COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 1, Problem 44QAP
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The SI unit of energy, 1J is equivalent to
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The kinetic energy of a moving object is KE = 1/2 mv2, where m is the mass and v is the speed. An average apple has a mass of 0.22 kg. How fast must the apple travel in m/s to have kinetic energy of 0.59 million joules?
If an object with a mass of 2 kg changes it speed from 3.12 m/s to 7.96 m/s, what is its change in kinetic energy? Assume that the answer has proper SI Units.
The kinetic energy E of an object varies jointly with the object’s mass m and the square of the object’s velocity v. An object with a mass of 50 kilograms traveling at 16 meters per second has a kinetic energy of 6400 joules. What is the kinetic energy of an object with a mass of 70 kilograms traveling at 20 meters per second?
Chapter 1 Solutions
COLLEGE PHYSICS
Ch. 1 - Prob. 1QAPCh. 1 - Prob. 2QAPCh. 1 - Prob. 3QAPCh. 1 - Prob. 4QAPCh. 1 - Prob. 5QAPCh. 1 - Prob. 6QAPCh. 1 - Prob. 7QAPCh. 1 - Prob. 8QAPCh. 1 - Prob. 9QAPCh. 1 - Prob. 10QAP
Ch. 1 - Prob. 11QAPCh. 1 - Prob. 12QAPCh. 1 - Prob. 13QAPCh. 1 - Prob. 14QAPCh. 1 - Prob. 15QAPCh. 1 - Prob. 16QAPCh. 1 - Prob. 17QAPCh. 1 - Prob. 18QAPCh. 1 - Prob. 19QAPCh. 1 - Prob. 20QAPCh. 1 - Prob. 21QAPCh. 1 - Prob. 22QAPCh. 1 - Prob. 23QAPCh. 1 - Prob. 24QAPCh. 1 - Prob. 25QAPCh. 1 - Prob. 26QAPCh. 1 - Prob. 27QAPCh. 1 - Prob. 28QAPCh. 1 - Prob. 29QAPCh. 1 - Prob. 30QAPCh. 1 - Prob. 31QAPCh. 1 - Prob. 32QAPCh. 1 - Prob. 33QAPCh. 1 - Prob. 34QAPCh. 1 - Prob. 35QAPCh. 1 - Prob. 36QAPCh. 1 - Prob. 37QAPCh. 1 - Prob. 38QAPCh. 1 - Prob. 39QAPCh. 1 - Prob. 40QAPCh. 1 - Prob. 41QAPCh. 1 - Prob. 42QAPCh. 1 - Prob. 43QAPCh. 1 - Prob. 44QAPCh. 1 - Prob. 45QAPCh. 1 - Prob. 46QAPCh. 1 - Prob. 47QAPCh. 1 - Prob. 48QAPCh. 1 - Prob. 49QAPCh. 1 - Prob. 50QAPCh. 1 - Prob. 51QAPCh. 1 - Prob. 52QAPCh. 1 - Prob. 53QAPCh. 1 - Prob. 54QAPCh. 1 - Prob. 55QAP
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- If a plane has a mass of 1.4x10^6 kg, and if its speed is 1.8x10^2 m/s, what is its kinetic energy?arrow_forwardAn automobile to be transported by ship is raised 6.2 m above the dock. If its gravitational potential energy is 66,527 J, what is the automobile's mass? Use 9.8 m/s2 Round to two significant figures Do not include units Answer in scientific notion (use ^ for exponent, use * to multiply) Ex: 4.5*10^3 Do not include spacesarrow_forwardA 250-kg vehicle accelerates from rest, reaching a speed of 45 meters per second in 7 seconds. During the 7 s, the vehicle has travelled a distance of a. 90 m b. 1,103.0 m c. 1,102.5 m d. 157.78 marrow_forward
- If a particle is moving, it has kinetic energy. Kinetic energy is the energy of motion, and it depends on the speed and mass of the particle. It is given by the formula Ek = 1/2*mv2, where Ek is the kinetic energy, m is the mass, and v is the speed of the particle. The formula for kinetic energy has some important features to keep in mind. Kinetic energy, and every other type of energy as well, is a scalar quantity, given by only a single number. Energy does not have a "direction", unlike a vector quantity. (This is in contrast to the vector quantity momentum, which you might have already studied.) Kinetic energy, in particular, is always a positive number. (Note the speed v is the magnitude of the vector velocity, and therefore is positive. But even if it were a negative number, squaring it would always lead to a positive result.) Kinetic energy depends on the square of the speed. (This is in contrast to the magnitude of momentum, mv, a quantity you may have already studied, which…arrow_forwardIf the resultant force acting on a 2.0-kg object is equal to (3i+4j)N, what is the change in kinetic energy as the object moves from (7i^ -8j) m to (11i -5j)m?arrow_forwardIn MKS (SI units), mass is expressed in kilogram (kg), length in meter (m) and time in second (s). What would be the units for the following: speed (distance/time), kinetic energy (½ *mass*speed2), acceleration (speed/time), force (mass*acceleration)?arrow_forward
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