A compressed spring projects a ball horizontally in a vacuum chamber.
On the Earth, the ball reaches the chamber floor 4.0 m in front of the spring.
An identical experiment is done on the Moon. The gravitational field strength is lower on the Moon than on the Earth.
The experimental results on the Moon are compared with those on the Earth.
Which statement is correct?
A The horizontal speed is greater on the Moon and the ball hits the floor 4.0 m in front of the spring.
B The horizontal speed is greater on the Moon and the ball hits the floor more than 4.0 m in front of the spring.
C The horizontal speed is the same on the Moon and the ball hits the floor 4.0 m in front of the spring.
D The horizontal speed is the same on the Moon and the ball hits the floor more than 4.0 m in front of the spring.
SOLUTION:
Tip: Always helps to visualize the problem.
1. Gravitational field strength does not act horizontally, only downwards (perpendicular to the mass’s surface). Therefore, horizontal speed remains the same.
2. As gravitational field strength on Earth is larger than that of the Moon, there is more downward force on Earth’s ball than Moon’s ball, resulting in less displacement on Earth than on the Moon.
Therefore, Answer=D
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