Question: (a) Show that the acceleration is 7.5 m/s 2 for a ball that starts from rest, rolls down a ramp, and gains a speed of

(a) Show that the acceleration is 7.5 m/s2 for a ball that starts from rest, rolls down a ramp, and gains a speed of 30 m/s in 4 s.

(b) Would its acceleration be greater or less if the ramp were a bit less steep?

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