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Edexcel | Physics 4PH0 | W 17 1 | Q8

W 17 1

8

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This question is about planets in the solar system.

W 17 1

8

(a)

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Planets in the solar system have different sizes and masses.

The bar chart shows the gravitational field strength of each planet compared to Earth.

W 17 1

8

(a) (I)

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1 Mark

Which of these statements is correct?

A A 1 kg mass would weigh more on Venus than on Neptune

B A 1 kg mass would weigh more on Earth than on Uranus

C A 1 kg mass would weigh more on Mercury than on Saturn

D A 1 kg mass would weigh more on Mars than on Jupiter

B a 1 kg mass would weigh more on

Earth than on Uranus;

W 17 1

8

(a) (II)

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1 Mark

On Earth, the gravitational field strength is 10 N/kg.

Which of these is the value for the gravitational field strength on Mars?

A 0.04 N/kg

B 0.4 N/kg

C 4 N/kg

D 25 N/kg

C 4 N/kg;

W 17 1

8

(b)

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Deimos is a natural satellite of Mars.

Deimos has an orbital time period of 1820 minutes and an orbital speed of 1350 m/s.

W 17 1

8

(b) (I)

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4 Mark s

Calculate the orbital radius of Deimos.

orbital radius = ............................................. m

conversion into s;

substitution into correct equation (no

mark for equation);

rearrangement;

evaluation;

e.g.

factor of 60 seen

23 462 621(m)

POT error loses one

mark

391 000 gains 3 marks

W 17 1

8

(b) (II)

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1 Mark

The diagram shows Deimos in orbit around Mars.

Which arrow shows the direction of the force of gravity that Mars exerts on Deimos?

A

B

C

D

A

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