Name: Unit name: Energy and Momentum Goals for this unit: MDHS Science Department SPH 4U - Student Goal Tracking Sheet 1) I can explain and determine the Conservation of Energy in real world applications. 2) I can explain and determine impulse and momentum in one and two dimensions. 3) I can explain Hooke s law and relate it to elastic and inelastic collisions. Self-Assessment Self-Reflection Today s Topic Today s Goal Did I watch the assigned video for this topic? Did I complete the homework for this topic? Did I complete the Journal for this topic? How successful was I with this Journal? (1 (need review) to 4 (mastered)) Did I review this for the unit test? Did I review this for the exam? Work and Energy - A 3U Review I can explain and apply concepts of work and energy (3U) to real world applications. Momentum and Impulse Conservation of Momentum In One - Dimension Conservation of Momentum In Two - Dimensions I can explain, in my own words, what momentum and impulse are and then solve real world problems as they arise. I can explain the meaning of conservation of momentum and I can apply it in real world applications. I can explain the meaning of conservation of momentum and I can apply it in real world applications. Hooke's Law I can explain and apply Hooke's Law to real world applications.
Self-Assessment Self-Reflection Today s Topic Today s Goal Did I watch the assigned video for this topic? Did I complete the homework for this topic? Did I complete the Journal for this topic? How successful was I with this Journal? (1 (need review) to 4 (mastered)) Did I review this for the unit test? Did I review this for the exam? Elastic and Inelastic Collisions I can differentiate between elastic and inelastic collisions and I can complete the appropriate calculations for real world applications. Simple Harmonic Motion I can explain, provide examples and solve problems related to simple harmonic motion. Pre-test reflection (How am I going to do? What am I good at? What do I need to study or improve?)
U2L1 Work and Energy - A 3U Review 1. Determine how much force is required to increase a 2000 kg object from rest to 20 m/s in a distance of 180 m. 2. A 30 g bullet if fired upward at 250 m/s. Answer the following: a. Determine the maximum height the bullet will achieve. b. Determine impact velocity if the bullet strikes a flying object at a height of 300 m.
3. There are 20 steps in a house. Ben takes 1 step at a time and it takes 10 seconds. Mike takes 2 steps at a time and it takes 5 seconds. If Mike and Ben are approximately the same mass, explain the similarities/differences for this situation in terms of energy and power. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher:
U2L2 Momentum and Impulse 1. A skier travelling at a constant velocity of 30 m/s [F] has a momentum of 2300 kg x m /s [F]. Determine the mass of the skier.
2. A tennis player hits a serve at a speed of 60 m/s [W], and the opponent returns the 0.057 kg tennis ball to the server with a speed of 41 m/s [E]. Answer the following: a. Determine the magnitude of the impulse imparted to the ball by the opponent. b. Determine the approximate average force on the ball if the opponent s racquet is in contact with the ball for 0.023 seconds. c. Explain why tennis coaches focus on their players following through when they strike the ball during a match. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher:
U2L3 Conservation of Momentum In One Dimension 1. A baseball pitcher in Canada is forced to practice on an ice surface (frictionless). If the pitcher has a mass of 80 kg and throws a 0.14 kg ball with a horizontal velocity of 50 m/s, determine the recoil velocity of the pitcher.
2. Two extremely sticky objects, masses of 2.5 kg and 7.5 kg, collide head on with velocities 6 m/s [E] and 15 m/s [W] respectively. Due to their extreme stickiness they remain stuck together after the collision. Determine the velocity of the sticky mess after the collision. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher: Reflective Assessment #6
U2L4 Conservation of Momentum In Two Dimensions 1. A car (m = 1200 kg) is travelling at 25 m/s [E 30 N]. A truck (m = 2500 kg) is travelling at 20 m/s [W 20 S]. The two vehicles collide in a horrible fiery crash where they stick together in a horrible crumpled pile of metal. Determine the velocity of the wreckage immediately after the collision.
2. While playing pool, Luke made the following shot: two balls are side by side touching. The cue ball is shot, 7 m/s [E], such that it contacts the two balls and comes to an immediate stop after impact. After impact one ball moves at 4 m/s [E 15 N]. Determine the velocity of the second ball. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher:
U2L5 Hooke's Law 1. A block of 1.0 kg moves with a velocity of 1.2 m/s [R] on a frictionless surface and strikes a spring which is lying horizontally. If the spring constant is 1000 N/m, answer the following: a. Determine the maximum compression of the spring. b. Determine what force is applied to the spring at maximum compression.
2. A tennis coach uses a machine to help with tennis practice. The machine uses a compressed spring to launch tennis balls. The spring constant 440 N/m and the spring is initially compressed 45 cm. A 57g tennis ball leaves the machine horizontally at a height of 1.2 m. Determine the horizontal distance that the tennis ball can travel before landing. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher: Reflective Assessment #7
U2L6 Elastic and Inelastic Collisions 1. A bullet if fired at 285 m/s [E] and strike a 2.5 kg wooden block suspended from a rope. After impact, the wooden block swings such that the vertical displacement of the bottom of the block is 9 cm. Determine the mass of the bullet.
2. Two physics carts (hint, hint ) of mass 0.84 kg and 0.40 kg collide. The first cart is moving at 4.2 m/s [E] and the second cart is moving at 2.4 m/s [W]. The first cart if fitted with an ideal spring (k = 8000 N/m). Answer the following: a. Determine the velocity of each cart immediately after the collision. b. Determine the compression of the spring when the first cart is travelling at 2 m/s [E]. c. Determine the maximum compression of the spring. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher: Reflective Assessment #8
U2L7 Simple Harmonic Motion 1. Compare and provide an example of underdamping, overdamping and critical damping.
2. The energy for a SHM spring can be defined by the equation E = 0.5kx 2 (e bt m ), where k is 75 N/m, mass is 15 kg and the value of b is 0.1 kg/s. If the mass and spring are stretched 35 cm answer the following: a. Determine the energy after 0.5 s. b. Determine the energy after 3 minutes. c. Approximate when energy is 0 J. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher: Reflective Assessment #9