eya revision

Question 1

formula for weight

Answer 1

weight = mass x acceleration due to gravity
W = mg

Question 2

what is the formula for pressure

Answer 2

pressure = force x area
PA = N/m2

Question 3

what is the formula for work done

Answer 3

work done = force x distance
W [in J] = F [in N] x d [in m]

Question 4

what is the formula for gravitational potential energy

Answer 4

acceleration due to gravity x mass x height

Question 5

what is a force

Answer 5

a push or a pull

Question 6

what is resultant force

Answer 6

overall force after considering all forces acting on a body

Question 7

what is the law of conservation of energy

Answer 7

energy can be converted from one form to another, but it cannot be created or destroyed

Question 8

state examples of contact forces

Answer 8

frictional force
elastic force
tension force
normal force

Question 9

state examples of non-contact forces

Answer 9

gravitational force
magnetic force

Question 10

what factors affect pressure

Answer 10

force
area

Question 11

what are the requirements for work to be done

Answer 11

1. there is a force acting on the object
2. object is moving
3. movement is in the direction of the force