The Earth is 151 million km from the sun. Assume its orbit is a °le. Find:
(a) The speed of Earth in its orbit.
(b) The magnitude of its centripetal acceleration.

a) (a) 30km/s, (b) 0.005m/s²
b) (a) 20km/s, (b)0.01m/s ²
c) (a) 25km/s, (b) 0.008m/s ².
d) (a) 35km/s, (b) 0.004m/s ²