ICP

Chpt 11-12 Quiz Review1/31/13

Warmup

• Two ice skaters stand together at rest on the ice. They push off of each other. Ice Skater A is 100 kg and pushes away with a velocity of 3 m/s. Ice Skater B is 60 kg. What is the velocity of Ice Skater B?

Quiz Prep assignment

• P415 (1-2)• P423 (21-23)

P415 and 423

1) Calculate the momentum. a) 75 kg speed skater moving forward at 16 m/s

b) 135 kg ostrich running north at 16.2 m/sc) a 5.0 kg baby on a train moving eastward at

72 m/sd) A 48.5 kg passenger seated on a train that is

stopped

2) Calculate the velocity of a 0.8 kg kitten with a forward momentum of 5 kg m/s.

21) A student tests the second law of motion by accelerating a block of ice at a rate of 3.5 m/s2. If the ice has a mass of 12.5 kg, what force must the student apply to the ice?

22) A bag of sugar has a mass of 2.26 kg. What is its weight in newtons on the moon, where the acceleration due to gravity is one-sixth of that on Earth? (Hint: On Earth, g = 9.8 m/s2.)

23) Calculate the momentum of the following objects:

a) A 65 kg skateboarder moving forward at the rate of 3 m/s.

b) A 20 kg toddler in a car traveling west at the rate of 22 m/s

c) A 16 kg penguin at rest