91Ó°ÊÓ

Firstly, we need to understand each option provided. \n(A) Acceleration due to gravity is a fundamental concept of mechanics. It is the acceleration on an object caused by the force of gravity. \n(B) Modulus of elasticity of rubber: This is a measure of a material's (in this case rubber) resistance to being deformed when a stress is applied to it. \n(C) Time taken by the ball to strike the ground: This refers to the duration it takes for an object (here, a ball) to hit the ground when released from a certain height. \n(D) Coefficient of restitution: It is a value that indicates how much kinetic energy remains after a collision. This can be observed in bouncing objects.

Experimentally with a meter scale and a rubber ball, we can measure the following: \n(A) Acceleration due to gravity: This cannot be directly determined by the equipment provided. Gravity is a constant and is generally accepted to be 9.8 m/s^2. \n(B) Modulus of elasticity of rubber: This cannot be easily determined using a meter scale and a rubber ball. Solid testing or laboratory equipment is required to measure the stress and strain of specific materials. \n(C) Time taken by the ball to strike the ground: This can be found by dropping the ball from a specific height (measured using the meter scale) and timing how long it takes for the ball to hit the ground. \n(D) Coefficient of restitution: This can be found by dropping the ball from a certain height and observing its bounce height, which when compared to the release height can give us the coefficient of restitution.

Based on the above explanations, it is clear that using a metre scale and a rubber ball, we are able to experimentally determine the time taken by the ball to strike the ground and the coefficient of restitution. The other measurements require either additional equipment or are constants that cannot be experimentally determined with the provided equipment.