Motion + forces - Sp2

Question 1

What is the definition of mass?

Answer 1

Amount of matter in an object (like the earth has a mass of 6.0x10(24)kg)

Question 2

What is the definition of weight?

Answer 2

The force acting on an object as a result of gravitational attraction (in Newtons)

Question 3

Equation needed to find force?

Answer 3

Force= mass x acceleration

Question 4

Equation to find weight?

Answer 4

Weight= mass x gravitational field strength

Question 5

equation to find weight as a force

Answer 5

force = mass x gravitational field strength

Question 6

Equation to find resultant force on a falling object

Answer 6

Force= weight - distance

Question 7

what is terminal velocity?

Answer 7

when the resultant force is 0 / a consistent force balanced

so when the air resistance is equal to the weight of a falling object, the resulting force is 0 therefore it is falling at a consistent speed.

this is terminal velocity

Question 8

explain parachutes

Answer 8

using parachute = weight is less than drag + air resistance (parachute gives larger surface area) which slows fall - decreasing velocity

freefalling = weight is bigger than air resistance because people don’t have large surface area
which results in acceleration downwards that increases velocity