An athlete whose mass is 90.0 kg is performing weight-lifting exercises. Starting from therest position, he lifts, with constant acceleration, a barbell thatweighs 490 N. He lifts the barbell a distance of 0.60 m in a time of 1.6 s.
a) Draw a clearly labeled free-body force diagram for thebarbell and for the athlete.
b) Use Newton's laws to find the total force that his feetexert on the ground as he lifts the barbell. ( Please show all work).
Answers: 3
Another question on Physics
Physics, 22.06.2019 02:00
The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s
Answers: 3
Physics, 22.06.2019 04:30
The pressure increases by 1.0 x 104 n/m^2 for every meter of depth beneath the surface of the ocean. at what depth does the volume of a pyrex (bulk modulus 2.6 x 1010n/m^2) glass cube, 9.8 x 10^−2m on an edge at the ocean's surface, decrease by 7.5 x 10−10m^3? explain the formula beyond this point: p=1.0x10^4, b=2.6x10^10, l=9.8x10^−2, delta v=7.5x10^−10. at some point l needs to be cubed. why p is divided by delta v?
Answers: 2
Physics, 22.06.2019 12:50
Which changes would result in a decrease in the gravitational force btween two objects? check all that apply
Answers: 1
Physics, 23.06.2019 06:30
What is a possible explanation for a set of facts that can be tested by further investigations called
Answers: 3
You know the right answer?
An athlete whose mass is 90.0 kg is performing weight-lifting exercises. Starting from therest posit...
Questions
History, 31.10.2019 00:31
Mathematics, 31.10.2019 00:31
Mathematics, 31.10.2019 00:31
Social Studies, 31.10.2019 00:31
Mathematics, 31.10.2019 00:31
Mathematics, 31.10.2019 00:31
History, 31.10.2019 00:31
