2007-03-14 06:08:27 · 5 answers · asked by anita c 1 in Science & Mathematics ➔ Physics
The force is the impulse (change in momentum, or mass times change in velocity) divided by the time of contact.
If fixed means it doesn't move, and the 660 pound object is perfectly hard, then the force is infinite, because the contact time is instantaneous.
Of course nothing is truly fixed or perfectly hard (didn't I just answer someone's question about immovable objects), so the impulse will be delivered over some small time, and you'll have a finite force.
2007-03-14 06:14:50 · answer #1 · answered by Anonymous · 3⤊ 0⤋
KE = (Mass x Velocity x Velocity) ÷ 2
= ½mv² = Joules = (660 x 30 x 30) ÷ 2
= (300kg x 13.33m/s²) ÷ 2
Impact force = 26,653.335 kJ
= 19,666.7 ft-lb
2007-03-14 13:31:19 · answer #2 · answered by Norrie 7 · 0⤊ 1⤋
Kinetic energy = 1/2 mass x velocity 2
2007-03-14 13:16:59 · answer #3 · answered by jack w 6 · 0⤊ 2⤋
Do your own homework!
660 lb * 30 mph
Conversions:
1 mile = 5,280 ft
1 hr = 60 min
1 min = 60 sec
1 lbf = 4.44822 newtons.
.
2007-03-14 13:25:21 · answer #4 · answered by Anonymous · 0⤊ 1⤋
If the collision is instantaneous then the force of impact is infinite.
2007-03-14 13:42:16 · answer #5 · answered by Rolan 1 · 1⤊ 0⤋