Paper 1 Forces

Question 1

What is the difference between distance & Displacement?

Answer 1

Distance … is how FAR an OBJECT MOVES in ANY DIRECTION

Displacement is how

. Far the object has traveled from the ORIGIN - .
measured in a STRAIGHT LINE
. It has a direction

Question 2

Distance travelled =

Answer 2

Distance = speed x time
(s) (v)

Speed measured in (m/s)
Distance measured in metres

Question 3

What is VELOCITY

Answer 3

VELOCITY is the SPEED on a object in a given DIRECTION

Question 4

When travelling in a straight line an object has what?

Answer 4

travelling in a straight line an object has:

CONSTANT SPEED & CONSTANT VELOCITY

Question 5

What is ACCELERATION?

Answer 5

Acceleration is:

. how quickly an objects SPEEDS UP SLOWS DOWN or CHANGES DIRECTION

Acceleration = change in velocity/time taken

Question 6

Force =

Answer 6

Force = mass x acceleration

F = ma

Force - is measure in newtons (N)
Mass - is measure in kg
Acceleration is measure in metres per seconds squared

Question 7

REQUIRED PRACTICAL

The effect of VARYING the FORCE and/or the MASS on the ACCELERATION of an OBJECT

Answer 7

The effect of VARYING the FORCE and/or the MASS on the ACCELERATION of an OBJECT

Question 8

Another formula for finding ACCELERATION

Answer 8

Another formula for finding ACCELERATION

V2 - U2 = 2as

V2 is final velocity squared
U2 is initial velocity squared
A is acceleration
s is distance measure in metres

Question 9

What is terminal velocity

Answer 9

Terminal velocity:

. Initially due to gravity an object accerlerates
. When the object falls at a STEADY SPEED this is
called TERMINAL VELOCITY

Question 10

What is Newton’s Third Law

Answer 10

Newton’s Third Law

For every action there is an equal & opposite reaction
eg a rocket pushes fuel BACKWARDS which in turn pushes the rocket FORWARDS

Question 11

What is momentum?

Answer 11

Momentum is the product of mass and velocity

Momentum = mass x velocity

Question 12

What is the stopping distance of a vehicle?

Answer 12

The stopping distance of a vehicle is:

. THINKING distance - time the driver takes to react

. BRAKING distance - the distance travelled under the braking force

Question 13

Reaction time can be affected by:

Answer 13

Reaction time can be affected by

ALCOHOL DRUGS FATIGUE & DISTRACTIONS

Question 14

When can an object travel at a constant speed but with a changing VELOCITY?

Answer 14

GOING ROUND A CORNER could give a CONSTANT SPEED but with a changing VELOCITY

Question 15

What is MOMENTUM

Answer 15

MOMENTUM = mass x velocity

Question 16

Define Speed & Velocity

Answer 16

SPEED is how FAST an object is MOVING

VELOCITY is how FAST & OBJECT is MOVING AND IN WHAT DIRECTION

Question 17

What is INERTIA?

Answer 17

INERTIA is when an object continue at rest or a steady speed in a STRAIGHT LINE