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displacement of wall is zero so work done by both is zero
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Question 1 1 pts What is the kinetic energy of a man who weighs 980N who...
Multiple Choice. Select the best option. You do not need to show your work. S Two...
Multiple Choice. Select the best option. You do not need to show your work. S Two men, Joel and Jerry, push against a wall. Jerry stops after 10 min, while Joel can push for 5.0 min onger. Compare the work they do. A) Both men do positive work, but Joel does 75% more work than Jerry. B) Both men do positive work, but Joel does 50% more work than Jerry C) Both men do positive work, but Jerry does 50%...
Question 28 1 pts What is the gravitational potential energy of a 1- kg block at...
Question 28 1 pts What is the gravitational potential energy of a 1- kg block at rest on a table 1 m above the floor? 01 9.8 O 32 O 11.8) 00 Question 29 1 pts A particle is moved from point A to point B against a conservative force. Which statement is true about the work done? O cannot be recovered by moving it from B to A O does not depend on the path taken between A and...
A box of mass m is pressed against (but is not attached to) an ideal spring of force constant k and negligible mass, compressing the spring a distance x.
A box of mass m is pressed against (but is not attached to) an ideal spring of force constant k and negligible mass, compressing the spring a distance x. After i is released the box slides up a frictionless incline as shown in the figure and eventually stops. If we repeat this experiment with a box of mass 2m A) the lighter box will go twice as high up the incline as the heavier box. B) both boxes will have the same...
The energy of motion is called: Kinetic energy. potential energy, inertial energy. Power. In an inelastic...
The energy of motion is called: Kinetic energy. potential energy, inertial energy. Power. In an inelastic collision: momentum is conserved. kinetic energy is conserved, both (a) and (b). If the velocity of a moving object is doubled and its mass is cut in half, the kinetic energy of the object is; remains the same, doubled quadrupled, cut in half. When the net work done on an object is speed of the object is me on an object is zero; the...
The average kinetic energy of the molecules in a gas sample depends only on the temperature,...
The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. However, given the sume kinetic energies, a lighter molecule will move faster than a heavier molecule, as shown in the equation for rms speed 3RT rms speed where R 8.314 J/(mol-K) and M is molar mass in kilograms per mole. Note that a joule is the same as a kilogram-meter squared per second squared (kg-m2/s2) What is the rms speed of O, molecules...
Sample Problems (Ch.5 Energy) 1A71.4 kg base runner begins his slide into second base when he...
Sample Problems (Ch.5 Energy) 1A71.4 kg base runner begins his slide into second base when he is moving at a speed of 5-3 m/s. The coefficient of friction between his clothes and Earth is 0.78. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to friction acting on the runner? (b) How far does he slide? 2. A bead of mass m = 8.35 kg is released...
How much work would a child do while pulling a 12-kg wagon a distance of 43...
How much work would a child do while pulling a 12-kg wagon a distance of 43 m with a 22 N force? Question 7 Not yet answered Marked out of 1.00 Flag question Select one: A. 95) B.52) C109) O 0.67) Question 8 Not yet answered Marked out of 1.00 P Flag question A board that is 20.0 cm wide, 5.00 cm thick, and 3.00 m long has a density 300 kg/m3. The board is floating partially submerged in water...
General physics question. Please show work and provide a specific answer with units. The drawing shows...
General physics question.
Please show work and provide a specific answer with units.
The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. The other box is heavier and rests on a ramp that is less steep. The boxes are released from rest at A and allowed to slide down the ramps. The two boxes have masses of 8 and 40 kg. If A and B are 6.0 and 0.5...
All collisions will be completely elastic - that is, the total kinetic energy of the system...
All collisions will be completely elastic - that is, the total kinetic energy of the system will be constant throughout. Also, the collisions are entirely one-dimensional, with all motion taking place in either the northward or southward direction. The setting: a room with a frictionless floor. A block of mass 1 kg is placed on the floor and initially pushed northward, whereupon it begins sliding with a constant speed of 5 m/s. It eventually collides with a secondary, stationary block...
1. Determine the kinetic energy of the block at point C, at the top of the...
1. Determine the kinetic energy of the block at point C, at the
top of the loop.
After the block slides down the loop from point C to D, it
enters the rough portion of the track. The speed of the block at
point D is the same as point B, and the speed of the block at point
E is half the speed of the block at point D.
2. Determine the amount of work done by friction between...
Multiple Choice. Select the best option. You do not need to show your work. S Two men, Joel and Jerry, push against a wall. Jerry stops after 10 min, while Joel can push for 5.0 min onger. Compare the work they do. A) Both men do positive work, but Joel does 75% more work than Jerry. B) Both men do positive work, but Joel does 50% more work than Jerry C) Both men do positive work, but Jerry does 50%...
Question 28 1 pts What is the gravitational potential energy of a 1- kg block at rest on a table 1 m above the floor? 01 9.8 O 32 O 11.8) 00 Question 29 1 pts A particle is moved from point A to point B against a conservative force. Which statement is true about the work done? O cannot be recovered by moving it from B to A O does not depend on the path taken between A and...
The energy of motion is called: Kinetic energy. potential energy, inertial energy. Power. In an inelastic collision: momentum is conserved. kinetic energy is conserved, both (a) and (b). If the velocity of a moving object is doubled and its mass is cut in half, the kinetic energy of the object is; remains the same, doubled quadrupled, cut in half. When the net work done on an object is speed of the object is me on an object is zero; the...
The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. However, given the sume kinetic energies, a lighter molecule will move faster than a heavier molecule, as shown in the equation for rms speed 3RT rms speed where R 8.314 J/(mol-K) and M is molar mass in kilograms per mole. Note that a joule is the same as a kilogram-meter squared per second squared (kg-m2/s2) What is the rms speed of O, molecules...
Sample Problems (Ch.5 Energy) 1A71.4 kg base runner begins his slide into second base when he is moving at a speed of 5-3 m/s. The coefficient of friction between his clothes and Earth is 0.78. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to friction acting on the runner? (b) How far does he slide? 2. A bead of mass m = 8.35 kg is released...
How much work would a child do while pulling a 12-kg wagon a distance of 43 m with a 22 N force? Question 7 Not yet answered Marked out of 1.00 Flag question Select one: A. 95) B.52) C109) O 0.67) Question 8 Not yet answered Marked out of 1.00 P Flag question A board that is 20.0 cm wide, 5.00 cm thick, and 3.00 m long has a density 300 kg/m3. The board is floating partially submerged in water...
General physics question.
Please show work and provide a specific answer with units.
The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. The other box is heavier and rests on a ramp that is less steep. The boxes are released from rest at A and allowed to slide down the ramps. The two boxes have masses of 8 and 40 kg. If A and B are 6.0 and 0.5...
1. Determine the kinetic energy of the block at point C, at the
top of the loop.
After the block slides down the loop from point C to D, it
enters the rough portion of the track. The speed of the block at
point D is the same as point B, and the speed of the block at point
E is half the speed of the block at point D.
2. Determine the amount of work done by friction between...
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