a pole vaulter of a mass of 60.0 kg vaults to a height of 6.0 m before dropping to thikc padding placed below to cushion her fall.
what is her speed with which she lands?
If the padding brings her to a stop in a time of .50 s, what is the average force on her body due to the padding during that time interval?
How do I go about solving this? What are my formulas that I would used?
2006-10-21 16:13:02 · 4 answers · asked by Trevor M 1 in Science & Mathematics ➔ Physics
First find the time to hit the mat, then use that and acceleration to find velocity.
s = 1/2 gt^2
6 = 1/2 (9.8) t^2
6/4.9 = t^2
t = 1.11 sec
v = at
v = 9.8(1.11)
v = 10.84 m/sec when she hits the mat.
Now, to find force, use F = ma. The acceleration is v/t, so
F = mv/t
F = 60 (10.84)/.5
F = 11.1 N
2006-10-21 16:29:51 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Angular momentum could also be a scalar. However: angles themselves are NOT vectors. You can exhibit that angles a, b and c, if they are orthogonal to one another, deliver unique reulting angles for a+b+c vs. a+c+b, for instance.
2016-09-01 00:40:01 · answer #2 · answered by Anonymous · 0⤊ 0⤋
To find the speed, use the relationship between speed and distance with constant acceleration.
2006-10-21 16:24:50 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Speed,v=sqrt(2gh)=sqrt(2*9.81*6)
Force,F=mass*(dv/dt)=60*(sqrt(2*9.81*6))/0.5
Pl calculate for yourself.
2006-10-21 17:54:46 · answer #4 · answered by raj shekhar 2 · 0⤊ 0⤋