P2 - Forces

Question 1

Newton’s first law

Answer 1

An a one time remains at rest,or moves at a steady velocity unless a force acts upon its

Question 2

Newton’s second law

Answer 2

An object accelerates if a resultant force is acting upon it

Force (N) = mass (Kg) x Acceleration(m/s^2)

Question 3

Newton’s 3rd law

Answer 3

Every action has an equal and opposite reaction

Question 4

Law of conservation of momentum

Answer 4

Momentum is conserved

Question 5

Vector

Answer 5

Has magnitude and direction

Eg-displacement, velocity

Question 6

Scalar

Answer 6

Has magnitude only

Eg-distance, speed

Question 7

Distance time graph

Answer 7

-gradient gives speed

Distance in y, time on X

Question 8

Velocity time graph

Answer 8

Gradient gives you acceleration

Area = distance

Question 9

Equation of motion

Answer 9

V^2-U^2 = 2as

Question 10

Forces

Answer 10

Measured in Newton’s
Can be contact or non contact
Shown force arrow indicating size and direction.

Eg-Friction,weight,upthrust, drag, reaction

Question 11

Equation for kinetic energy

Answer 11

Ke = 0.5MV2

Question 12

Momentum=

Answer 12

Momentum = massxvelocity

Question 13

Work=

Answer 13

Force x distance

Question 14

Power=

Answer 14

=work done / time

Question 15

Force on spring =

Answer 15

Spring constant x extension

Question 16

Elastic potential energy =

Answer 16

0.5 spring constant x extension^2

Question 17

Weight =

Answer 17

Mass x gravitational field strength

Question 18

Gravitational potential energy =

Answer 18

Mass x gravitational field strength x height

Question 19

Moment =

Answer 19

Force x distance

Question 20

Mechanical advantage =

Answer 20

Load / effort

Question 21

Change in momentum/time=

Answer 21

Force