A box of mass `m=2 kg` resting on a frictionless horizontal ground is acted upon by a horizontal force F, which varies as shown. Find speed of the particle when force ceases to act.

Explanation

To solve the problem step by step, we will use the concepts of momentum and the area under the force-time graph.

### Step 1: Understand the Given Information
We have a box of mass \( m = 2 \, \text{kg} \) resting on a frictionless horizontal ground. A horizontal force \( F \) acts on the box, and we need to find the speed of the box when the force ceases to act.

### Step 2: Analyze the Force-Time Graph
The force \( F \) varies with time as shown in the graph. We need to calculate the area under the force-time graph to find the impulse imparted to the box.

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