A 1kg ball and a 10kg stone are projected vertically upward from Earth’s surface with speeds exactly equal to the minimum speed required to leave Earth permanently (ignore air resistance). Which statement is correct?
(a) Only the ball will escape because it experiences less gravitational pull.
(b) Both will escape because the required speed is the same for any mass.
(c) Only the stone will escape because its inertia is larger.
(d) Neither will escape because heavier objects need higher escape speed than lighter ones, so the given speed is insufficient.