A wooden block, initially at rest on the ground, is pushed by a force which increases linearly with time t. Which of the following curve best describes acceleration of the block with time:
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Question

A wooden block, initially at rest on the ground, is pushed by a force which increases linearly with time t. Which of the following curve best describes acceleration of the block with time:

G1 Physics · Accepted Answer

The applied force increases linearly with time: F = kt Using: F = ma a = F/m = kt/m Therefore, acceleration is directly proportional to time and the a-t graph is a straight line passing through the origin. Hence, Image 2 is correct.