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Flashcards in MechOneSecB Deck (16):
1

Friction occurring at surface

vvvv W (Weight)
^^^ Rn (Normal Reaction)
<<< F (Frictional Force)
>>> P (Applied Force)
>>> Motion

2

P (Applied Force) and F (Frictional Force) effected by Rn or weight increasing

P (Applied Force) and F (Frictional Force) increases

3

P (Applied Force) and F (Frictional Force) effected by Rn or weight Decreasing

P (Applied Force) and F (Frictional Force) decreases

4

P (Applied Force) and F (Frictional Force) effected by Co-efficient increases

F (Frictional Force) increases

5

P (Applied Force) and F (Frictional Force) effected by Co-efficient decreases

P (Applied Force) and F (Frictional Force) increases

6

Explain Static Friction 1

Friction at Rest
Requires to non-moving bodies

7

Explain Sliding Friction 1

One object slides over another
2 bodies in reletive motion

8

Explain Rolling Friction 1

One object rolls over another
Resistance to thsi motion is called rolling friction

9

Advantages of friction

Heavy objects can be expected to stay put
Tyres grip while moving up hill

10

Disadvantages of friction

Exert more power to run machines
prevents movement of heavy objects

11

Machine on the moon design

Enclosed Ball bearings
Rollers where possible

12

reduce friction in machine

Use grease regularily
Keep sealed to prevent dust

13

Blowout Bubble?

vvvv W (Weight)
^^^ Rn (Normal Reaction)
<<< Motion
>>> Motion

14

Explain Static Friction 2

REquires more force to get moving than to maintain motion

15

Explain Sliding Friction 2

REquires more force to get moving than to maintain motion

16

Explain Rolling Friction 2

2 bodies in reletive motion
Less friction than other friction types