P11 0.0 / 5 PhysicsForces and MotionGCSEAQA Created by: sophielouise277Created on: 20-09-18 18:16 What is pressure caused by? Pressure is caused when objects exert forces on each other 1 of 26 What can pressure also be caused by? When a fluid exerts a force on an object in contact with the fluid 2 of 26 What does pressure depend upon? The area of contact on which the forces act, as well as the size of the force 3 of 26 What is the equation for pressure? Pressure = force/ area 4 of 26 In the water experiment, why does the hole that is furthest below the level of water release a greater force of water? Because the water pressure is greater the further down you go 5 of 26 What is the rule between pressure and a horizontal line? The pressure along a horizontal line in a liquid is constant 6 of 26 What does viscosity mean? How thick it is 7 of 26 Formula for weight, mass and gravity? Weight = mass x gravity 8 of 26 What is the formula for density, volume and mass? Mass= density x volume 9 of 26 What is the formula for density, pressure, gravity and height? Pressure= density x gravity x height 10 of 26 What is the rule between density and pressure? The greater the density of a liquid, the greater the pressure in the liquid 11 of 26 What does the pressure in a liquid increase with? Liquid depth 12 of 26 What is atmospheric pressure due to? Air molecules colliding with surfaces 13 of 26 What does atmospheric pressure decrease with? Altitdue 14 of 26 Why does atmospheric pressure decrease with altitude? Because there is less air above a given altitude 15 of 26 What force is exerted on the body when you go swimming? Upthrust 16 of 26 The more an object is lowered into the water, the bigger the? Volume of water displaced and the bigger the upthrust 17 of 26 When the object is fully immersed, the volume of water displaced is equal to? The volume of the object 18 of 26 An object floats when? Its weight is equal to the upthrust 19 of 26 An object sinks when? Its weight is greater than the upthrust 20 of 26 Objects that float have what? Less density than the density of water 21 of 26 Objects that sink have what? Greater density than water 22 of 26 What does the pressure in a liquid increase with? Density and depth 23 of 26 What is the formula for pressure difference? Height x density x gravity 24 of 26 What is the formula for force difference? Height x density x gravity x area 25 of 26 What is the formual for upthrust? Volume x density x gravity 26 of 26

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