work done and power

Question 1

work done

Answer 1

is a measure of the amount of energy transferred through a distance

Question 2

what is the equation for work done

Answer 2

E = f x d

Question 3

what does e stand for in the work done equation

Answer 3

work dones because the workdone by an object is equal to the amount of energy that is transfers

Question 4

what is the unit for energy/ work done

Answer 4

joules

Question 5

what is the unit for forces

Answer 5

Newtons

Question 6

what is the unit for distance

Answer 6

meters

Question 7

what is the equation for power

Answer 7

p = E/t

Question 8

what is the unit for power

Answer 8

watt

Question 9

name 6 contact forces

Answer 9

• friction
• air resistance
• upthrust - only happens in water
• tension - pull force
• water resistance
• normal contact force

Question 10

name 3 non contact forces

Answer 10

• gravitational forces
• magnetic force
• electrostaic

Question 11

what is a moment

Answer 11

the turning effect of a force

Question 12

equation for moment

Answer 12

moment = force x distance

Question 13

what is the units for moment

Answer 13

Nm

Question 14

what does equillibrum

Answer 14

when a situatuon is not changing because all things affecting ut are balanced

Question 15

when a system involving rotation force is in equilibrium what is the equation

Answer 15

the sum of clockwise moments = the sum of anticlockwise moments

Question 16

what are leavers

Answer 16

leavers transmit the turning effect of a force,making it easier to do work, leavers increase the distance between the pivot and your effort, creating a large momentum

Question 17

what is load force

Answer 17

the weight of the objecy being lifted

Question 18

what is the effort

Answer 18

the force applied to the leaver by the person

Question 19

what direction does weight go down

Answer 19

down