P5 forces

Question 1

definition of mass

Answer 1

is the amount of matter in an object

Question 2

what force is due to gravity

Answer 2

weight

Question 3

mass is measured in

Answer 3

kilograms

Question 4

weight is measured in

Answer 4

newtons

Question 5

Distance and speed are examples of_________quantities

Answer 5

Scalae

Question 6

Force and displacement and velocity are examples od ________quantities

Answer 6

Vector

Question 7

What is contact force

Answer 7

A force between two objects which are touching

Question 8

Non contact force

Answer 8

A force between objects which are separated by space

Question 9

2 examples of contact force

Answer 9

Friction

Air resistance

Question 10

3 non contact forces

Answer 10

Gravitational

Magnetic

Electrostatic

Question 11

Define weight

Answer 11

Force of gravity acting on an objects mass

Question 12

What device is used to measure weight

Answer 12

Newton meter

Question 13

What is the name of the single point at which an objects mass appears to act

Answer 13

Center of mass

Question 14

The center mass of an object jd

Answer 14

The single point at which the objects weight appears to act

Question 15

Resultant force

Answer 15

The single force which has the same effect as the combination of all the different forced afting on an objecy

Question 16

Moving objects with mass are said to have

Answer 16

Momentum

Question 17

State the law of consevation of momentum

Answer 17

In a closed system the total momentum before an event is equal to the total momentum after an event

Question 18

State the equation that links gfs mass and weight

Answer 18

Weight =gfs x mass

Question 19

state the equation that links distance force and work done

Answer 19

Work done= force x s

Question 20

State the equation that links extension force and spring constant

Answer 20

F=Ke

Force=spring constant x extension

Question 21

Equation linking acceleration,change in velocity and time taken

Answer 21

a= 🔼V ➗ t

Acceleration=change in velocity divided by time

Question 22

Equation linking momentum mass and velocity

Answer 22

P=m x v
Momentum= mass x velocity

Question 23

newtons 1st law

Answer 23

inertia
an object will remain at rest or continue to move in a straight line at a constant speed, unless acted on by a resulatant force

or

an object remains in the same state of motion unless a resultant force. If all the forces are balanced, the resultant force is zero.

Question 24

Newtons second law
equation

Answer 24

resulant force=mass x acceleration

F=ma

Question 25

newtons third law (most crucial)
e

Answer 25

every action has an equal and opposite reaction
p=m x v