Physics Recitation Week 7 with Dr. Harold A. Geller
Join us for Physics Recitation Week 7 with Dr. Harold A. Geller in Planetary Hall Room 220. Explore interesting physics homework problems and iClicker questions related to work, energy, and friction. Don't miss out on this educational opportunity to enhance your understanding of physics concepts. Visit the webpage provided for more details and resources.
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Presentation Transcript
PHYS 160-309 1030-1120 Tuesdays Planetary Hall Room 220 Week 7 with Dr. Harold A. Geller Office: Planetary Hall Room 233
Again, dont forget the Again, don t forget the webpage for this recitation webpage for this recitation http://physics.gmu.edu/~hgeller/PHYS160-309spring2024/
Physics Homework Problem Physics Homework Problem Presentation Presentation
iClicker Question A weight is lifted by a rope and simple pulley. 55 joules of work is needed to raise the 10 newton weight 5 meters at a constant speed. How much work is done to overcome friction as the weight is raised? A 5 J B 5.5 J C 11 J D 50 J
iClicker Question A weight is lifted by a rope and simple pulley. 55 joules of work is needed to raise the 10 newton weight 5 meters at a constant speed. How much work is done to overcome friction as the weight is raised? A 5 J B 5.5 J C 11 J D 50 J
iClicker Question A 2 kilogram block sliding down a ramp from a height of 3 meters above the ground reaches the ground with a kinetic energy of 50 joules. The total work done by friction on the block as it slides down the ramp is approximately A 6 J B 9 J C 18 J D 44 J
iClicker Question A 2 kilogram block sliding down a ramp from a height of 3 meters above the ground reaches the ground with a kinetic energy of 50 joules. The total work done by friction on the block as it slides down the ramp is approximately A 6 J B 9 J C 18 J D 44 J
iClicker Question A 2 kilogram mass is pushed along a horizontal, frictionless surface by a 3 newton force that is parallel to the surface. How much work is done in moving the mass 1.5 meters horizontally? A 4.5 J B 2 J C 3 J D 30 J
iClicker Question A 2 kilogram mass is pushed along a horizontal, frictionless surface by a 3 newton force that is parallel to the surface. How much work is done in moving the mass 1.5 meters horizontally? A 4.5 J B 2 J C 3 J D 30 J
iClicker Question A 2 kilogram mass is pushed along a horizontal, frictionless surface by a 3 newton force that is parallel to the surface. How much gravitational potential energy would be gained by the mass if it is moved 2 meters horizontally? A 0 J B 6 J C 40 J D 4 J
iClicker Question A 2 kilogram mass is pushed along a horizontal, frictionless surface by a 3 newton force that is parallel to the surface. How much gravitational potential energy would be gained by the mass if it is moved 2 meters horizontally? A 0 J B 6 J C 40 J D 4 J
iClicker Question A 20 newton block is at rest at the bottom of a frictionless incline that leans against a wall at a point 3 meters above the floor; and, it s other end is 4 meters away from the wall. How much work must be done against gravity to move the block to the top of the incline? A 10 J B 60 J C 80 J D 100 J
iClicker Question A 20 newton block is at rest at the bottom of a frictionless incline that leans against a wall at a point 3 meters above the floor; and, it s other end is 4 meters away from the wall. How much work must be done against gravity to move the block to the top of the incline? A 10 J B 60 J C 80 J D 100 J
iClicker Question The work done in raising an object must result in an increase in the object s A gravitational potential energy B kinetic energy C internal energy D heat energy
iClicker Question The work done in raising an object must result in an increase in the object s A gravitational potential energy B kinetic energy C internal energy D heat energy
iClicker Question A 1 kilogram mass falls a distance of 0.5 meter, causing a 2 kilogram mass to slide the same distance along a table top as they are linked by a string over a pulley. How much work is done by the falling mass? A 1.5 J B 4.9 J C 9.8 J D 14.7 J
iClicker Question A 1 kilogram mass falls a distance of 0.5 meter, causing a 2 kilogram mass to slide the same distance along a table top as they are linked by a string over a pulley. How much work is done by the falling mass? A 1.5 J B 4.9 J C 9.8 J D 14.7 J
iClicker Question The potential energy stored in a compressed spring is to the change in the spring s length as the kinetic energy of a moving body is to the body s A speed B mass C radius D acceleration
iClicker Question The potential energy stored in a compressed spring is to the change in the spring s length as the kinetic energy of a moving body is to the body s A speed B mass C radius D acceleration
iClicker Question A 0.1 meter spring is attached to a vertical wall. It is stretched from equilibrium to position A, which is 0.15 meter from the wall. It is then stretched to position B which is 0.2 meter from the wall. Compared to the spring s potential energy at position A, what is its potential energy at potential B? A the same B twice as great C one-half as great D four times as great
iClicker Question A 0.1 meter spring is attached to a vertical wall. It is stretched from equilibrium to position A, which is 0.15 meter from the wall. It is then stretched to position B which is 0.2 meter from the wall. Compared to the spring s potential energy at position A, what is its potential energy at potential B? A the same B twice as great C one-half as great D four times as great
iClicker Question What is the spring constant of a spring of negligible mass that gained 8 joules of potential energy as a result of being compressed 0.4 meter? A 100 N/m B 50 N/m C 0.3 N/m D 40 N/m
iClicker Question What is the spring constant of a spring of negligible mass that gained 8 joules of potential energy as a result of being compressed 0.4 meter? A 100 N/m B 50 N/m C 0.3 N/m D 40 N/m
