FORCES// GCSE SCIENCE Y9

which ones aren't contact forces?

• tension

• air resistance

• lift

• friction

• gravitational force

a scientific quantity that has a magnitude but NO direction

• vector

• scalar

which is the correct formula for weight?

• weight x mass = gravitational field strength

• mass ÷ gravitational field strength = weight

• mass x gravitational field strength = weight

what is weight measured in?

• newton meters

• grams

• newtons

• kilograms

QUESTION:

A car has a mass of 10,000 kg. What is the WEIGHT of the car?

(Use 10n/kg as the value of gfs)

• 1,000 N

• 100,000 N

• 10,000 N

• 100 N

what is a resultant force?

• the overall effect of more than two forces acting on an object

• the overall effect of weight acting on an object

• the overall effect of more than one force acting on an object

a free body force diagram is used to show the ?????? acting on an object.

if the resultant force on an object is zero it will ?????

• the direction may change

• it will continue at the same speed

• it will stay still

• the speed will change

if the resultant force of an object is NOT zero it will ????

• the speed will change

• it will continue at the same speed

• it will stay still

• the direction may change

what is this an example of?

• parallelogram of forces diagram

• centre of mass diagram

• scale vector diagram

• free body force diagram