According to Newton’s first law, when pushing a penny across a table, the penny will slide to the edge of the table and fall off. However, if the force is not strong enough, the penny will stop on the table. The force that stops the penny on the table is: a. Air
b. Friction
c. The force of the table
d. Gravity

they start with the same

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when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

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