Physics unit 5 Forces and Motion

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6th January homework

22 Terms

1

Acceleration

Speeding Up

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2

Deceleration

Slowing down

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3

Displacement

the distance and direction from the start to the end point

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4

Directly proportional

A relationship whereby when one number increases , the other increases at the same rate.

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5

Elastic deformation

When an object stretches or compresses but will return to its original shape and size once any force used to deform it is removed.

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6

Inelastic Deformation

This happens when a material is squashed or compressed and will not return to its original shape and size when the forces are removed.

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7

Moment

the turning effect of a force

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8

Pressure

Force applied per unit area (measured in pascals)

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9

Resultant force

The sum of all forces or overall force acting on an object

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10

Scalar

a quantity that has only magnitude and no direction, such as mass or temperature.

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11

Terminal velocity

The velocity reached when an object us falling under gravity and the forces are unbalanced.

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12

Upthrust

The upward force that a fluid exerts on a body floating in it.

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13

Vector

A quantity the has both magnitude and direction, such as velocity or force.

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14

Velocity

The speed and direction of an object.

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15

Weight

The downward force due to gravitational force.

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16

F = K * E

Force = spring constant * extension

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17

A = (V - U) / T

Acceleration = (final velocity - initial velocity) / time

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18

F = M * A

Force = Mass * Acceleration

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19

M = F * D

Moment of a force = Force * Distance

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20

W = F * S

Work done = Force * Distance

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21

W = M * G

Weight = Mass * Gravitational field strength

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22

P = M * G

Momentum = Mass * Velocity field strength

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