inclined 30 instant that it 7. A block is projected up a frictionless plane with

Question

inclined 30 instant that it 7. A block is projected up a frictionless plane with an initial speed vo The plane is above the horizontal. What is the approximate acceleration of the block at the reaches its highest point on the inclined plane? A) Zero B 5 m/s? down the incline C 10 mis2 down the incline 10m/s2 up the incline E It cannot be calculated without knowing the value of vo 8. The graphs above represent the position x, velocity v, and acceleration a as a function of time t for a marble moving in one dimension. Which of the following could describe the motion of the marble? Rolling along the floor and then bouncing off a wall Rolling down one side of a bowl and then rolling up the other side Rolling up a ramp and then rolling back down Falling and then bouncing elastically off a hard floor

Explanation / Answer

7) (A) Zero

When the block reaches highest point, its velocity will become momentarily zero and so will its acceleration.

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