Forces - Key Terms Questions and Answers Autumn 2022| Graded A

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Forces - Key Terms Questions and Answers Autumn 2022 Accelerating Correct Answer: the rate of change of velocity, measured in metres per second squared (m/s2 ) Acceleration Correct Answer: the... rate of change of velocity, measured in metres per second squared (m/s2 ) Altitude Correct Answer: the vertical height of an object above sea level Atmoshpere Correct Answer: the gaseous envelope surrounding the Earth or another body in space Braking distance Correct Answer: the distance a vehicle travels under braking force (from the point when the brakes are first applied to the point when the vehicle comes to a complete stop) Collision Correct Answer: an event in which two or more bodies, or particles, come together with a resulting change of direction and energy Compression Correct Answer: the act of squeezing / pressing (an elastic object) Contact force Correct Answer: a force that occurs between two objects that are in contact (touching), e.g. friction and tension Deceleration Correct Answer: describes negative acceleration, i.e. when an object is slowing down Dense Correct Answer: having a high density (mass per volume) Displace Correct Answer: to cause a quantity of liquid, usually water, to move from its usual place Displacement Correct Answer: a vector quantity that describes how far and in what direction an object has travelled from its origin in a straight line Distance Correct Answer: a scalar quantity that provides a measure of how far an object has moved (without taking into account direction) Elastically deformed Correct Answer: describes an object that can return to its original shape when the forces causing it to change shape are removed Extension Correct Answer: the distance over which an object (like a spring) has been extended / stretched Fluid Correct Answer: a substance, such as a liquid or a gas, which can flow; has no fixed shape Force Correct Answer: an influence that occurs when two objects interact Free body diagram Correct Answer: a diagram used to show the relative magnitude and direction of all the forces acting on an object in a given situation Gear Correct Answer: a wheel with teeth that engages with another wheel with teeth, or with a rack, in order to change the speed or direction of transmitted motion Gradient Correct Answer: a measure of the steepness of a sloping line; the ratio of the change in vertical distance over the change in horizontal distance Gravity Correct Answer: the force of attraction exerted by all masses on other masses, only noticeable with a large body, e.g. the Earth or Moon Inelastically deformed Correct Answer: describes an object that cannot return to its original shape when the forces that caused it to change shape are removed (because the limit of proportionality has been exceeded) Inertia Correct Answer: the tendency of a body to stay at rest or in uniform motion unless acted upon by an external force Inertia Correct Answer: the tendency of a body to stay at rest or in uniform motion unless acted upon by an external force Inversely proportional Correct Answer: a relationship between two variables, where one variable increases and the other decreases Lever Correct Answer: a rigid bar set on a pivot, used to transfer a force to a load Limit of proportionality Correct Answer: th [Show More]

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