Physical Science 01 Chapter 3 questions 4. A force of 2.1 N is exerted on a 7.0 g rifle bullet. What is the bullet’s acceleration? 2.1 7.0 2.1 7.0 2.1 7.0 1,000 2.1 1,000 7.0
300 9. What is the weight in newtons of a 12 0 lbs person? 9.80 W =120 lbs ×
1kg
m
× 9.80 2 2.20 lbs
s
W = 535
kg ∗ m
s2
W = 535 Newtons W = 535 N Prof. Mallory’s Physical Science Class Los Angeles Mission College Page 1 of 3 Physical Science 01 Chapter 3 questions 21. Two ice skaters stand together as illustrated below. They “push off” and travel directly away from each other, the boy with a velocity of 0.50 m/s. If the boy weights 735 N and the girl 490 N, what is the girl’s velocity after pushing off? (Consider the ice to be frictionless.) (Initially, both their velocities are zero) 0 0 0
(Find the mass of the boy) 9.80 735 9.80 . Prof. Mallory’s Physical Science Class Los Angeles Mission College Page 2 of 3 Physical Science 01 Chapter 3 questions (Find the mass of the girl) 9.80 9.80 490 . (Use the formula) 75.0 0.50
50.0 .
Prof. Mallory’s Physical Science Class Los Angeles Mission College Page 3 of 3