science unit 2

Question 1

formula for work done

Answer 1

W=F x D

Question 2

SI units

Answer 2

Work = joules (J)
1 kJ (kilojoules) = 1000J
Force = Newtons (N)
Distance = metres (m)

Question 3

Conditions for work to be done

Answer 3

There is a force acting on the object
The object moves through a distance
The movement of the object is in the direction of the force

Question 4

law of conservation

Answer 4

Energy cannot be created/destroyed but can be converted from one form to another
Total energy remains the same