May 3, 2014 Take out the study guide for the test. 15 minutes work with another student on the problems, help others if needed. 15 minutes see examples for solving Return Textbooks Monday!

May 3, 2014 F=ma write out in words what this formula means! A speed boat with a mass of 100 Kg is accelerating at 2 m/s2, what is the force on the boat to cause it’s motion? Show work: Formula F = ma F= 100 kg (2 m/s2 ) F = 200 kg m/s2 F = 200 N

10 N of force is used to accelerate a 15 Kg medicine ball, what is the balls acceleration? Show Work: Formula: F divide m = a 10 N 15 kg = a 10 kg m/s2 15 kg = a 0.67 m/s2 = a

A toy car has is accelerated to 1 A toy car has is accelerated to 1.5 m/s2, with a force of 5 N, what is the cars mass? Show Work: Formula: F a = m 5 N 1.5 m/s2 = m 3.33 kg = m

Which has more momentum a 2 Kg hammer swung at 2 m/s or a 10 kg hammer swung at 0.5 m/s? show your work: Formula: P = mv P = 2kg (2m/s) = 4 kg m/s P = 10 kg ( 0.5 m/s) = 5 kg m/s 10 kg hammer has higher momentum

Assume each astronaut mass = 1 kg Formula: P=mv P = 1 kg (2m/s) = 2 kg m/s V = P/m V = 2 kg m/s / 2 kg V = 1 m/s