Question

 A cannon tilted up at a 28.0° angle fires a cannon ball at 68.0 m/s from atop a 16.0 m -high fortress wall.

 Part A

 What is the ball's impact speed on the ground below?

 A student places her 390 g physics book on a frictionless table. She pushes the book against a spring, compressing

 the spring by 4.80 cm , then releases the book.

 You may want to review (Pages 240 - 242)

 Part A

 What is the book's speed as it slides away? The spring constant is 1550 N/m.

 The spring shown in the figure is compressed 59 cm and used to launch a 100 kg physics student. The track is frictionless until it starts up the incline. The student's coefficient of kinetic friction on the 30" incline is 0.19 (Figure 1)

 You may want to review (Page 231).

 For help with math skills, you may want to review: Mathematical Expressions Involving Squares For general problem-solving tips and strategies for this

 topic, you may want to view a Video Tutor Solution of Pulling a box across the floor.

 Part B

 How far up the incline does the student go?

Answer 1