In a bench pressing 85 kg, a weight lifter applies a force of 886 N. How large is the upward acceleration of the weights during the lift?
2006-12-22 14:07:14 · 5 answers · asked by rcpaden 5 in Science & Mathematics ➔ Mathematics
So am I going to divide 85 and 886?
2006-12-22 14:13:22 · update #1
Gravity exerts a downward force of F = ma = 85 * 9.8 = 833 N.
The weightlifter applies an upward force of 886 N.
The resulting force will be 886 - 833 = 53 N upwards.
The acceleration will be a = F/m = 53 / 85 = 0.62 m/s².
2006-12-22 14:27:58 · answer #1 · answered by Anonymous · 4⤊ 0⤋
you can frist choose a object.for example ,if the object is bench,then you can find how many force it has been afford.
then you can account these forces. it is important that you must choose a direction ,and the force in your direction is positive and the other is negative.if your account is a positive ,the resultant force is in your choose direction.
the acceleration is your resultant force devide the quality of the object you choose.
2006-12-22 22:23:25 · answer #2 · answered by worryd2006 1 · 0⤊ 0⤋
Benoit is correct. Kirk's four years of physics must have been Physics I taken four times.
2006-12-22 23:15:26 · answer #3 · answered by ? 6 · 1⤊ 0⤋
Think Benoit is right
2006-12-22 22:28:29 · answer #4 · answered by Fool 2 · 0⤊ 0⤋
F=m*a.....886N=(85kg)(a).....
(886) / (85)=a
2006-12-22 22:11:15 · answer #5 · answered by Kirk M 1 · 1⤊ 5⤋