v)? |
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P = mv |
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Riddle: I can make objects spin, but I am not a force that you can see. What am I? |
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Torque |
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Fill in the blank: The ______ is the point about which the algebraic sum of moments of weights of all particles is zero. |
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Centre of gravity |
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What type of motion occurs when a body moves in a circular path with constant speed? |
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Uniform circular motion |
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True or False: Centrifugal force is a real force acting on a body moving in a circular path. |
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False. Centrifugal force is a fictitious force. |
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How does the magnitude of non-contact forces change with distance? |
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It varies inversely as the square of the distance of separation. |
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Completed! Keep practicing to master all of them. |
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