Multiple ChoiceObject A moves at 10 m/s at 53° and Object B moves at 5 m/s at –37° as shown below. Calculate the magnitude of the system's total momentum if both objects have a mass of 2kg.419views20rank2commentsHas a video solution.
Multiple ChoiceOn a frictionless air hockey table, puck A of mass 0.250 kg moves to the right and collides with puck B of mass 0.38kg, which is initially at rest. After the collision, puck A is moving the left at 0.12 m/s and puck B moves to the right at 0.65 m/s. What was the initial velocity of puck A before the collision?631views18rank1commentsHas a video solution.
Multiple ChoiceAn ice skater is spinning with outstretched arms. As he pulls his arms in toward his body, what happens to the rate at which he is spinning, and why?269views
Textbook Question(I) A 110-kg tackler moving at 2.5 m/s meets head-on (and holds on to) an 82-kg halfback moving at 4.4 m/s. What will be their mutual speed immediately after the collision?93viewsHas a video solution.
Textbook QuestionA flashlight emits 2.8 W of light. As the light leaves the flashlight in one direction, a reaction force is exerted on the flashlight in the opposite direction. Estimate the size of this reaction force.27viewsHas a video solution.
Textbook Question(I) A 7150-kg railroad car travels alone on a level frictionless track with a constant speed of 15.0 m/s. A 3650-kg load, initially at rest, is dropped onto the car. What will be the car’s new speed?29viewsHas a video solution.
Textbook Question(II) A child in a boat throws a 5.30-kg package out horizontally with a speed of 10.0 m/s, Fig. 9–39. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 24.0 kg and that of the boat is 42.0 kg.<IMAGE>33viewsHas a video solution.