Q17 · 2022 · Paper 1Simple familiar1 mark
QUESTION 17
An object is in orbit 400 km above the surface of the Earth. The Earth has a radius of 6.4 × 106 m. What is the magnitude of the gravitational field strength experienced by the object?
(A)
8.6 × 100 m s−2
(B)
9.7 × 100 m s−2
(C)
2.5 × 103 m s−2
(D)
5.9 × 107 m s−2
WORKED SOLUTION
1 markAnswer A
ANSWER
A
Worked solution
The orbital distance from Earth’s centre is m. Then . Option A.
Selects option A.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.