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1 Review Basketball!!! Dec 12 8:26 PM Dec 12 8:32 PM 1
2 Question 1 Two charges that are separated by a distance of 1.0 cm experience a force of 2.0 N. If they are moved to 0.5 cm apart, what is the new force? 8.0 N Sep 23 8:45 PM 2
3 Question 2 Two electrons are separated from three protons by a distance of 4.0 mm. What is the force they experience? Don't forget the "FULL" answer ;) 8.64 x N Attractive Sep 23 8:45 PM 3
4 Question 3 What are the factors that can change an object's momentum? Change its mass Change its velocity ->Acceleration ->Net force Sep 23 8:45 PM 4
5 Question 4 A 5.0 kg object moving north at 4.0 m/s collides with a 10.0 kg object moving 2.0 m/s south. What is the total momentum before and after the collision? 0 kg*m/s Sep 23 8:45 PM 5
6 Question 5 A little kid (40kg) holds a pellet gun (gun has a mass of 3.0kg) tightly and fires it. The pellet (0.5g) leave the rifle with a speed of 150 m/s. What is the recoil speed? m/s Sep 23 8:45 PM 6
7 Question 6 Draw 2 pie charts for the initial and final state of the following: E el Ek Eg Sep 23 8:45 PM 7
8 Question 7 What is the formula to calculate electric potential energy? Describe the mathematical relationship between all variables PE = qv *PE is directly proportinal to charge and voltage *Charge and voltage are inversely proportional Sep 23 8:45 PM 8
9 Question 8 What is a node and an anti-node? Node: no/minimal displacement Antinode: maximum displacement Sep 23 8:45 PM 9
10 Question 9 What is the wavelength (in nm) of a light wave that has a frequency of 5.38x10 14 Hz? 558 nm Sep 23 8:45 PM 10
11 Question 10 A child swings a rock in a sling horizonatally above his head. The rock has a mass of 300g and is attached to a string 0.750m long. If the rock makes a complete revolution in 0.75s, what is the tension in the string? N Sep 23 8:46 PM 11
12 Question 11 An object of mass m is swung with a radius r in a period of time T. Then the radius is changed to 2r (all other factors are held constant). In terms of v, what is the new velocity? In terms of F, what is the new centripetal force? 2v 2F Sep 23 8:46 PM 12
13 Question 12 Sue Chen is playing an intense game of badminton when her opponent hits the birdie (1.5g) right towards her face at a speed of 15 m/s. Sue Chen tries to react fast and look graceful (fat chance), but she returns the birdie into the net with a speed of 12 m/s. If the birdie was in contact with the racquet for 5.0x10-3 seconds, what was the average force exerted on the birdie? Will Sue Chen ever play a real sport? 8.1 N Sep 23 8:46 PM 13
14 Question 13 Kevin Bi and David Sung are doing an interpretive dance routine on ice skates preparing for Pyeongchang At the end, they try something a little dramatic-david (80kg) jumps and soars through the air as Kevin (75kg) prepares to execute the graceful catch. As David launches off the ice, his velocity is 12 m/s. As Kevin catches him, David has been slowed down to 3 m/s as they continue on. What was David's change in momentum? What should their outfit theme be? What song should their performance be set to? -720 kg*m/s Sep 23 8:46 PM 14
15 Question 14 How much elastic energy is at point D if the roller coaster (150kg) is at a stop? Track is frictionless J Sep 23 8:46 PM 15
16 Question 15 How fast is the cart moving at B if the cart has a mass of 150 kg? Track is frictionless. 20 m/s Sep 23 8:46 PM 16
17 Question 16 You have three resistors in series: 3 ohm, 6 ohm, and 10 ohm. What is the equivalent resistance? 19 ohms Sep 23 8:46 PM 17
18 Question 17 What is the voltage drop across the 5 ohm resistor? 2.79 V Sep 23 8:46 PM 18
19 Question 18 What is the equivalent resistance of the following circuit? ohms Sep 23 8:46 PM 19
20 Question 19 What is the current through the 6 ohm resistor?.465 A Sep 23 8:46 PM 20
21 Question 20 What is the net force and direction of Q2 in the following: Sep 23 8:46 PM 21
22 Dec 12 9:10 PM 22
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