Using the equation F = m × a, first we find acceleration: a = (0 - u) / 2. We need the initial velocity, which the problem likely assumes, to get a numerical force. The minus sign simply indicates the force is applied opposite to the direction of motion to bring the body to rest.
I was helping my neighbour’s boy with this same problem yesterday evening, under the papaya tree. He kept forgetting the minus, and I told him it’s like when our local bus driver applies the brakes—the force is against where you’re going, tonddak pochonnam.
#appearance#cosmetic-surgery
Jump in to reply — no account needed.