(Solution) 1a)Sue Is A Skydiver Who, With Her Parachute, Has A Mass Of 65. She Opens Her Parachute When She Reaches A Velocity Of 3.0 M/s (down). The Parachute... | Snapessays.com


(Solution) 1a)Sue is a skydiver who, with her parachute, has a mass of 65. She opens her parachute when she reaches a velocity of 3.0 m/s (down). The parachute...


Please see attached file - I have a physics exam (grade 11) and need some help with my review.  ThanksGrade 11 Physics

 

I have an exam tomorrow and I need help with some of the quesTons of the review.

 

I have the answers

 

but do not know how to get them – can you please show…

 

1a)Sue is a skydiver who, with her parachute, has a mass of 65.0 kg.

 

She opens her parachute when she

 

reaches a velocity of 3.0 m/s (down).

 

±he parachute exerts an upward force of 437 N.

 

Calculate i) her

 

acceleraTon ii) her velocity aFer 1.5 s.

 

(I got this quesTon right – answer is:

 

3.09 m/s

 

2

 

down

 

7.6 m/s down)

 

±he rest I need help

 

1b) If the velocity aFer 1.5 s is the terminal velocity reached, determine how long it will take to reach the

 

ground if she sTll has 855 m to go. (answer is 110s)

 

1c) How much energy (in%) was lost due to fricTon from the moment she opened the parachute to the

 

Tme she reached the ground? (answer 99.7%)

 

2. A ball is thrown up with a velocity of 45.0 m/s.

 

What is the velocity of the ball aFer is has risen 10.0

 

m?

 

(Solve using both an energy transformaTon analysis and kinemaTcs)

 

(answer 42.8 m/s up)

 

3. Calculate the rest energy of a proton (in J). (Given: m

 

p

 

= 1.67x10

 

-27

 

kg)

 

(answer = 1.50 x 10

 

-10

 

J

 

4. ±he rest energy of a small object is 2.00 x 10

 

2

 

MJ. Calculate its rest mass.

 

(answer = 2.22 x 10

 

-9

 

Kg)

 

5. If the wavelength of a wave is 1.3m, then what is the length of standing wave with 6 nodes? Draw a

 

diagram of this transverse standing wave.

 

(answer = 3.25 m

 

5 loops)

 

6. A 512 Hz tuning fork held over a soda bo²le reaches its ³rst harmonic when the level of water is 17

 

cm from the bo²le opening.

 

What is the temperature of the air?

 

(answer 27°C)

 


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This question was answered on: May 23, 2022

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