Last Min Paper 1 Mistakes

Question 1

If you know radius of earth how to find potential any radius away

And thus period?

Answer 1

Have radius of earth, use fsctor to get potential

Now if stuck always write down mv2 /r formula

You’ll see you have accerlwtion = potential , so rearrange for time period now and find it

Question 2

Might have to find out mass of earth using radius?

Answer 2

Know potential at radius is 9.81 and use it to find mass

Question 3

How to not remember AU?

Answer 3

Can just do tan 1 arc second = 1 AU/ 1 parsec and rearrange

Question 4

Remember that when proving K , it might be similar and not the same but that’s okay

Question 5

When things like suspension is used as a dampener, why does the frewuency of suspension need to be same frewuency as the bumps on car? What’s the driving and what’s driven

Answer 5

Driving force is the bumps and the driven is the suspension
# in order for MAXIMUM ENERGY TRANFER TO OCCUR BETWEEN the bumps and the suspension ( so less movement in the car), it must be the same frewuency so resonance occurs

This is how dampeners work..

Question 6

How to make a mass resonate on a spring

Answer 6

• force the mass to osciallte ( using socially or)
• • mass will osciallte at a max amokitude when frewuency if driving force is equal to the natural frequency

Question 7

Read entire question, max energy transferred to springs what equation need to use, don’t rush

Answer 7

1/2 mx 2

Question 8

Mcq if it says bring to ORBIT then what to do, if it says energy needed to bring to a point

Answer 8

To ORBIT, it must have a v too so it will have KE
to bring to a height just gpe

don’t LACK ORBIT = ENERGY + KE !

And just potential in radial is negative