Forces

Question 1

What is the force of gravity on earth

Answer 1

9.8 m/s

Question 2

What is the triangle which helps you with the formulas

Answer 2

F

M. G

Question 3

Write the formula for finding the mass

Answer 3

M= f

g

Question 4

Define the term weight

Answer 4

Gravitational force exerted on earth (planets). It changes depending on where it is measured. Measured in Newtons

Question 5

Define the term mass

Answer 5

Amount of matter in an object. Will remain constant wherever it is measured. Measured in kg

Question 6

Define a force

Answer 6

A force is a push or pull exerted by an object. They always act in pairs eg. Gravity causes object to fall, air resistance will slow it down.

Question 7

Name the 2 types of forces and define them

Answer 7

Contact forces: acts on point of contact between two objects. Eg friction, tension and compression.

Field forces: act over distances. “Action at a distance” eg gravitation , magnetic and electrostatic.

Measures in newtons

Question 8

Name the effects that forces have on objects

Answer 8

They change the shape of the object
They make a stationary object move
Make moving object stop
Change speed of a moving object
Change direction in which object is moving
Have no visible effect at all / no effect

Question 9

Define gravity

Answer 9

Gravity is a field force.
It is the force of attraction between two bodies/objects due to their messes. The bigger the masses, the stronger the gravitational force.

Question 10

Write the formula for converting mass into weight

Answer 10

f=mg