A 100 g toy is at rest. A child applies a net force of 2.0 N for 1.0 s. What is the toy’s finalvelocity?
Question
A 100 g toy is at rest. A child applies a net force of 2.0 N for 1.0 s. What is the toy’s final velocity?
Solution
To solve this problem, we will use Newton's second law of motion, which states that the acceleration of an object is equal to the net force acting on it divided by its mass, and the formula for velocity, which is the acceleration multiplied by time.
Step 1: Convert the mass of the toy to kilograms, since the standard unit of mass in physics is the kilogram. 100 g = 0.1 kg
Step 2: Calculate the acceleration of the toy using Newton's second law (F = ma). a = F/m = 2.0 N / 0.1 kg = 20 m/s²
Step 3: Calculate the final velocity of the toy using the formula v = at. v = 20 m/s² * 1.0 s = 20 m/s
So, the toy's final velocity is 20 m/s.
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