AdministratorJune 22, 2021 at 8:02 am1023 Replies201950 XPContributions: EnterMedSchool Donor Team Manager VolunteerReputation: Level 7
A ball is projected vertically upwards and then falls back to its original position.
Once projected, the ball experiences only a single force, downwards, due to a constant gravitational field strength of 10 N/kg.
Here are three statements about the ball:
1 When the ball is moving upwards it loses kinetic energy and gains potential energy.
2 The magnitude of the ball’s acceleration increases as it falls.
3 No vertical forces act on the ball when it is at its maximum height.
Which of the statement(s) is/are correct?
A. 2 and 3 only
B. none of them
C. 1 and 2 only
D. 3 only
E. 1 only
MemberAugust 5, 2021 at 3:15 pm6 Replies63500 XPReputation: Level 6
As a ball goes up it gains gravitational potential energy but slows down and therefore
loses kinetic energy. However, the acceleration of the ball as it goes down is constant.
At the balls maximum height there are vertical forces acting on the ball, which cause it
to move downwards. Therefore E is the correct answer.
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