P5 Forces

Question 1

<p>What is a <b>Scalar Quantity</b>?</p>

Answer 1

<p>A Scalar Quantity is a physical quantity that has only magnitude</p>

Question 2

<p>What are some examples of Scalar Quantities?</p>

Answer 2

<ul><li>Temperature</li><li>Mass</li><li>Energy</li><li>Distance</li><li>Speed</li><li>Density</li></ul>

Question 3

<p>What is a <b>Vector Quantity</b>?</p>

Answer 3

<p>A Vector Quantity is a physical quantity that has both size and direction</p>

Question 4

<p>What are some examples of Vector Quantities?</p>

Answer 4

<ul><li>Force</li><li>Displacement</li><li>Velocity</li><li>Acceleration</li><li>Momentum</li></ul>

Question 5

<p>How do you add Vectors together?</p>

Answer 5

<p>Draw a tip-to-tail diagram</p>

Question 6

<p>How do calculate <b>acceleration</b>?</p>

Answer 6

<p>Acceleration = change in velocity ÷ time taken</p>

Question 7

<p>What are <b>Contact Forces</b>?</p>

Answer 7

<p>Contact Forces are forces that happen when two objects are touching</p>

Question 8

<p>What are some examples of Contact Forces?</p>

Answer 8

<ul><li>Friction</li><li>Air Resistance</li><li>Tension</li></ul>

Question 9

<p>What are <b>Non-Contact Forces</b>?</p>

Answer 9

<p>Non-contact forces are forces that happen when the objects are separated</p>

Question 10

<p>What are some examples of Non-Contact Forces?</p>

Answer 10

<ul>Gravitational Force<li>Electrostatic Force</li><li>Magnetic Force</li></ul>

Question 11

<p>What are an <b>interaction pair</b>?</p>

Answer 11

<p>An interaction pair are a set of two forces that are equal and opposite</p>

Question 12

<p>How is constant speed shown on a distance-time graph?</p>

Answer 12

<p>Constant speed is shown by a straight line</p>

Question 13

<p>How can you tell if an object is stationary on a distance-time graph?</p>

Answer 13

<p>If the line is horizontal, the object is stationary</p>

Question 14

<p>How can you tell if an object's speed is constant on a <b>Velocity-time graph</b>?</p>

Answer 14

<p>If the line is horizontal, then the speed is constant</p>

Question 15

<p>How can you tell if an object is accelerating in a velocity-time graph?</p>

Answer 15

<p>If the gradient of the line is positive, the object is accelerating</p>

Question 16

<p>How can you tell if an object is accelerating in a velocity-time graph?</p>

Answer 16

<p>If the gradient of the line is negative, then the object is decelerating</p>

Question 17

<p>How do you work out the distance travelled on a velocity-time graph?</p>

Answer 17

<p>The area under the graph is equal to the distance travelled</p>

Question 18

<p>What is <b>inertia</b>?</p>

Answer 18

<p>Inertia is a measure of how difficult it is to change an object's motion</p>

Question 19

<p>How do you calculate Weight?</p>

Answer 19

<p>Weight = Mass × Gravitational Field Strength</p>

<p>W=Mg</p>

Question 20

<p>What is an object's <b>Centre of Mass</b>?</p>

Answer 20

<p>An object's centre of mass is a single point where all the mass of an object appears to be</p>

Question 21

<p>When will an object topple?</p>

Answer 21

<p>An object will topple when its centre of mass is located outside of its base</p>

Question 22

<p>What is <b>Weight</b>?</p>

Answer 22

<p>Weight is the force that acts on an object in gravitational field</p>

Question 23

<p>What is the <b>Resultant Force</b>?</p>

Answer 23

<p>Resultant Force is the sum of all of the forces acting upon an object</p>

Question 24

<p>What is Newton's 2^nd Law?</p>

Answer 24

<p>Resultant Force (N) = mass(kg) × Acceleration(m/s²)</p>

<p>F=ma</p>

Question 25

<p>What is Newton's 1^st Law?</p>

Answer 25

<p>Newton's 1^st Law states that the velocity of an object will only change if a resultant force is acting on an object</p>

Question 26

<p>What would happen if no resultant force is acting upon an object?</p>

Answer 26

<p>If an object is moving, it will continu moving at the same velocity (same direction and speed)</p>

<p>If an object is stationary, it will remain stationary</p>

Question 27

<p>What is Newton's 3^rd Law?</p>

Answer 27

<p>Newton's 3^rd Law states that whenever two objects react, the forces they exert on each other are equal and opposite</p>

Question 28

<p>At least how many forces must be acting on an object to stretch, bend or compress it?</p>

Answer 28

<p>2</p>

Question 29

<p>What is <b>Elastic Deformation</b>?</p>

Answer 29

<p>Elastic deformation is when an object returns to its original shape when the force is removed</p>

Question 30

<p>Whatr is <b>Inelastic Deformation</b>?</p>

Answer 30

<p>Inelastic Deformation is when an object is unable to return to its original shape once the force is removed</p>

Question 31

<p>What is <b>Hooke's Law</b>?</p>

Answer 31

<p>Hooke's Law states the extension of a spring is directly proportional to the force applied</p>

Question 32

<p>What is the equation for Hooke's Law?</p>

Answer 32

<p>F = ke</p>

<p style="text-align: center;">Force(N) = Spring Constant() × Extension</p>

Question 33

<p>What is a spring's <b>Limit of Proportionality</b>?</p>

Answer 33

<p>The Limit of Proportionality is the point where Hooke's Law no longer true when stetching a material</p>

Question 34

<p>How do you calculate Elastic Potential Energy?</p>

Answer 34

<p>Elastic Potential Energy (Joules) = ½ × Spring Constant (Newtons/Metre) × Extension (Metres)²</p>

Question 35

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Answer 35

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Question 36

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Answer 36

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Question 37

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Answer 37

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