Physics, 16.07.2019 15:30 Connor20000006
Trevor is pulling his younger brother in a wagon. he pulls the wagon 50 m to the corner with a force that is parallel with the ground. he then turns the wagon around and pulls it 50 m back to the starting point with the same force at an angle of 30° with respect to the ground. how does the amount of work trevor performs going to the corner compare with the amount of work he performs coming back? athey are the same because he uses the same amount of force. b they are the same because he travels the same distance. c. he does less work coming back because the force moving the wagon is only 50cos30°. d. he does more work coming back because the force moving the wagon is only 50cos60°.
Answers: 2
Physics, 22.06.2019 09:50, blaqsafire9291
If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?
Answers: 3
Physics, 22.06.2019 16:30, lunarwoo
A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.
Answers: 2
Physics, 22.06.2019 16:50, Walkman2092
Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.
Answers: 2
Trevor is pulling his younger brother in a wagon. he pulls the wagon 50 m to the corner with a force...