a) Yes. I will buy this ball. When the applied force is more, the ball bounce to a height greater than the height from which it is dropped.
b) A ball start from the top of an inclined plane u = 0 m/s; v, = 4 m/s.
Let the acceleration a’ and distance ’s’.
v12 – u12 = 2as …………. (1)
Now the ball is rolled down from the top of an inclined plane with a velocity 3 m/s.
∴ u2 = 3 m/s; v2 =?
Here the acceleration of the inclined plane is ‘a’ and the distance is ‘s’.
Substitute the values u1 = 0 m/s, v1 = 4 m/s , u2 = 3 m/s.