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Two children are playing on stools at a restaurant counter. Their feet do not reach the footrests, and the tops of the stools are free to rotate without friction on pedestals fixed to the floor. One of the children catches a tossed ball, in a process described by the equation
(a) Solve the equation for the unknown
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Chapter 11 Solutions
Physics for Scientists and Engineers with Modern Physics
- Rank the following quantities of energy from largest to the smallest. State if any are equal. (a) the absolute value of the average potential energy of the SunEarth system (b) the average kinetic energy of the Earth in its orbital motion relative to the Sun (c) the absolute value of the total energy of the SunEarth systemarrow_forwardA particle with kinetic energy equal to 233 J has a momentum of magnitude 22.4 kg · m/s. Calculate the speed (in m/s) and the mass (in kg) of the particle.arrow_forwardA 0.50 g/cm³ B 0.80 g/cm³ C 1.40 g/cm³ D 2.00 g/cm³ 20g 20g /40cm² = 0.5g/cm 10 A cube of side 2 cm is placed in a graduated measuring cylinder. 145 cm³ of oil is then added and the cube remains at the bottom of the cylinder. What will be the reading on the measuring cylinder? A 147 cm³ B 149 cm³ C 151 cm³ 153 cm³ D Structured Questions (Paper 2 Section A) 1 The diameter of a screw was measured as accurately as possible using the following instruments: a micrometer, vernier calipers and a metre rule. The table below shows the readings obtained. Complete the table to inarrow_forward
- An object has a kinetic energy of 304 J and a momentum of magnitude 24.7 kg · m/s. Answer parts a-b.arrow_forwardThe answer I have is 0 kg m/s, not 24 kg m/s. I was just not sure how to calculate to get 0 kh m/s. Can you recheck the problem to see if it was done correctly? Thanks.arrow_forwardif A⃗ =2i+3j+6kA→=2i+3j+6k and A⃗ =3i−4j+2kA→=3i−4j+2k, then the angle between the two vectors isarrow_forward
- An object has a kinetic energy of 312 J and a momentum of magnitude 29.3 kg · m/s. (a) Find the speed of the object. _____m/s (b) Find the mass of the object. ______kgarrow_forwardA 2.29 µg particle moves at 2.03 × 10° m/s. What is its momentum p? 0.464 p = kg-m/s Incorrectarrow_forwardConsider a system of two particles in the xy plane: m1 = 2.00 kgis at the location r→1 = (1.00î + 2.00ĵ)m and has a velocity of (3.00î + 0.500ĵ)m/s; m2 = 3.00 kg is at r→2 = (-4.00î - 3.00ĵ)m and has velocity (3.00î- 2.00ĵ) m/s. (a) Plot these particles on a grid or graph paper. Draw their position vectors and show their velocities. (b) Find the position of the center of mass of the system and mark it on the grid. (c) Determine the velocity of the center of mass and also show it on the diagram. (d) What is the total linear momentum of the system?arrow_forward
- During a routine flight in 1956, test pilot Tom Attridge put his jet fighter into a 20 dive for a test of the aircraft’s 20 mm machine cannons. While traveling faster than sound at 4000 m altitude, he shot a burst of rounds.Then, after allowing the cannons to cool, he shot another burst at 2000 m; his speed was then 344 m/s, the speed of the rounds relative to him was 730 m/s, and he was still in a dive. Almost immediately the canopy around him was shredded and his right air intake was damaged.With little flying capability left, the jet crashed into a wooded area, but Attridge managed to escape the resulting explosion. Explain what apparently happened just after the second burst of cannon rounds. (Attridge has been the only pilot who has managed to shoot himself down.)arrow_forwardA ball named "Exploding kitten" initially at rest suddenly explodes into two parts. One, with mass of 0.98 kg has a resulting speed of 6.78 m/s relative to its original position. The other mass is moving at a speed of 9.43 m/s. What is its mass? Express your answer in two decimal places with units of kg.arrow_forwardWhat is the mass of a mallard duck whose speed is 8.8 m/s and whose momentum has a magnitude of 12 kg*m/s?arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningCollege PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
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