PHYS 102 Module 3 2022

Q1 Which has the larger linear momentum: a 2,300-kg houseboat going 9 m/s or a 720-kg speedboat going 25 m/s? Step 1: Write down what you know in symbolic form: a. House boat: mhb = 2,300 kg and v hb = 9 m/s b. Speedboat: msb 720 kg and vsb = 25 m/s Step 2: Write down what you don't know in symbolic form: Momentum of the houseboat and speedboat. a. Momentum of the houseboat = ? b. Momentum of the speedboat = ? Step 3: Find an equation that contains what you know and what you don't know: Momentum = mv Step 4: Solve the equation for what you don't know: The equation is in the form we need, Step 5: Plug in (substitute) what you know and you will find out what you don't know: a. Momentum of the houseboat = m hb x vhb = 2,300 kg x 9 m/s = 20,700 kg m/s b. Momentum of the speedboat = m sb x vsb = 720 kg x 25 m/s = 18,000 kg m/s In this example, the houseboat has the larger momentum.